This Section presents the baseline conditions of
ecological resources within the Study Area (including 500m from the boundary of
the Ecological Reserve, Development Site and Sha Lo Tung Road Improvement), and
the results of an assessment of the potential ecological impacts arising from
the construction and operation of the Project.
Baseline conditions for ecological components of the terrestrial and
associated aquatic environment were evaluated based on information from
available literature and recent ecological field update surveys conducted
during both dry and wet seasons for the purposes of this ecological
assessment. Measures required to
mitigate any identified ecological impacts have been recommended, where
appropriate.
9.2
Relevant Legislation and Assessment Criteria
The local relevant regulations, legislation and
guidelines for the protection of species and habitats of ecological importance
include the following:
·
Technical
Memorandum for the Environmental Impact Assessment Ordinance (Cap 499) (EIAO
TM);
·
Hong
Kong Planning Standards and Guidelines Chapter 10 (HKPSG);
·
Forests
and Countryside Ordinance (Cap 96) and its subsidiary legislation the Forestry
Regulations;
·
Wild
Animals Protection Ordinance (Cap 170);
·
Protection
of Endangered Species of Animals and Plants Ordinance (Cap 586);
·
Country
Parks Ordinance (Cap 208);
·
Town
Planning Ordinance (Cap 131); and
·
PRC Regulations and Guidelines.
Annex 16 of the EIAO-TM sets out the general approach and methodology for
assessments of ecological impacts arising from a project or proposal, to allow
a complete and objective identification, prediction and evaluation of the
potential ecological impacts. Annex 8 recommends the criteria that can
be used for evaluating ecological impacts.
Chapter 10 of the HKPSG
covers planning considerations relevant to conservation. This chapter details the principles of
conservation, the conservation of natural landscape and habitats, historic
buildings, archaeological sites and other antiquities. It also addresses the issue of
enforcement. The appendices list the
legislation and administrative controls for conservation, other conservation
related measures in Hong Kong and Government departments involved in
conservation.
The Forests and
Countryside Ordinance (Cap 96)
prohibits felling, cutting, burning or destroying of trees and live plants in
forests and plantations on Government land.
Related subsidiary Regulations prohibit the picking, felling or
possession of listed rare and protected plant species. The list of protected species in Hong Kong,
which comes under the Forestry Regulations, was last amended on 11 June 1993
under the Forestry (Amendment) Regulation
1993 made under Section 3 of the Forests and Countryside Ordinance.
Under the Wild
Animals Protection Ordinance (Cap 170), designated wild animals are
protected from being hunted, whilst their nests and eggs are protected from
destruction and removal. All birds and
most mammals are protected under this Ordinance. The Second Schedule of the Ordinance that
lists all the animals protected was last revised in June 1992.
The Protection
of Endangered Species of Animals and Plants Ordinance (Cap 586) was enacted
to align Hong Kong to control regime with the Convention on International Trade
in Endangered Species of Wild Fauna and Flora (CITES). With effect from 1
December 2006, it replaces the Animals
and Plants (Protection of Endangered Species) Ordinance (Cap 187). The purpose of the Protection of Endangered Species of Animals and Plants Ordinance
is to restrict the import and export of species listed in CITES Appendices so
as to protect wildlife from overexploitation or extinction. The Ordinance is primarily related to
controlling trade in threatened and endangered species and restricting the
local possession of them.
The Country
Parks Ordinance (Cap 208) provides for the designation and management of
Country Parks and Special Areas. Country
Parks are designated for the purpose of nature conservation, countryside
recreation and outdoor education.
Special Areas are reserved generally for the purpose of nature
conservation.
The amended Town
Planning Ordinance (Cap 131)
provides for the designation of coastal Protection Areas, Sites of Special
Scientific Interest (SSSI), Green Belt or other specified uses that promote
conservation or protection of the environment, e.g., Conservation Areas. The authority responsible for administering
the Town Planning Ordinance is the
Town Planning Board.
The Peoples’ Republic of China (PRC) is a Contracting
Party to the United Nations Convention on
Biological Diversity of 1992. The
Convention requires signatories to make active efforts to protect and manage
their biodiversity resources. The
Government of the Hong Kong SAR has stated that it will be “committed to
meeting the environmental objectives” of the Convention (PELB 1996). In 1988 the PRC ratified the Wild Animal Protection Law, which lays
down basic principles for protecting wild animals. The Law prohibits killing of protected
animals, controls hunting, and protects the habitats of wild animals, both
protected and non-protected. The Law
also provides for the creation of lists of animals protected at the state
level, under Class I and Class II. There
are 96 animal species in Class I and 156 in Class II. Class I provides a higher level of protection
for animals considered to be more threatened.
9.3
Description of the Study Area
The establishment of a baseline ecological profile of
the Study Area (covering areas including 500m from the Ecological Reserve,
Development Site and Sha Lo Tung Road Improvement) was based on reviewing the
available literature, previous field surveys (since 1990’s) and recent
ecological field surveys. The Project
includes three components: Ecological Reserve, Development Site and Sha Lo Tung
Road Improvement (Figure 3.1).
The Ecological Reserve will cover the Sha Lo Tung
Valley, including Sha Lo Tung SSSI and stream, which are recognised as
ecologically significant areas. The
setup of the Ecological Reserve is to maintain, protect, restore and enhance
the ecological resources of the SLT Valley.
This will be achieved by preventing unauthorised incompatible activities,
managing and restoring habitats at the “best” succession state, and by
enhancing grassland and woodland habitat.
Due to the sensitivity of SLT Valley, the proposed action plan and
enhancement works should be approved by the Government statutory fund and/or
relevant government departments including AFCD and will be implemented
progressively.
The Development Site is located at the entrance of
Sha Lo Tung Valley and surrounded by Conservation Area (located to the west),
Sha Lo Tung SSSI (located to the north) and Pat Sin Leng Country Park (located
to the east and west) (Figure 2.2). The majority of the Development Site is located in
uphill areas covered by grassland-shrubland mosaic with a number of graves
while secondary woodland was found in the valley of the site. Sha Lo Tung Road is the only road access link
between Ting Kok Road and Sha Lo Tung Valley, and Fung Yuen Valley SSSI is found located to the west of
the road (Figure 3.22). It
should be noted that the Development Site and Sha Lo Tung Road Improvement
avoids encroachment upon Conservation Area, Sha Lo Tung SSSI, Fung Yuen Valley
SSSI and Pat Sin Leng Country Park.
9.4
Ecological Resources within Pat Sin Leng
Country Park, Conservation Area, Sha Lo Tung Valley and Fung Yuen Valley Site of Special
Scientific Interest (SSSI)
Sha Lo Tung Valley is of recognized
importance for conservation, with particular focus on dragonflies and stream
habitats. The wider Sha Lo Tung area,
including the streamcourse down to Hok Tau, is an important site for breeding
and development of an extremely diverse community of odonates. Currently, over 70 species of odonates have
been recorded in Sha Lo Tung Valley since 2002, out of a total of 116 known in
Hong Kong, and the Valley is identified as the most species-rich site in Hong
Kong. Many of the species recorded are
stream specialists and include the Hainan Hooktail Lamelligomphus hainanensis and Small Dragonhunter Sieboldius alexanderi, all considered to
be rare. The Clubtailed Cruiser Macromia urania (“Least Concern” in IUCN
Red List) and the endemic Spangled Shadow-emerald Macromidia ellenae have also been recorded. The streamcourses and associated riparian
habitat have been designated as an SSSI zone to afford protection to the
dragonfly fauna.
Similar to other rural, isolated sites in
Hong Kong, Sha Lo Tung Valley supports a considerable diversity of additional
fauna including butterflies, fish, amphibians, reptiles, birds and
mammals. Species of conservation
interest observed at the site over the past 14 years include the Chinese
Pangolin Manis pentadactyla and the
Three-banded Box Terrapin Cuora
trifasciata. These species have
international and China-wide vulnerability ratings due to their widespread
consumption and use by local people. The
Hong Kong Paradise Fish Macropodus
hongongensis also occurs within the marsh and perennial stream habitats at
Sha Lo Tung, and while this fish occurs at several other sites in Hong Kong, it
is currently treated as potentially endemic.
Bird species of conservation interest include Bonelli's Eagle Hieraaetus fasciatus, and the Large
Grass Warbler Gramminicola bengalensis.
It is recognised that the habitat quality
within Sha Lo Tung Valley is degrading due to the threats such as use of four
wheel drive vehicles, hill fires, wargames and vegetation removal. In addition, the major habitats in the valley
(ie wet and dry abandoned agricultural lands) may also alter to marshy wetland
or woodland respectively through natural succession if given time and
protection from disturbance.
Pat Sin Leng Country Park,
Conservation Area, Fung Yuen Valley
SSSI and Sha Lo Tung SSSI are
located close to the Development Site and Sha Lo Tung Road Improvement. Pat Sin Leng Country
Park was designated in 1978 with an area of 3,125 hectares and surrounds the
Ecological Reserve and Development Site. Around Lau Shui Heung Reservoir and Hok Tau
Reservoir there is an abundance of local and exotic species of plants, with a
rich diversity of avifauna and general wildlife ([1]). Fung shui woods containing Camphor trees, as
well as native figs and bamboo species and a wide range of native trees ([2]) are found in abandoned
villages within the Country Park.
The Conservation Area
currently is mainly wet abandoned agricultural land, surrounded by Sha Lo Tung
SSSI, Pat Sin Leng Country Park and Green Belt (the Development Site).
Fung Yuen Valley SSSI was
designated for its outstanding butterfly community, comprising more than 125
species of butterfly alone. The forested
ravines are the breeding site of some rare butterflies.
Sha
Lo Tung SSSI was designated for its streamcourses and the freshwater marsh in
the north-eastern portion of Sha Lo Tung.
A total of 21.61 hectares covering the streamcourses, a 30m wide buffer
area on both sides of the streamcourses and woodlands are designated as
important habitats for breeding and development of a diverse community of
dragonflies and other aquatic fauna such as freshwater fish and amphibians ([3]).
9.5
Literature Review of Ecological Characteristics and Historical
Ecological Surveys
A literature review was conducted to characterise the
existing condition within the Study Area and to identify habitats and species
of potential importance in the area. The
literature review included Government and private sector reports, independent
and Government published literature, academic studies, vegetation maps and land
use maps. Reviewed information included,
but was not limited to, the following:
·
Sha
Lo Tung Development Environmental Impact Assessment (1993).
Sha Lo Tung Development Co. Ltd;
·
Sha
Lo Tung Revised Development Plan Supplementary EIA
(1995). Sha Lo Tung Development Co. Ltd;
·
Rezoning
Request for Comprehensive Development at Sha Lo Tung EIA
(1999). Sha Lo Tung Development Co. Ltd;
·
Rezoning
request to Amend Sha Lo Tung DPA Plan Supporting Information
(2000). Sha Lo Tung Development Co.Ltd;
·
The
Hong Kong Nightbird Survey 2000-01 ([4])
·
Butterfly
Larval Food Plant and Rare Plant Survey at Fung Yuen. Department of Biology, The Chinese University
of Hong Kong (December 2007);
·
Preparation
of Five-Year Management Plan for Butterfly Conservation in Fung Yuen Valley
Site of Special Scientific Interest. Final Report for AFCD. Asia Ecological
Consultants Ltd (2008); and
·
Sha Lo Tung Species List (February 2002 –
mid December 2011). Agriculture, Fisheries and Conservation Department (Ecological
information presented in Annex F1).
Extensive ecological surveys covering both wet and dry
seasons have been conducted within Sha Lo Tung Valley and along Sha Lo Tung
Road, with particular focus on the Sha Lo Tung SSSI, over the past 12 years ([5])([6])([7])([8]). The previous study areas covered the whole
Sha Lo Tung Valley including Cheung Uk, Lei Uk, and Sha Lo Tung Lo Wai, Fung Yuen
Valley SSSI, Sha Lo Tung SSSI, Pat Sin Leng Country Park, Cloudy Hill, Ping
Fung Shan Range and Sha Lo Tung Road.
The ecological significance of Sha Lo Tung Valley is
well recognised and documented. The habitats found in Sha Lo
Tung Valley and along Sha Lo Tung Road (the Study Area) during the previous
studies included grassland, shrubland, abandoned agricultural paddies, woodland
(fung shui, riverside and regenerating woodlands), plantation and freshwater
streams.
451 species of plants have been recorded within Sha Lo
Tung Valley ([9])
([10]), 16 of which were classified
as plant species under protection. 75%
were found in woodland, 12% in shrubland, 10% in grassland and 3% in streamlets
and along stream banks. The only predominantly
natural woodlands were two Fung Shui Woodlands behind Cheung Uk and Lei Uk
villages, and the two disturbed woodlands near the convergence of the four main
streams. The woodlands are Subtropical Monsoon Evergreen Broad-leaved Forest
communities, dominated by Castanopsis
fissa, Schefflera heptaphylla and Schima
superba. Plant species previously
recorded inside Sha Lo Tung Valley and protected under Forests & Countryside Ordinance are:
·
Camellia caudata, Pavetta hongkongensis, Magnolia championii, Cleisostoma
teres, Goodyera procera, Habenaria dentata, Pecteilis susannae, Spiranthes
hongkongensis, Rhododendron simsii, Liparis ferruginea, Aristolochia fordiana, and Brainea insignis
Plant
species previously recorded inside Sha Lo Tung Valley listed in the China
Plant Red Data Book are:
·
Aquilaria sinensis, Viburnum hanceanum and Artocarpus hypargyreus.
The woodland habitats have suffered from cutting and
repeated hill fires and the shrubland areas are dominated by fire climax
community ([11]). Most species present in the shrubland are
fire resistant. Disturbance of hill
fires on the existing habitats is intensive, occurring at least once every
three to five years as there are a number of graves and urns located within the
Sha Lo Tung Valley. The fires have the
effect of maintaining the habitat as dominated by shrubby grassland or
shrubland, and effectively interrupt the natural succession of the habitats.
Some old paddies have been colonized by grass
communities following the cessation of agricultural activities. Dominant species include Microstegium gratum in the flat areas covered with water ([12]). Plant species recorded in streams were
emergents or submergents and the assemblages were low in diversity. The SSSI zones along the streams protected
more than 9 ha of abandoned paddy. This
large area abuts the stream courses and provides continuity with the stream
habitats.
Sixteen mammal species were recorded within the Study Area (mainly within Sha Lo
Tung Valley), including Barking Deer (Red Muntjak), Chinese Ferret Badger, Chinese
Pangolin, Wild Boar, Chinese Porcupine, Leopard Cat, Javan Mongoose,
unidentified Civet, Chestnut Spiny Rat, Common Rat, Ryukyu Mouse, two species
of Sladen’s Rat, Greater Roundleaf Bat, Japanese Pipistrelle, Lesser Yellow Bat
and one unidentified bat species ([13]) ([14]).
All species, except Wild Boar, Chestnut Spiny Rat and Common Rat, Ryukyu
Mouse and Sladen’s Rats are protected under the Wild Animals Protection Ordinance.
AFCD’s biodiversity survey data (February 2002 – mid December 2011) also showed that fourteen mammal species were recorded within
the Sha Lo Tung Valley (only within the Sha Lo Tung Priority Site, not areas
at the fringe of Sha Lo Tung) (Annex F1).
There were over 110 species of birds recorded within
the Study Area (about 30% of Hong Kong’s total) ([15])
([16]).
Of these,
seventeen species were PRC nationally protected species, including the Class I protected Imperial Eagle. Sixteen species including Chinese Pond Heron,
Black Kite, Common Buzzard, Bonelli’s Eagle, White-bellied Sea Eagle, Crested
Goshawk, Crested Serpent Eagle, Northern Sparrow Hawk, Oriental Honey Buzzard,
Greater Coucal, Lesser Coucal, Kestrel, Black Baza, Emerald Dove, Collared
Scops Owl and Crested Bunting were listed in CITES Appendix II and the Imperial
Eagle was listed in CITES Appendix I ([17]).
The results of the Hong Kong Nightbird Survey (2000-2001)
also showed that Sha Lo Tung-Hok Tau is one of the best sites in terms of total
numbers of nightbirds detected and species diversity ([18]).
With reference to AFCD’s
biodiversity survey data (February 2002 – mid December 2011), a total of 83 bird species were recorded within Sha Lo Tung Valley (only within the
Sha Lo Tung Priority Site, not areas at the fringe of Sha Lo Tung) (Annex F1).
9.5.5
Herpetofauna (Amphibians & Reptiles)
Eight lizard/skink, ten snake,
twelve amphibian and one Terrapin species were recorded within the Study Area ([19]) ([20]). Of particular note were rare reptile species
Three-banded Box Terrapin Cuora
trifasciata. The Common Rat Snake Pytas mucosus, the Lesser Spiny Frog Paa exilispinosa, and the Hong Kong
Cascade Frog Amolops hongkongensis
are considered as species of conservation interest. The Hong Kong Cascade Frog was found breeding
in the streams at Sha Lo Tung. With
reference to AFCD’s biodiversity survey data (February 2002 – mid December 2011), five amphibians including the
Asian Common Toad Bufo melanostictus
and five reptiles were recorded within Sha Lo Tung Valley (only within the Sha
Lo Tung Priority Site, not areas at the fringe of Sha Lo Tung) (Annex F1).
A total of 128 species and 57
species were reported at Fung Yuen and Sha Lo Tung, respectively, in which 55
species were found in both sites ([21])([22])([23])([24]). For those recorded at Sha Lo Tung,
five species were considered to be uncommon, one rare and two very rare. For those recorded at Fung Yuen, 40 species
were considered to be uncommon and seven rare.
Rare species recorded included Caltoris
bromus, Halpe porus, Catochrysops sp., Pelopidas subochraceus, Catochrysops
strabo, Leptosia nina and Potanthus
pseudomaesa. With reference to
AFCD’s biodiversity survey data (February 2002 – mid December 2011), a total of 100 butterfly species
were recorded within Sha Lo Tung Valley (only within the Sha Lo Tung Priority Site, not areas
at the fringe of Sha Lo Tung) (Annex F1).
9.5.7
Odonates (Dragonfly & Damselfly)
According to
the previous studies, Sha Lo Tung Valley supported over 70 species of Odonates ([25])([26])
out of the total of 116 species found in Hong
Kong. Two endemic dragonfly species,
Elegant Clubtail Leptogomphus elegans
hongkongensis and Spangled Shadow-emerald Macromidia ellenae, out of the 64 Sha Lo Tung species, are not
known from any other location in Hong Kong.
Twenty-seven of the Sha Lo Tung species are stream specialists (ie they
do not occur in areas lacking stream habitat).
Three of the species are considered to be rare (as opposed to common or
uncommon). The checklist compiled by
AFCD (February 2002 – mid December 2011) showed that 57 odonate species,
were recorded within Sha Lo Tung Valley (only within the Sha Lo Tung Priority Site, not areas
at the fringe of Sha Lo Tung) (Annex F1).
Fourteen freshwater fishes were recorded within Sha Lo
Tung streams ([27])([28])([29])([30]). AFCD’s biodiversity survey data (February
2002 – mid December 2011) also showed that 14 freshwater fish species including Hong Kong
Paradise Fish Macropodus hongkongensis
and Predaceous chub Parazacco spilurus
(both of conservation interest), were
recorded within Sha Lo Tung Valley (only within the Sha Lo Tung Priority Site,
not areas at the fringe of Sha Lo Tung) (Annex F1).
There was one main stream with three major tributaries
within Sha Lo Tung area. Forty six
macroinvertebrate taxa were recorded in four different stream sites in
February, March, June and September 1992 ([31]). Non-insect taxa and insects taxa numbered 13
(19%) and 56 (81%) of the total 69 taxa respectively. A number of caddisflies were found at the
stream in Sha Lo Tung, such as Anisocentropus, Psilotreta, Goerodes and Helicopsyche.
9.6
Ecological Field Surveys – Survey Methodology
Although there is extensive ecological baseline
information available within Sha Lo Tung Valley as well as Fung Yuen Valley SSSI,
the potentially directly affected areas, including the Development Site and Sha
Lo Tung Road, have limited information.
As a consequence, detailed ecological surveys in this area, with special
focus on the Development Site and areas along Sha Lo Tung Road, were
required.
To supplement the limited available information
within the Development Site and areas along Sha Lo Tung Road and, to verify the
present status of Sha Lo Tung Valley, a total of 24 months of terrestrial and
aquatic ecology baseline surveys were conducted to collect baseline information
of the Study Area. The field surveys
were conducted in September 2004, July and December 2005, January and February
2006, February to May 2007, April, June, July and October 2008, June to August
2009, November 2009 to April 2010, June and November 2010, September and
October 2011 covering both the wet and dry seasons. Figure 9.1 shows the Study
Area for the ecological update. The
surveys were designed to identify the existing ecological status of the area in
order to facilitate this ecological impact assessment and to recommend any
appropriate mitigation measures. Special
attention was paid to those areas which will be directly impacted by the
proposed development as well as the Sha Lo Tung Valley.
The
following ecological surveys were undertaken for the assessment:
·
Habitat and vegetation surveys with special
focus on uncommon plants such as orchids, Aristolochia
tagala and Viburnum hanceanum;
·
Mammal surveys;
·
Bird surveys with special focus on uncommon
birds such as Large Grass Warbler and Savannah Nightjar;
·
Herpetofauna surveys with special focus on Three-banded Box Terrapin;
·
Butterfly and dragonfly surveys; and,
·
Aquatic community surveys (including
freshwater macroinvertebrates and fish).
Field
surveys focusing on habitat and vegetation (including trees) within the Study Area were performed in September 2004,
July 2005, January 2006, February 2007, March 2007, December 2007, April and
October 2008, July, August and November 2009, April, June and November 2010,
September and October 2011 (covering both the wet and dry seasons). The aim was to record ecological data within
the Study Area and establish / update the ecological profile. Habitats were mapped based on government
aerial photos (year 2011) and field ground truthing. Representative areas of each habitat type
were surveyed on foot. Plant species of
each habitat type encountered and their relative abundance were
recorded with special attention to rare or protected species. Nomenclature and conservation status of plant
species follow Xing et al. (2000) ([32])
and Wu and Lee (2000) ([33])
and Siu (2000) ([34]).
Mammal surveys (included day and
night-time surveys, covering both the wet and dry seasons) were carried out in
July and December 2005, January 2006, February, April and May 2007, June, July
and October 2008, June to August 2009 and November 2009, April, June and
November 2010, September and October 2011.
As most mammals occur at low densities, all sightings, tracks, and signs
of mammals (including dropping) were actively searched along the survey transects
(see Figure 9.1).
Nomenclature for mammals follows AFCD (2006) ([35]). No quantification of abundance of mammals in
the Study Area was made, due to the difficulties in translating sights and
tracks (eg burrows) to actual abundance.
Bird surveys were carried out in July 2005, December
2005, January 2006 February 2007, April and May 2007, October 2008, June to
August 2009, November 2009, April, June and November 2010, September and
October 2011 (included day and
night-time surveys, covering both the wet and dry seasons). The bird communities of the major habitats
(secondary woodland, plantation, grassland shrubland mosaic, wet and dry
abandoned agricultural land, stream and developed area) within the Study Area
were surveyed using the transect/ point count method subject
to the on-site conditions. Locations of sampling points and transects
are shown in Figure 9.1. Ten minutes were spent counting birds at each
sampling point, and all birds seen or heard within 30 m of each point were
counted and identified to species where possible. Birds flying directly overhead at
each sampling point (eg birds of prey, swifts and swallows, corvids) were also
included in the sampling point records. Signs of breeding (eg nests, recently
fledged juveniles) within the Study Area were also recorded, if any. Bird species encountered outside counting
points but within the Study Area were also recorded to produce a complete
species list. Ornithological nomenclature
in this report follows Viney et al
(2006) ([36]).
Herpetofauna surveys (included day and
night-time surveys, covering both the wet and dry seasons) were carried out in
July 2005, December 2005, January 2006, February, April and May 2007, June,
July and October 2008, June to August 2009, November 2009, April, June and
November 2010, September and October 2011.
Herpetofauna surveys were conducted through direct observation and
active searching or trapping/ caging if considered appropriate, in all major
habitat types along the survey transects (see Figure
9.1)
and in potential hiding places such as among leaf litter, inside holes, under
stones and logs within the Study Area.
Auditory detection of species-specific calls was also used to survey
frogs and toads. During the surveys, all
reptiles and amphibians sighted and heard were recorded. Nomenclature and status used for reptiles
follows Karen et al 1998 ([37]) and AFCD 2006 ([38])
while that of amphibians follows AFCD 2005 ([39]).
9.6.6
Butterflies and Odonates
Dragonfly, damselfly and butterfly surveys (covering
both the wet and dry seasons) were carried out in July 2005, December 2005,
January 2006, February, April and May 2007, June, July and October 2008, June
to August 2009, November 2009, April 2010 and November 2010, September and
October 2011. Dragonflies, damselflies
and butterflies of different habitats within the Study Area were surveyed using
the transect / point
count method subject to the on-site conditions.
The sampling points and transects for dragonflies and butterflies are
shown in Figure 9.1. Ten minutes
were spent at each sampling point, dragonflies, damselflies and butterflies
within 30 m of the survey points were identified and counted. Relative abundance of dragonflies and
butterflies in each type of habitat were estimated. Dragonflies, damselflies and butterflies
encountered outside counting points (ie along transects) but within the Study
Area were recorded in order to produce a complete species list. Nomenclature for butterflies follows Walthew
1997 ([40])
and Yiu 2004 ([41]), and dragonfly/ damselfly nomenclature
follows Wilson (2004) ([42]).
Streams
identified within the Study Area were visited.
All streams were within the Ecological Reserve. Some small pools of water supporting aquatic
life were found in the wet abandoned agricultural land within the secondary
woodland to the northeast of (but outside) the Development Site. Surveys for freshwater fish and other aquatic
fauna (ie amphibian and reptile) were carried out in September 2004, December
2005, February, April and May 2007, June, July and October 2008, July and
August 2009, April, June and November 2010, September and October 2011
(covering both the wet and dry seasons).
Freshwater fish were studied by methods including bank side observation,
active search using hand nets, and fish capturing using fish cages. Surveys
for aquatic macroinvertebrates were carried out in the perennial streams in
July and August 2009. Aquatic
macroinvertebrates were studied by direct observation and active searching by
hand nets and standard field sampling techniques (eg kick sampling). Active sampling was carried out for most
parts of the stream course. Organisms,
mostly aquatic macroinvertebrates (eg freshwater crabs & shrimps,
freshwater molluscs and aquatic insect larvae) were recorded and identified.
9.7
Results of Ecological Field Update
9.7.1
Existing Habitat and Vegetation
Habitats found within the Study Area included Fung
shui woods, secondary woodland, plantation, grassland shrubland mosaic, stream,
wet and dry abandoned agricultural land, active agricultural land and developed
area. Habitats found are shown in the
habitat map (Figure 9.2). Photographic records of various habitats
recorded within the Study are presented in Figures 9.3 to 9.5. A total of 431 plant species were recorded
during the study periods (Annex F2). Table
9.1 lists the number of plant species recorded in, and total area occupied
by, each habitat in the Study Area in 2011.
Hance’s Viburnum Viburnum
hanceanum, a native shrub listed in the ‘Rare and Precious Plants of Hong
Kong’, which had previously been found in the Study Area, was not recorded
during the ecological field updates.
Table
9.1 Plant Species Recorded within
Each Habitat of Study Area
Habitat |
Number of Plant Species |
Total Area within the Study Area (ha) |
Fung shui woods |
76 |
~ 3.1 |
Secondary Woodland |
233 |
~123.2 |
Plantation |
130 |
~ 20.1 |
Grassland shrubland
Mosaic |
163 |
~ 230.0 |
Wet Abandoned
Agricultural Land |
105 |
~ 27.3 |
Dry Abandoned
Agricultural Land |
82 |
~ 18.5 |
Active Agricultural Land |
49 |
~ 2.0 |
Stream |
95 |
~ 9.5 km |
Developed Area |
121 |
~ 71.9 |
Secondary Woodland and Fung Shui Woods
Secondary woodland patches were mainly found at the
western part of Sha Lo Tung Road, western part of Fung Yuen Valley and
scattered in ravines and sheltered hillsides.
The secondary woodlands were mostly mature woodlands of age of more than
40 years. The oldest woodlands were the
Fung Shui woods located behind Cheung Uk, Lei Uk and Lo Wai Villages in Sha Lo
Tung Valley. The woodland was dominated
by climax native tree species such as Schima
superba, accompanied by some native tree species including Schefflera heptaphylla, Endospermum
chinense, Cinnamomum camphora and Aporusa
dioica. Canopy species reached a
height of 8-12 m and some trees of considerable size were found. The understorey was densely vegetated and
dominated by woody species including Litsea
rotundifolia, Psychotria asiatica, the climbers Gnetum montanum and Smilax
china and seedlings of canopy species such as Schima superba and Schefflera
heptaphylla.
There were 76 plant species recorded within the Fung
Shui woodland (Annex F2), including
three of conservation interest (Terete Cleisostoma Cleisostoma simondii, Hong
Kong Pavetta Pavetta hongkongensis and Lamb
of Tartary Cibotium barometz) which
were also found in secondary woodland
The floristic diversity of Fung Shui woods was low to moderate and the
structural complexity was moderate. The
ecological value was considered to be high.
There was a total of 233 plant species recorded
within the secondary woodland (Annex F2). Ten plant species of conservation interest,
including Incense Tree Aquilaria
sinensis, Terete Cleisostoma Cleisostoma
simondii, Common Tutcheria Tutcheria spectabilis, Indian Birthwort Aristolochia tagala, Hong Kong Pavetta Pavetta hongkongensis, Lamb of Tartary Cibotium barometz, Hairy Fruited Ormosia Tree Ormosia pachycarpa, Illigera Illigera
celebica, Hong Kong Mucuna Mucuna
championii and Willow-leaved
Camellia Camellia salicifolia, were recorded (for locations refer to Figure 9.6; photographic records are shown in Figures 9.7 &
9.8).
Incense Tree is a common tree in Hong Kong but is listed in Protection of Endangered Species of Animals
and Plants Ordinance (Cap 586). It
is also listed as a Category
II protected plant in China, in the List
of Wild Plants under State Protection and is listed as ‘vulnerable’ by both
the China Plant Red Data Book and by IUCN (2010). Terete Cleisostoma is an epiphytic orchid
species recorded on mature trees in the Sha Lo Tung valley. The whole family of orchids is protected
under Forestry and Countryside Ordinance (Cap
96) and Protection of Endangered Species of Animals and
Plants Ordinance (Cap
586). Indian Birthwort is a larval
foodplant of the Birdwing butterfly and was recorded in Fung Yuen Valley which
is designated as a Butterfly Protection Area.
Hong Kong Pavetta is a common understory species
found in woodland habitat in Hong Kong and is frequently found in the Study
Area. Lamb of Tartary is a very common fern locally but is
listed as vulnerable and a Category II protected plant in the People’s Republic
of China (PRC) in the List of Wild Plants
under State Protection as well as being listed in Appendix 2 of CITES. Both Hong Kong Pavetta and Lamb of Tartary are used in Chinese medicine.
Terete Cleisostoma, Common Tutcheria, Indian Birthwort and Hong Kong Pavetta are protected under Forestry
and Countryside Ordinance (Cap. 96).
Hairy Fruited Ormosia Tree has a restricted distribution in Hong Kong
while it is endangered in China ([43]).
Illigera is a very rare butterfly larval foodplant locally and is
protected under Forestry and Countryside Ordinance (Cap 96). Hong Kong Mucuna is a rare climber locally
and endangered in China ([44])
although it is not protected
in Hong Kong. Willow-leaved Camellia is a common tree in Hong Kong, but the
whole genus Camellia is protected under Forestry
and Countryside Ordinance (Cap
96). The floristic diversity and the
structural complexity of secondary woodlands was high. The ecological value of the secondary
woodland was considered to be moderate to high.
The photographic record of secondary woodland is shown in Figure 9.3.
Plantation was located mainly at the south of the
Study Area from the WSD service reservoir downhill to Ting Kok Road, in Tai Po
Industrial Estate and along the roads with small patches found in the north and
to the west of Fung Yuen. Most trees
were exotic species, including Acacia
confusa, Pinus elliotii and Lophostemon
confertus. A study of old government
aerial photos indicates that the plantation along Sha Lo Tung Road is about 20
years old, probably planted after the construction of the service
reservoir. Some native tree, shrub and
herb species had colonized the understorey, but at a lower density and
diversity than in the understory of the secondary woodland. Despite its tall canopy and rapid growth, the
plantation remained relatively simple in structure, was immature and lacked
diversity. Plantation in Tai Po
Industrial Estate and along the roads was mainly dominated by Leucaena leucocephala and other exotic
landscaping trees. In total 130 species
were recorded in plantation habitat.
Two plant species protected under the Forestry and Countryside Ordinance (Cap
96), Rhodoleia Rhodoleia championii
and Common Tutcheria Tutcheria spectablis
were recorded (for locations refer to Figure 9.6; photographic
records are shown in Figures 9.7 & 9.8). Common
Tutcheria has a restricted
distribution in Hong Kong while Rhodoleia
is locally very rare in natural woodland and vulnerable in China although
it is also widely planted. In addition
to Rhodoleia and Common Tutcheria, Lamb of Tartary Cibotium barometz, protected under Endangered Species of Animals and Plants Ordinance (Cap 586) was
recorded. It is a very common fern
locally but listed as vulnerable and a Category II protected plant in PRC in
the List of Wild Plants under State
Protection as well as being listed in Appendix
2 of CITES. The floristic diversity of plantation was
moderate while its ecological value was considered to be low. A photographic record of plantation is shown
in Figure 9.3.
Grassland shrubland mosaic with scattered graves and
urns was found at most of the exposed hillsides within the Study Area. The habitat was found to be disturbed by hill
fires during the grave sweeping festivals, which interrupts the natural
succession of vegetation. The grassland
shrubland mosaic was dominated by fern
species Dicranopteris pedata and grass species Miscanthus sinensis and accompanied by
some shrub species including Smilax china,
Rhodomyrtus tomentosa, Rhaphiolepis indica and Baeckea frutescens and occasionally by scattered trees such
as Rhus chinensis, Schima superba and Aporosa dioica. Native tree seedlings were planted along
some trails on grassland shrubland mosaic habitats to speed up succession. In total 163 plant species were found during
the surveys within the grassland shrubland mosaic. Among these, five of them (Buttercup Orchid Spathoglottis
pubescens, Hong Kong Pavetta Pavetta hongkongensis, Susan Orchid Pecteilis
susannae, Lamb of Tartary Cibotium barometz and Bamboo Orchid Arundina
graminifolia) are protected species in Hong Kong (for locations
refer to Figure 9.6;
photographic records are shown in Figures 9.7 & 9.8). Only Bamboo
Orchid was recorded within the Development Site.
One other plant species of conservation interest,
Cycad Fern Brainea insignis was found
in locations to the west of the Ecological Reserve, north of Fung Yuen and also
along the Sha Lo Tung road (for locations refer to Figure 9.6). It is not protected in Hong Kong, but is a
wild plant under State protection (Category II) in PRC and considered
vulnerable there.
Susan Orchid is restricted, Buttercup Orchid is very common and Bamboo Orchid is common in
Hong Kong, however, all orchids are protected from possession and/or sale under
the Forestry and Countryside Ordinance
(Cap 96) and also protected the Protection of Endangered
Species of Animals and Plants Ordinance (Cap 586). Lamb of Tartary was seen in more mature parts of the habitat, where
the canopy height was higher. The
floristic diversity of grassland shrubland mosaic was moderate and the
structural complexity was low. The
ecological value of grassland
shrubland mosaic was considered to be low to moderate. A photographic record of the grassland
shrubland mosaic is shown in Figure 9.3.
Wet and Dry Abandoned Agricultural Land
Agricultural land was found mainly in Fung Yuen
Valley and Sha Lo Tung Valley, mostly abandoned and invaded with grasses and
weed plants after cessation of agricultural activity. The
wet abandoned agricultural land, usually located near streams, was dominated by
remnants of crops, mainly Ginger Lily Hedychium coronarium and/or native
grasses, ferns and herbs including Microstegium ciliatum, Cyrtococcum
patens, Cyclosorus interruptus, and Commelina nudiflora. The dry abandoned agricultural land on
higher ground was dominated by fruit trees and weeds including Saccharum arundinaceum, Neyraudia
arundinacea, Miscanthus
sinensis, Bidens pilosa and the weedy climber Mikania micrantha.
Small pools and ditches (expect to be formed in the
past for irrigation purpose) were also found in the wet abandoned agricultural
land located within the secondary woodland at the northeast of but outside the
Development Site (photographic record is shown in Figure 9.9). The wet abandoned agricultural land located
outside the Development Site found almost dried up, except the small pools,
during dry season. The water appeared to
be coming from the perched water table, as water seeping below ground rather than
as surface flow, from areas above the pools.
In wet season, the water seeped through the wet abandoned agricultural
field (with Ginger Lily) to the north in the direction of Sha Lo Tung
Stream. The pools have shallower water
depth and relatively static water, in particular during dry season.
105 plant species were recorded within wet abandoned
agricultural land and 82 recorded within dry abandoned agricultural land. Three plant species of conservation interest
were recorded in wet abandoned agricultural land (Terete Cleisostoma Cleisostoma simondii, Lamb of Tartary Cibotium barometz and Hong Kong Pavetta Pavetta hongkongensis) with all these
except Hong Kong Pavetta also recorded in dry abandoned agricultural land. The floristic diversity of both wet and dry abandoned
agricultural land is considered low to moderate (but dominated by exotic
species and weeds) and the structural complexity is considered low.
The ecological value of dry abandoned agricultural
land is considered to be low and that of wet abandoned agricultural land, low
to moderate at
Fung Yuen (due to small isolated plots, degraded and fragmented in nature) and
moderate at Sha Lo Tung (not due to plant diversity but records
of Hong Kong Paradise Fish Macropodus hongkongensis). Photographic records of wet
and dry abandoned agricultural land are shown in Figure 9.4.
Only a few plots of agricultural lands located at Sha
Lo Tung and Fung Yuen were still active.
Fruit trees and vegetables were the main crops in these plots. 49 species were recorded on active
agricultural land. The floristic
diversity of this habitat is considered low and the structural complexity is
considered low. The ecological value of
active agricultural land is also considered to be low. A photographic record of active agricultural
land is shown in Figure 9.4
Natural perennial streams were found running through Sha
Lo Tung Valley at the northern part of the Study Area. The riparian vegetation community of the
perennial streams was integrated with the surrounding secondary woodland with
semi-open canopy. The bed of the
perennial streams was rocky with medium-sized boulders. Medium water flow was recorded even during
the dry season surveys. The perennial
streams were far away from the residential area and less disturbed by human
activities. The perennial stream
recorded at Fung Yuen Valley was more or less modified where the stream bank
has been reinforced with rocks or concrete.
Certain sections of the lower course of Fung Yuen stream is under
channelization, while the upper section inside the SSSI remained more or less natural.
A total of 95 plant species were found along the
streams. Two plant species of
conservation interest, Lamb of Tartary
Cibotium barometz and Incense
Tree Aquilaria sinensis (see Section 9.7.1 Secondary Woodland and Fung
Shui Woods for conservation status of these two species) were recorded at
the perennial streams in the Sha Lo Tung Valley. The ecological value of natural perennial
streams at Sha Lo Tung and Fung Yuen were considered to be high and moderate
respectively. Photographic records of
the perennial streams are shown in Figures 9.4 & 9.5.
Developed area found within the Study Area comprised
villages, roads and paths, parks, WSD service reservoir and the Tai Po Industrial
Estates, and wasteland. 121 plant
species of limited conservation value including road side trees, fruit trees
and weedy species were recorded within the developed area. The ecological value of developed area was
considered negligible. The photographic
record of developed area is shown in Figure 9.5.
Seven mammal species
including Common Bent-winged Bat Miniopterus
schreibersii, Red Muntjak Muntiacus
muntjak, Eurasian Wild Pig Sus scrofa,
Rhesus Macaque Macaca
mulatta, Pallas's
Squirrel Callosciurus
erythraeus, Masked Palm Civet Paguma larvata and Chestnut Spiny Rat Niviventer fulvescens were recorded within the Study Area
during the ecological surveys (Annex F2). Five species, Common Bent-winged Bat, Barking Deer (Red Muntjak), Masked Palm Civet, Rhesus Macaque and
Pallas's Squirrel, are protected under Wild
Animals Protection Ordinance (Cap 170).
In addition, the Common Bent-winged Bat is listed as near threatened in IUCN Red List. The Rhesus Macaque is listed in the Protection
of Endangered Species of Animals and Plants Ordinance (Cap. 586), listed as vulnerable
in the China Red Data Book and listed in CITES Appendix 2. The locations
of these species of conservation interest are shown in Figure 9.6.
In addition, further to the previous studies as
discussed in Section 9.5.3, a total
of eight species
of larger mammals and eight species of small mammals were previously recorded
within the Study Area (mainly
within Sha Lo Tung Valley), including Barking Deer (Red Muntjak), Chinese Ferret Badger, Chinese
Pangolin, Wild Boar, Chinese Porcupine, Leopard Cat, Javan Mongoose,
unidentified Civet, Chestnut Spiny Rat, Common Rat, Ryukyu Mouse, two species
of Sladen’s Rat, Greater Roundleaf Bat, Japanese Pipistrelle, Lesser Yellow Bat
and one unidentified bat species ([45])([46]).
There were a total of 89 species of birds recorded
within the Study Area during the ecological surveys (Annex F2). It should be noted that there were over 110 species
of birds recorded previously within the Study Area and Sha Lo Tung Valley ([47])
([48]).
Relative abundance and species richness of birds in
each type of surveyed habitat, based on the results of the point count method
of the surveys, are shown in Table
9.2. Woodland, grassland shrubland
mosaic and stream all showed high species abundance in the wet season, although
stream had the greatest species richness.
In the dry season dry abandoned agricultural land showed by far the
greatest species abundance, although stream again had the greatest species
richness.
Table 9.2 Relative
Abundance of Bird Species Recorded within Each Habitat of the Study Area and
within the Main Works Area (including the Development Site and Sha Lo Tung Road
Improvement)
|
Study Area |
Main Works Area |
||||||
|
Woodland (Secondary &
Fung Shui) |
Plantation |
Grassland/ Shrubland
Mosaic |
Wet Abandoned
Agricultural Land |
Dry Abandoned
Agricultural Land |
Stream |
Developed Area |
|
Wet Season |
|
|
|
|
|
|
|
|
Mean Abundance of Birds
(Mean # birds per sampling point) |
10.87 |
7.93 |
7.30 |
10.71 |
9.05 |
10.73 |
8.50 |
7.48 |
Species Richness ( Mean #
of species per sampling point) |
5.58 |
4.27 |
4.20 |
5.86 |
5.11 |
6.73 |
4.75 |
4.29 |
Total # of Birds Recorded |
565 |
119 |
409 |
225 |
172 |
118 |
102 |
157 |
Total # of Species
Recorded |
48 |
18 |
33 |
41 |
25 |
27 |
20 |
27 |
Dry Season |
|
|
|
|
|
|
|
|
Mean Abundance of Birds (Mean
# birds per sampling point) |
13.75 |
8.61 |
6.84 |
13.63 |
34.75 |
19.50 |
8.38 |
10.62 |
Species Richness ( Mean #
of species per sampling point) |
5.71 |
4.11 |
3.14 |
5.00 |
6.50 |
7.63 |
3.63 |
4.23 |
Total # of Birds Recorded |
385 |
155 |
253 |
109 |
417 |
156 |
67 |
276 |
Total # of Species
Recorded |
42 |
20 |
29 |
29 |
26 |
25 |
16 |
31 |
Most of the bird species recorded are common and widespread in Hong Kong
(eg, Chinese Bulbul Pycnonotus sinensis and
Red-whiskered Bulbul Pycnonotus jocosus). Wintering birds such as Daurian Redstart Phoenicurus auroreus, Red-flanked
Blue-tail Tarsiger cyanurus, Japanese
Thrush, Grey-backed Thrush and Common Blackbird Turdus spp., Scaly Thrush Zoothera
dauma, Dusky Warbler, Yellow-browed Warbler and Pallas's Leaf Warbler Phylloscopus spp. and Silky Starling Sturnus
sericeus were recorded in the Study Area (Annex F2).
Among the bird species recorded within the Study
Area, there are 13 species of conservation interest; nine species are PRC
nationally protected species, six are listed in CITES Appendix 2 and seven are protected under Protection of Endangered Species of Animals and Plants Ordinance,
(Cap 586) (NB all bird species in Hong Kong are also protected under Wild Animals Protection Ordinance
(WAPO)(Cap. 170). The 13 species include
Crested Goshawk Accipiter trivirgatus, Common Buzzard
Buteo buteo,
Black Kite Milvus migrans, Crested Serpent Eagle
Spilornis cheela, Lesser Coucal Centropus bengalensis, Greater Coucal Centropus sinensis, Emerald Dove
Chalcophaps indica, Yellow-breasted Bunting Emberiza aureola, Kestrel (Common/Eurasian
Kestrel) Falco tinnunculus, Slaty-legged Crake Rallina
eurizonoides,
Asian Barred Owlet / Cuckoo Owl Glaucidium cuculoides, Hwamei Garrulax canorus and Collared Scops Owl Otus lettia (Annex
F2). Apart from the 13 bird species
of conservation interest listed above, Savanna Nightjar Caprimulgus
affinis was also recorded within the Study Area. The locations of the recorded species of conservation interest / rare
species are shown on Figure 9.6.
The Crested Goshawk is a Class 2 Protected Animal of
PRC and being a member of the Falconiformes is listed in CITES Appendix 2. It is listed as “Rare” in China Red Data Book. It is protected under Cap 586 in Hong
Kong. It is a locally uncommon resident
widespread in the forest and mature woodlands of the New Territories in Hong
Kong. It was recorded flying over wet
and dry abandoned agricultural land during the surveys and also cited in
woodland.
The Common Buzzard is a Class 2 Protected Animal of
PRC and being a member of the Falconiformes is listed in CITES Appendix 2. It is protected under Cap 586 in Hong
Kong. The species is a common winter
visitor to Hong Kong and is mainly found in open habitats. It was recorded in or flying over stream, wet
and dry abandoned agricultural land, grassland shrubland mosaic and woodland
during the surveys.
The Black Kite is a very widespread and common
species in Hong Kong. It is conspicuous
in the urban area and over Victoria Harbour all year around. It is more numerous in winter than in summer
and the number peaks in December and January ([49]).
It is found in a wide variety of coastal and inland habitats, including
small islands, sea-coasts, intertidal mudflat, fish ponds, reservoirs,
landfills and grassy hillsides at all altitudes. It is listed as a Class 2 Protected Animal of
the PRC and being a member of the Falconiformes it is listed in CITES Appendix 2 as well as being protected
under Cap 586 in Hong Kong. During the
surveys it was recorded in or over all habitats except plantation and active
agricultural land.
The Crested Serpent Eagle is a Class 2 Protected
Animal of PRC and being a member of the Falconiformes is listed in CITES Appendix 2. It is listed as “Vulnerable” in China Red Data Book. It is also protected under Cap 586 in Hong
Kong. The species is an uncommon
resident to Hong Kong ([50]), and is mostly found in woodland area or
soaring near woodlands. It was recorded
perching in the secondary woodland during one survey as well as in or overhead
for woodland, plantation, grassland shrubland mosaic, wet agricultural land and
stream.
The Lesser Coucal is a Class 2 Protected Animal in
PRC and is categorised as ”Vulnerable” in China
Red Data Book and a common resident in Hong Kong. It occupies many types of habitats in Hong
Kong, including shrubland, grassland and agricultural areas ([51]).
It was recorded in the grassland shrubland mosaic during the survey as
well as in wet abandoned agricultural land and woodland.
The Greater Coucal is a Class 2 Protected Animal in the
PRC and is categorised as ”Vulnerable” in China
Red Data Book. However, it occupies
many types of habitats in Hong Kong ([52]), and is a common resident. It is frequently found in grasslands,
mangroves, marshes, agricultural lands with scattered trees and bushes, open
canopy shrubland, fung shui woods and gardens, and has been noted foraging in
refuse. It was found perching in wet and
dry abandoned agricultural land during the surveys as well as in or over all
other habitats except developed area and active agricultural land.
The Emerald Dove Chalcophaps indica is categorised as ”Vulnerable” in
the China Red Data Book. It is a scarce but widespread resident in
Hong Kong. It was recorded utilizing
secondary woodland as foraging and breeding sites during the surveys and also
in the developed areas.
The Yellow-breasted Bunting Emberiza aureola is categorised as “Vulnerable” in the IUCN Red List. It is a common passage migrant through Hong Kong. It was recorded in secondary woodland during
surveys.
The Common Kestrel is listed in Appendix 2 of CITES and is a Class 2 Protected Animal in PRC. It is also protected under Cap 586 in Hong
Kong. It is found in many open areas and
is a common autumn migrant and winter visitor through Hong Kong. It was recorded foraging in the dry abandoned
agricultural land during the survey as well as recorded in or over stream
habitats.
The Slaty-legged Crake Rallina eurizonoides is categorised
as an “Intermediate” species in China
Red Data Book. It is a common summer
visitor in Hong Kong. It was recorded
foraging in dry abandoned agricultural land during surveys.
The Asian Barred Owlet is an uncommon resident in
Hong Kong. It is listed as a Class 2
Protected Animal of the PRC and is protected in Hong Kong by the Protection of Endangered Species of Animals
and Plant Ordinance (Cap 586). It is
an uncommon resident in Hong Kong.
During the surveys it was recorded flying over wet abandoned
agricultural land and woodland.
The Hwamei is listed in CITES Appendix 2. It is a common
resident in Hong Kong and almost endemic to the PRC. The Hwamei is commonly found on hillsides and
shrubland in Hong Kong and has also been seen at large parks in Yuen Long and
Hong Kong Island. It was recorded in wet
and dry abandoned agricultural land, woodland and grassland shrubland mosaic
and over stream habitat during the survey.
The Collared Scops Owl is a Class 2 Protected Animal
of PRC and is protected under Cap 586 in Hong Kong. The species is a widespread and common
resident in Hong Kong ([53]).
It was heard in the woodland during night surveys and also in wet and
dry agricultural land.
The Savanna Nightjar Caprimulgus affinis, an uncommon
resident and passage migrant in Hong Kong, was also recorded in the Study
Area. It was recorded at night or in the
evening in the dry abandoned agricultural land within the Ecological Reserve,
grassland shrubland mosaic within the Development Site and sitting on the Sha
Lo Tung road (Developed Area).
Large Grass Warbler Graminicola
bengalensis, previously recorded within Sha Lo Tung Valley, was not
recorded during the 24 months ecological surveys for this EIA study. It is listed as “Near Threatened” in the IUCN
Red List and is a rare resident in Hong Kong. The Large Grass Warbler utilises lowland grassland elsewhere in its
distribution range (including Ho Chung, Fei Ngo Shan, Fung Yuen, Sha Lo Tung,
Kowloon Peak, Chuen Lung, Shing Mun and Tai To Yan), it uses high elevation
grassland during the breeding season (above 500m and Tai Mo Shan is considered
as the major habitat for this species) and with some altitudinal movement in
winter ([54]).
Seventeen
reptiles, including King Corba Ophiophagus hannah, Banded Stream Snake
Opisthotropis balteata, White-spotted Slug Snake Pareas
margaritophorus, Mock Viper Psammodynastes
pulverulentus, Common Rat Snake Ptyas
mucosus, Red-necked Keelback Rhabdophis
subminiatus helleri and Bamboo Snake Trimeresurus
albolabris, Banded Krait Bungarus fasciatus, Changeable Lizard Calotes
versicolor, Four-clawed Gecko Gehyra
mutilata, Bowring’s Gecko Hemidactylus
bowringii, Indian Forest Skink Sphenomorphus
indicus, Chinese Waterside Skink Tropidophorus
sinicus, Reeve’s Smooth Skink Scincella reevesii, Long-tailed Skink Mabuya longicaudata, Chinese Gecko Gekko chinensis
and Chinese Skink Eumeces chinensis,
and fourteen amphibian species, including Hong Kong Newt Paramesotriton hongkongensis, Hong Kong Cascade
Frog Amolops hongkongensis, Brown Wood Frog Rana latouchii, Green Cascade Frog Rana livida, Chinese Bullfrog Hoplobatrachus chuinensis, Brown Tree Frog Polypedates megacephalus, Asiatic Painted Frog Kaloula pulchra pulchra, Ornate Pigmy Frog Microhyla ornata, Marbled Pigmy Frog Microhyla pulchra, Gunther’s Frog Rana guentheri, Paddy Frog Fejervarya limnocharis, Butler’s Pigmy
Frog Microhyla butleri, Lesser Spiny Frog Paa exilispinosa and Asian Common Toad Bufo
melanostictus, were recorded during the surveys (Annex F2). All of the recorded species are common in
Hong Kong except the Banded Krait which is uncommon in Hong Kong (and no status given for the Banded Stream Snake Opisthotropis balteata). King Cobra (Listed in CITES Appendix
2 and as “Critically endangered” in the China Red Data Book and protected under Cap 586 in Hong Kong), Common Rat Snake (Class 2
protected animal in PRC and Listed as “Endangered” in China Red Data Book), Banded Krait (listed as “endangered” in the China Red Data Book), Hong Kong Newt (listed as “near threatened” in IUCN Red List and protected
under Cap 170 in Hong Kong), Lesser Spiny Frog
(listed as “vulnerable” in IUCN Red List), Chinese Bullfrog (Class 2
protected animal in PRC) and Hong Kong Cascade Frog (protected under Cap 170 in
Hong Kong) are considered as species of conservation interest and all of them
were recorded in the Ecological Reserve area during the ecological field update
surveys (for locations refer to Figure 9.6).
It should be noted that a total of eight lizard, ten
snake, and twelve amphibian species were recorded previously in Sha Lo Tung
Valley ([55])
([56]), including the following
species of conservation interest: Common Rat Snake Pytas mucosus, Three-banded Box Terrapin Cuora trifasciata, Lesser Spiny Frog Paa exilispinosa, Hong Kong Newt Paramesotriton hongkongensis and Hong Kong Cascade Frog Amolops hongkongensis. The Hong Kong Cascade Frog was found breeding
in the streams at Sha Lo Tung. AFCD’s
biodiversity survey data (February 2002 – mid December 2011) also showed that five species of amphibian and five species of reptiles
including Asian Common Toad Bufo
melanostictus, Paddy Frog Fejervarya
limnocharis, Gunther’s Frog Rana
guentheri, Spotted Narrow-mouthed
Frog Kalophrynus interlineatus, Brown
Tree Frog Polypedates megacephalus, Common Three-banded Box
Terrapin Cuora trifasciata, Chinese
Gecko Gecko chinensis, Bowring’s Gecko Hemidactylus bowringii, Reeves’ Smooth Skink Scincella reevesii and Indian Forest Skink Sphenomorphus indicus were recorded within the Sha Lo Tung Valley (only within the Sha Lo Tung Priority Site, not areas at the fringe of Sha Lo Tung) (Annex F1).
There were a total of 102 species of butterflies were
recorded within the Study Area during the ecological surveys (Annex F2). Most
are either common or very common in Hong Kong, and were mainly recorded in
secondary woodland and abandoned agricultural land. Three butterfly species of conservation
interest, including Common Birdwing Troides
Helena, Golden Birdwing Troides
aeacus and Yellow Coster Acraea
issoria, were recorded within the Study Area during the surveys.
The Common Birdwing is protected in Hong Kong under
Cap 170 and Cap 586 and the Golden Birdwing is also protected in Hong Kong
under Cap 586. Both the Common Birdwing
and the Golden Birdwing, being Troides spp.,
are listed in Appendix 2 of
CITES. The Yellow Coster is a rare
butterfly in Hong Kong. The locations of
the recorded rare / protected species are shown on Figure 9.6. It should be noted that up to 130 butterfly species
have previously been recorded at Fung Yuen and Sha Lo Tung ([57])([58])([59])([60]).
The relative abundance and species richness of
butterflies in each type of surveyed habitat, based on the results of point
count surveys during the wet and dry season, are shown in Table 9.3. The highest mean
abundance was recorded in Stream in the wet season and Plantation in the dry
season, while species richness was clearly highest in woodland in the wet
season and stream in the dry season. The
least number of butterfly species was recorded in the developed area in the wet
season whereas in the dry season, the number of species was lowest in
plantation, wet abandoned agricultural land (both wet and dry) and developed
area. In the wet season developed area
habitat showed the lowest ‘total number of butterflies recorded’ compared to
other habitats, while in the dry season both wet abandoned agricultural land
and developed area habitats recorded the lowest total number of butterflies. It should be noted that most of the butterfly
species, including the rare and protected species, were recorded in Fung Yuen
and the Sha Lo Tung Valley.
Table 9.3 Relative
Abundance of Butterfly Species Recorded within Each Habitat of the Study Area
and within the Main Works Area (including the Development Site and Sha Lo Tung
Road Improvement)
|
Study Area |
Main |
||||||
|
Woodland (Secondary & Fung
Shui) |
Plantation |
Grassland/ Shrubland
Mosaic |
Abandoned Agricultural
Land (Wet) |
Abandoned Agricultural
Land (Dry) |
Stream |
Developed Area |
|
Wet Season |
|
|
|
|
|
|
|
|
Mean Abundance of
Butterflies (Mean # butterflies per sampling point) |
8.88 |
5.55 |
4.79 |
7.10 |
8.05 |
9.20 |
3.88 |
4.87 |
Species Richness ( Mean #
of species per sampling point) |
7.33 |
4.09 |
4.26 |
5.45 |
6.33 |
6.00 |
3.13 |
4.00 |
Total # of Butterflies
Recorded |
453 |
61 |
206 |
142 |
161 |
92 |
31 |
112 |
Total # of Species
Recorded |
78 |
25 |
61 |
45 |
53 |
38 |
17 |
52 |
Dry Season |
|
|
|
|
|
|
|
|
Mean Abundance of
Butterflies (Mean # butterflies per sampling point) |
6.11 |
8.00 |
2.63 |
1.25 |
2.50 |
7.50 |
2.33 |
3.71 |
Species Richness ( Mean #
of species per sampling point) |
4.67 |
3.67 |
2.00 |
1.25 |
2.25 |
6.50 |
2.00 |
2.86 |
Total # of Butterflies
Recorded |
55 |
24 |
21 |
5 |
10 |
15 |
7 |
26 |
Total # of Species
Recorded |
26 |
9 |
10 |
5 |
8 |
13. |
6 |
17 |
A total of 53 odonate species were recorded within
the Study Area during surveys (Annex F2). The odonate species were mainly recorded in
abandoned agricultural land and woodland within the Sha Lo Tung Valley. Most of the recorded species are either
common or very common in Hong Kong.
Three odonate species of conservation interest were recorded, all of
them being dragonflies rather than damselflies.
One of them was recorded during the ecological surveys (the rare Chinese
Tiger Gomphidia kelloggi) and two
during surveys done by Green Power during the study period ([61]).
The exuviae only of a rare Large Dragonhunter Sieboldius deflexus was found on the morning of 18 May 2009 and the
rare White-tipped Grappletail Heliogomphus
retroflexus was recorded at night on 1 July 2009 ([62]).
The locations of the recorded species of conservation interest are shown
on Figure 9.6.
The relative abundance and species richness of
odonates in each type of surveyed habitat, based on the results of the point
count surveys during the wet and dry seasons, are shown in Table 9.4. During the wet
season stream recorded the highest species richness while wet abandoned
agricultural land had the highest mean abundance. In the dry season, dry abandoned agricultural
land recorded the highest species richness and mean abundance. Most total number of odonates and different
number of species were recorded in woodland during the wet season and in dry
abandoned agricultural land in the dry season.
It should be noted that most of the odonate species were recorded in the
Sha Lo Tung Valley and Sha Lo Tung Streams during the qualitative transect
surveys rather than the quantitative point count surveys and more quantitative
point count surveys were done during the wet rather than the dry season.
Currently, over 70 species of odonates have been
recorded in Sha Lo Tung Valley since 2002, out of a total of 116 known in Hong
Kong, and the Valley is identified as the most species-rich site in Hong Kong
(AFCD Biodiversity Database, Annex F1). Many of the species recorded are stream
specialists and include uncommon dragonfly species such as the Dusk-hawker Gynacantha sp., South China Cruiser Macromia katae, the Small Clubtail Stylogomphus chunliuae, Coaster Glider Macrodiplax cora, Angle-winged Cruiser Macromia berlandi and the Greater Blue
Skimmer Orthetrum melania.
Table 9.4 Relative
Abundance of Odonate Species Recorded within Each Habitat of the Study Area and
within the Main Works Area (including the Development Site and Sha Lo Tung Road
Improvement)
|
Study Area |
Main Works Area |
||||||
|
Woodland (Secondary & Fung
Shui) |
Plantation |
Grassland/ Shrubland
Mosaic |
Abandoned Agricultural
Land (Wet) |
Abandoned Agricultural
Land (Dry) |
Stream |
Developed Area |
|
Wet Season |
|
|
|
|
|
|
|
|
Mean Abundance of
Odonates (Mean # odonates per sampling point) |
8.00 |
4.50 |
2.96 |
9.80 |
6.85 |
6.56 |
2.33 |
4.25 |
Species Richness ( Mean #
of species per sampling point) |
4.07 |
1.50 |
1.71 |
2.80 |
2.92 |
4.11 |
1.17 |
2.50 |
Total # of Odonates
Recorded |
216 |
18 |
71 |
147 |
89 |
59 |
14 |
51 |
Total # of Species
Recorded |
32 |
3 |
12 |
21 |
14 |
19 |
2 |
14 |
Dry Season |
|
|
|
|
|
|
|
|
Mean Abundance of
Odonates (Mean # dragonflies per sampling point) |
0.44 |
1.00 |
0.50 |
0.25 |
2.00 |
1.00 |
0.67 |
0.14 |
Species Richness ( Mean #
of species per sampling point) |
0.44 |
1.00 |
0.50 |
0.25 |
1.50 |
1.00 |
0.33 |
0.14 |
Total # of Odonates
Recorded |
4 |
3 |
4 |
1 |
8 |
2 |
2 |
1 |
Total # of Species Recorded |
3 |
2 |
2 |
1 |
4 |
2 |
1 |
1 |
In total, 18 species, which belong to 15 genera and 9
families, of freshwater fish species were found along the aforementioned streams
within the Study area in both the dry and wet seasons. Except the species Poecilia reticulata, Gambusia
affinis, Xiphophorus hellerii and
Xiphophorus variatus, which are
introduced and originated in Central America and Africa, the rest are all native
species. The Hong Kong Paradise Fish Macropodus hongkongensis (uncommon in Hong Kong), Small Snakehead Channa asiatica (uncommon in Hong Kong)
and Predaceous Chub Parazacco spilurus (listed as
”Vulnerable” in China Red Data Book)
are considered as species of conservation interest. The species
recorded within the natural stream and wet abandoned agricultural land within the Sha Lo Tung Valley (but not in the Development Site) are
presented in Annex F2.
Thirty-five macroinvertebrate families were also
recorded in Sha Lo Tung area and 24 in the Fung Yuen area. Overall, crustaceans, insects and gastropods
numbered 3 families (8%), 29 families (78%) and 5 families (14%)
respectively. Six families of insects,
Hydrophilidae, Eulichalidae, Elmidae, Chironomidae, Simuliidae and Baetidae,
were found at all eight sampling points within the Sha Lo Tung and Fung Yuen
streams. Five macroinvertebrate families
were only recorded in one location; these included the crustaceans Macrobrachium hainanense (Palaemonidae
family) and Varuna litterata (Grapsidae family), the Ecnomidae and Odontoceridae insect families and
the Thiaridae gastropod family.
9.7.8
Summary of Terrestrial Ecological
Resources
The ecological importance of the habitats and
wildlife identified within the Study Area during the survey are evaluated in
accordance with the EIAO TM Annex 8 criteria, and presented in Tables 9.5 to 9.10. The species of
conservation interest shown in Table 9.11
present only those species recorded during the ecological surveys
(including dragonflies from the Green Power surveys ([63])), but not the species from the literature
review. It should be noted that all of
the previous recorded species of conservation interest (from literature review)
were found within either Sha Lo Tung Valley (Ecological Reserve, not including
the Development Site) or Fung Yuen Valley SSSI.
The evaluation of terrestrial baseline ecological resources of the Study
Area was based on the literature review and ecological surveys, including
habitat and vegetation, birds, stream fauna and other wildlife surveys,
conducted since 2004. Habitats recorded
within the Study Area included Fung Shui woods, secondary woodland, plantation,
grassland shrubland mosaic, abandoned (wet and dry) and active agricultural
land, stream and developed area. The
ecological value of Fung Shui woods and natural, perennial streams at Sha Lo
Tung were high while that of secondary woodland was moderate to high The ecological value of the natural,
perennial stream at Fung Yuen and the wet abandoned agricultural land (Sha Lo
Tung) was considered to be moderate. The
ecological value of plantation, active agricultural land, and dry abandoned
agricultural land was low; wet abandoned agricultural land (Fung Yuen) and
grassland shrubland mosaic had a low to moderate ecological value whilst the
ecological value of developed area was negligible.
Table 9.5 Ecological Evaluation of Secondary
Woodland and Fung Shui Woods
Criteria |
Fung Shui Woods |
Secondary Woodland |
Naturalness |
Semi-natural
dominated by native plants. |
Semi-natural
dominated by native plants. |
Size |
Patches of Fung
Shui woods were recorded within the Study Area with an overall size of
approximately 3.1 ha. |
Patches of
secondary woodland were recorded within the Study Area with an overall size
of approximately 123.2 ha. |
Diversity |
Low to moderate
diversity of plants (76 species) and faunal diversity Moderate structural
complexity. |
High diversity of plants
(230 species) and structural complexity, low to moderate for faunal
diversity. |
Rarity |
Plant species of
conservation Interest included Hong Kong Pavetta (Pavetta
hongkongensis), Lamb of Tartary (Cibotium
barometz) and Terete
Cleisostoma (Cleisostoma simondii). Mammal species of
conservation interest included Pallas’s Squirrel (Callosciurus erythraeus) Bird species of
conservation Interest included Hwamei (Garrulax canorus) and Greater
Coucal (Centropus sinensis). Butterfly species
of conservation Interest included Common Birdwing (Troides helena). |
Plant species of
conservation Interest included Incense Tree (Aquilaria sinensis), Lamb
of Tartary (Cibotium barometz), Terete Cleisostoma Cleisostoma simondii, Indian Birthwort (Aristolochia tagala), Common
Tutcheria (Tutcheria spectabilis),
Hong
Kong Pavetta (Pavetta
hongkongensis), Hairy Fruited Ormosia Tree (Ormosia pachycarpa), Illigera (Illigera celebica), Hong Kong Mucuna (Mucuna championii), Willow-leaved Camellia (Camellia salicifolia). Mammal species of
conservation interest included Common Bent-winged Bat (Miniopterus
schreibersii), Rhesus Macaque (Macaca mulatta),
Masked Palm Civet (Paguma
larvata) and Red Muntjak (Muntiacus
muntjak) (heard but not seen). Bird species of conservation
Interest included Crested Goshawk (Accipiter
trivirgatus), Common Buzzard (Buteo
buteo) (flying overhead), Black Kite (Milvus
migrans), Crested Serpent Eagle (Spilornis cheela), Lesser Coucal
(Centropus bengalensis), Greater Coucal (Centropus sinensis), Emerald Dove (Chalcophaps indica),
Yellow-brested Bunting (Emberiza aureola), Asian Barred Owlet / Cuckoo
Owl (Glaucidium cuculoides), Hwamei
(Garrulax canorus) and Collared Scops Owl (Otis lettiaand). Herpetofauna
species of conservation Interest included King
Cobra (Ophiophagus hannah) and Less Spiny Frog (Paa
exilispinosa). Butterfly species
of conservation Interest included Common Birdwing (Troides helena spilotia) and Golden Birdwing (Troides aeacus). Dragonfly species
of conservation Interest included Club-tailed Cruiser (Macromia urania). |
Re-creatability |
Habitat
characteristics and species composition are natural and mature. It would take more than 30 years for the
fung shui woods to be re-created. |
Habitat characteristics
and species composition are natural and mature. It would take more than 30 years for the
secondary woodland to be re-created. |
Fragmentation |
Not fragmented |
Fragmented by the
topography and the historical agricultural activities. |
Ecological Linkage |
Functionally
linked to the Sha Lo Tung Valley/ Fung Yuen Valley in close proximity. |
Functionally
linked to the Sha Lo Tung Valley and Fung Yuen Valley in close proximity. |
Potential Value |
High, becoming
mature woodland if given time and protection from disturbance. |
High, becoming
mature woodland if given time and protection from disturbance. |
Nursery/ Breeding
Ground |
Nil |
Nil. |
Age |
High (more than 50
years) based on tree size, woodland structure and species composition. |
Moderate to high
(around 40 years) based on tree size, woodland structure and species
composition. |
Abundance/
Richness of Wildlife |
Moderate
abundance for general wildlife. |
Moderate
abundance for general wildlife. |
Overall Ecological
Value |
High |
Moderate
to high |
Table 9.6 Ecological Evaluation of Plantation
Criteria |
Plantation |
Naturalness |
Plantation
woodland dominated by a few exotic plants. |
Size |
Continuous plantation
patches were recorded within the Study Area with an overall size of
approximately 20.1 ha. |
Diversity |
Moderate diversity
of plants (130 species), low for faunal diversity. |
Rarity |
Plant species of conservation
Interest included Rhodoleia Rhodoleia
championii, Lamb of Tartary (Cibotium
barometz) and Common Tutcheria Tutcheria
spectabilis. Bird species of
conservation Interest included Crested Serpent Eagle (Spilornis cheela) and Greater Coucal (Centropus sinensis). |
Re-creatability |
Habitat
characteristics and species composition are easy to recreate. It will take about 10 years for the
plantation to be re-created. |
Fragmentation |
Not applicable. |
Ecological Linkage |
Not functionally linked
to any highly valued habitat in close proximity. |
Potential Value |
Low to moderate,
becoming mature woodland if given time and protection from disturbance. |
Nursery/ Breeding
Ground |
Nil. |
Age |
Low (10-20 years) based
on tree size, woodland structure and species composition. |
Abundance/
Richness of Wildlife |
Low to
moderate abundance for fauna. |
Overall Ecological
Value |
Low |
Table 9.7 Ecological
Evaluation of Grassland Shrubland Mosaic
Criteria |
Grassland Shrubland Mosaic |
Naturalness |
Semi-natural habitats
and disturbed by human activities such as fires. |
Size |
Patches were recorded within the Study Area with an
overall size of approximately 230.0 ha.
|
Diversity |
Moderate diversity of plants (151 species), low structural
complexity and low for
faunal diversity. |
Rarity |
Plant species of conservation interest included Cycad-fern
(Brainea insignis), Hong Kong Pavetta (Pavetta hongkongensis), Susan Orchid (Pecteilis susannae),
Buttercup Orchid (Spathoglottis pubescens), Bamboo
Orchid (Arundina graminifolia) and
Lamb of Tartary (Cibotium barometz)
Bird species of conservation interest included Common
Buzzard (Buteo buteo) (Flying
overhead), Black Kite (Milvus migrans),
Crested Serpent Eagle (Spilornis cheela), Lesser Coucal (Centropus
bengalensis), Greater Coucal (Centropus
sinensis) and Hwamei (Garrulax canorus). The rare Savannah Nightjar (Caprimulgus affinisi) was also
recorded in this habitat. |
Re-creatability |
Habitat characteristics and species composition are easy
to recreate. It would take 5 to 10
years for the grassland shrubland mosaic to be re-created. |
Fragmentation |
Not applicable. |
Ecological Linkage |
Not functionally linked to any highly valued habitat in
close proximity. |
Potential Value |
Low to moderate, becoming mature shrubland if given time
and protection from disturbance. |
Nursery/ Breeding Ground |
Nil. |
Age |
Not applicable, habitat frequently disturbed by fires. |
Abundance/ Richness of Wildlife |
Low abundance for avifauna and other wildlife. |
Overall Ecological Value |
Low to moderate |
Table 9.8a Ecological Evaluation of Active
Agricultural Land
Criteria |
Agricultural Land (Active) |
Naturalness |
Man-made
habitat actively cultivated. |
Size |
Very small patches
of active agricultural land were recorded within the Study Area with an
overall size of approximately 2.0 ha. |
Diversity |
Low diversity of
plants (49 species) and low for structural complexity, low for avifauna and
low for other fauna. |
Rarity |
No flora or fauna
of conservation interest were found in active agricultural land. |
Re-creatability |
Habitat characteristics
and species composition are easy to recreate.
|
Fragmentation |
Not applicable. |
Ecological Linkage |
Not functionally
linked to any highly valued habitat in close proximity. |
Potential Value |
Low to moderate, some
along streamside may become wetland if given time and protection from
disturbance. |
Nursery/ Breeding
Ground |
Nil. |
Age |
n/a. |
Abundance/
Richness of Wildlife |
Low abundance for
fauna. |
Overall Ecological
Value |
Low |
Table 9.8b Ecological Evaluation of Abandoned
Agricultural Land
Criteria |
Wet Abandoned Agricultural Land
(Sha Lo Tung) |
Wet Abandoned Agricultural Land
(Fung Yuen) |
Dry Abandoned Agricultural Land |
Naturalness |
Man-made habitat
abandoned for natural succession. |
Man-made
habitat abandoned for natural succession |
Man-made
habitat abandoned for natural succession. |
Size |
One major and one
large patch of wet abandoned agricultural land were recorded in the Sha Lo Tung
area, while eleven small, isolated patches were recorded around Fung Yuen
amongst the dry abandoned agricultural land.
The overall size of the wet abandoned agricultural land was
approximately 27.3 ha. |
Three main patches
of dry abandoned agricultural land were recorded within the Study Area. The overall size was approximately 18.5
ha. |
|
Diversity |
Low to moderate
diversity of plants (104 species) and low for structural complexity, moderate
for fauna |
Low to moderate
diversity of plants (82 species) and low for structural complexity, Low for
fauna |
|
Rarity |
Plant species of
conservation Interest included Terete Cleisostoma (Cleisostoma simondii),
Lamb of Tartary (Cibotium barometz)
and Hong Kong Pavetta (Pavetta hongkongensis). Bird species of
conservation Interest included Crested Goshawk (Accipiter trivirgatus), Common Buzzard (Buteo buteo), Black Kite (Milvus migrans), Crested Serpent Eagle (Spilornis cheela), Lesser Coucal (Centropus
bengalensis), Greater Coucal (Centropus
sinensis), Hwamei (Garrulax canorus), Collared Scops Owl (Otis
lettia), and flying overhead, Asian Barred Owlet / Cuckoo Owl (Glaucidium
cuculoides), Herpetofauna
species of conservation Interest included Chinese Bullfrog Hoplobatrachus
chuinensis, Lesser Spiny Frog Paa
exilispinosa, Banded
Krait Bungarus
fasciatus and King Cobra Ophiophagus hannah. Butterfly species
of conservation interest included the Yellow Coster (Acraea issoria). Fish of conservation interest included Hong Kong Paradise Fish (Macropodus hongkongensis), Small snakehead (Channa asiatica) and
Predaceous Chub (Parazacco spilurus). Most of the above
were recorded within Sha Lo Tung Valley.
|
No flora or fauna
of conservation interest were recorded. |
Plant species of
conservation interest include Terete Cleisostoma (Cleisostoma simondii)
and Lamb of Tartary (Cibotium barometz) Bird species of
conservation interest included Crested Goshawk (Accipiter trivirgatus), Common Buzzard (Buteo buteo), Black Kite (Milvus migrans), Crested Serpent Eagle (Spilornis cheela), Greater Coucal (Centropus sinensis), Common
Kestrel (Falco tinnunculus), Hwamei (Garrulax canorus), Collared
Scops Owl (Otis lettia), and flying overhead, Slaty-legged Crake (Rallina
eurizonoides). The rare Savannah Nightjar (Caprimulgus affinis) was also recorded in this habitat Herpetofauna species of conservation interest included the Common Rat
Snake (Ptyas mucosus) Butterfly species
of conservation interest included the Yellow Coster (Acraea issoria). |
Re-creatability |
It would take 5 to
10 years for the abandoned agricultural land to be re-created to serve its
ecological function. |
||
Fragmentation |
Contiguous stands
in Sha Lo Tung Valley and the north east of the Study Area. |
Isolated pockets
in Fung Yuen Valley |
One large patch in
Sha Lo Tung Valley, contiguous stands in Fuen Yuen with one isolated patch
east of Ha Hang. |
Ecological Linkage |
Hydrologically
linked to streams. |
Not functionally linked
to any highly valued habitat in close proximity. |
Not functionally
linked to any highly valued habitat in close proximity. |
Potential Value |
Low to moderate,
some along streamside may become marshy wetland if given time and protection
from disturbance. |
Low |
Low to moderate,
some may become woodland if given time and protection from disturbance |
Nursery/ Breeding
Ground |
Possibly for
dragonflies and Hong Kong Paradise Fish. |
Nil |
Nil |
Age |
Moderate (10- 20
years) |
Moderate (10- 20 years) |
Moderate (10- 20
years) |
Abundance/
Richness of Wildlife |
Low to moderate
abundance for fauna. |
Low abundance for
fauna |
Low to moderate
abundance for fauna |
Overall Ecological
Value |
Moderate |
Low
to Moderate |
Low |
Table 9.9 Ecological Evaluation of Stream
Criteria |
Perennial Streams at Sha Lo Tung |
Perennial
Stream at Fung Yuen |
Naturalness |
Natural
habitat dominated by native plants. |
Natural at
the upper stream. Stream bank was cemented
at the lower course and was under channelization work. |
Size |
Total length is
approximately 7.7 km. |
Total length is
approximately 1.8 km. |
Diversity |
Low to moderate diversity
of plants (95 species), high for faunal species particularly dragonfly
species. Currently, over 70 species of
odonates have been recorded in Sha Lo Tung Valley since 2002, out of a total
of 116 known in Hong Kong. Many of the species recorded are stream
specialists. |
Low to moderate
diversity of plants (63 species), low to moderate for other faunal species. |
Rarity |
Plants of
conservation Interest included Lamb of Tartary (Cibotium barometz),
Incense Tree (Aquilaria sinensis). Birds of conservation
interest found flying overhead or nearby included Common Buzzard (Buteo buteo), Black Kite (Milvus migrans), Crested Serpent Eagle
(Spilornis cheela), Greater Coucal (Centropus sinensis), Kestrel
(Common/Eurasian Kestrel) (Falco
tinnunculus) and Hwamei (Garrulax
canorus), Herpetofauna of
conservation interest included Hong
Kong Newt Paramesotriton hongkongensis and Hong Kong
Cascade Frog (Amolops hongkongensis). Dragonfly species
of conservation interest included the Chinese Tiger Gomphidia kelloggi). Green
Power surveys ([64])
also recorded Large
Dragonhunter (Sieboldius deflexus)
and White-tipped Grappletail (Heliogomphus
retroflexus) in this habitat. Fish of conservation interest included Hong Kong Paradise Fish (Macropodus hongkongensis), Small snakehead (Channa asiatica) and
Predaceous Chub (Parazacco spilurus). |
Fish of conservation interest included Small snakehead
(Channa asiatica). |
Re-creatability |
Habitat
characteristics and species composition are difficult to recreate. |
|
Fragmentation |
Not applicable. |
Not applicable. |
Ecological Linkage |
Functionally
linked to the Sha Lo Tung Valley in close proximity. |
Not functionally
linked to any highly valued habitat in close proximity. |
Potential Value |
High |
Moderate to high
if given time and protection from disturbance. |
Nursery/ Breeding
Ground |
Streams at Sha Lo
Tung Valley are very important for breeding and development of an extremely
diverse community of dragonflies.
Possible breeding ground for Hong Kong Paradise Fish. |
Nil. |
Age |
Not applicable |
Not applicable |
Abundance/
Richness of Wildlife |
High for
dragonfly and moderate for other fauna. |
Low to moderate
abundance for fauna. |
Overall Ecological
Value |
High |
Moderate |
Table 9.10 Ecological Evaluation of Developed Area
Criteria |
Developed Area |
Naturalness |
Man-made
habitat dominated by landscape plants and weed plants. |
Size |
Major patches were
recorded within the Study Area with an overall size of approximately 71.9
ha. |
Diversity |
Moderate diversity
of plants (121 species), and low for faunal species. |
Rarity |
No flora of
conservation interest. Bird species of conservation
Interest included Black Kite (Milvus
migrans) flying overhead, Emerald Dove (Chalcophaps indica) and finally Savannah
Nightjar (Caprimulgus affinis) resting on the
Sha Lo Tung road. |
Re-creatability |
Habitat
characteristics and species composition are easy to recreate. |
Fragmentation |
Not applicable. |
Ecological Linkage |
Not functionally
linked to any highly valued habitat in close proximity. |
Potential Value |
Low. |
Nursery/ Breeding
Ground |
Nil. |
Age |
Not applicable. |
Abundance/
Richness of Wildlife |
Low for faunal
species. |
Overall Ecological
Value |
Negligible |
A list
and evaluation of recently recorded key floral and faunal species of ecological
interest during ecological field update surveys recorded within the Study Area,
according to the EIAO-TM, are given
in Table 9.11. It should be noted that there have been
numerous species of conservation interest recorded within Sha Lo Tung Valley in
surveys conducted prior to the update surveys, and the details were presented
in Sections 9.5.2-9.5.8. The locations of recorded species of
conservation interest, whenever available, are also presented in Figure 9.6.
Table 9.11 Evaluation of Floral and Faunal Species of
Conservation Interest recorded within the Study Area during the Ecological
Surveys in both Dry and Wet Seasons
Species |
Location
and Activities (if any) |
Protection
Status |
Distribution
|
Commonness
in Hong Kong |
|
Plant |
|||||
Incense
Tree Aquilaria sinensis |
In
woodland along the existing Sha Lo Tung Road, Kau Shi Wai and along stream in
Sha Lo Tung Valley |
Protected
under the Protection of Endangered
Species of Animals and Plants Ordinance (Cap 586); Category II protected plant in the List of Wild Plants under State Protection
in PRC; Near Threatened in PRC ([65]); Listed as “Vulnerable” in the China Plant Red Data Book and by
IUCN (2010) |
Lowland
forests and Fung shui woods |
Common |
|
Hong Kong Pavetta |
In
woodland in Sha Lo Tung Valley and along the existing Sha Lo Tung Road |
Protected
under Forestry and Countryside
Ordinance (Cap 96) |
Fung
shui woods and lowland forest |
Common |
|
Lamb of
Tartary Cibotium barometz |
In
woodland, along stream and wet abandoned agricultural land, all in Sha Lo
Tung Valley and also in woodland along the existing Sha Lo Tung Road |
Protected under Protection of Endangered Species of
Animals and Plants Ordinance (Cap 586).
Vulnerable in PRC ([66]); Category II
protected plant in the List of Wild
Plants under State Protection in PRC; Appendix 2 of CITES |
Forest
and shrubland |
Very
common |
|
Rhodoleia
Rhodoleia championii |
In
plantation along the existing Sha Lo Tung Road |
Vulnerable in PRC ([67]); Protected
under Forestry and Countryside
Ordinance (Cap 96) |
Forest |
Very
rare |
|
Indian
Birthwort Aristolochia tagala |
In woodland in Fung Yuen SSSI |
Protected
under Forestry and Countryside
Ordinance (Cap 96) |
Forest |
Rare |
|
Terete Cleisostoma Cleisostoma simondii. |
In
woodland and streamside in the Sha Lo Tung Valley |
The
whole family of orchids (which includes Cleisostoma
spp.) are protected under Forestry and
Countryside Ordinance (Cap 96) and Protection of Endangered Species of Animals and
Plants Ordinance (Cap 586) |
Forest
and forest edges beside stream |
Very
common |
|
Hairy Fruited Ormosia Tree Ormosia Pachycarpa |
In
woodland in the Sha Lo Tung Valley |
Endangered
in PRC ([68]). Not
protected in Hong Kong |
Forest |
Restricted |
|
Common Tutcheria Tutcheria
spectabilis |
In
secondary woodland within the Sha Lo Tung Valley and in plantation along the
existing Sha Lo Tung Road |
Protected
under Forestry and Countryside
Ordinance (Cap 96) |
Lowland
forests and fung shui woods |
Restricted
|
|
Willow-leaved Camellia Camellia salicifolia |
In
woodland in the Sha Lo Tung Valley and the Development Site |
Protected
under Forestry and Countryside
Ordinance (Cap 96) |
Lowland
forests and fung shui woods |
Common |
|
Buttercup Orchid Spathoglottis pubescens |
In
grassland shrubland mosaic |
Protected
under Forestry and Countryside
Ordinance (Cap 96) and Protection of Endangered Species of Animals and Plants Ordinance (Cap
586) |
Grassland |
Very
common |
|
Illigera
Illigera
celebica |
In woodland in Fung Yuen SSSI |
Protected
under Forestry and Countryside
Ordinance (Cap 96); Least concern in PRC ([69])
|
Lowland
forest margins |
Very
Rare |
|
Hong
Kong Mucuna Mucuna championii |
In woodland in Fung Yuen SSSI |
Endangered
in PRC ([70]); Not protected in Hong Kong |
Lowland
forest |
Rare |
|
Cycad-fern
Brainea insignis |
In grassland
shrubland mosaic and on Sha Lo Tung road |
Vulnerable in PRC ([71]); Category II
protected plant in the List of Wild
Plants under State Protection in PRC |
On
grassy slopes or in thickets |
Common |
|
Susan
Orchid, Common Pecteilis Pecteilis susannae* |
In
grassland shrubland mosaic outside Study Area |
Protected
under Forestry and Countryside
Ordinance (Cap 96) and Protection of Endangered Species of Animals and Plants Ordinance (Cap
586) |
Grassland |
Restricted |
|
Hance’s
Viburnum Viburnum hanceanum |
Not
recorded within Study Area during update field surveys |
Least
Concern in PRC ([72]) |
In
valleys or in thickets |
Very
Rare |
|
Bamboo
Orchid Arundina graminifolia |
Recorded
within the grassland shrubland mosaic of the Development Site |
Protected
under Forestry and Countryside
Ordinance (Cap 96) and Protection of Endangered Species of Animals and Plants Ordinance (Cap
586) |
Grassland |
Common |
|
Mammal |
|
|
|
|
|
Common Bent-winged Bat Miniopterus
schreibersii, |
Recorded
in secondary woodland in the Sha Lo Tung Valley |
Protected under Wild Animals Protection
Ordinance (Cap. 170) and listed as neat
threatened in IUCN Red
List |
Widely
distributed in forested areas throughout Hong Kong. |
Abundant |
|
Red Muntjak Muntiacus muntjak |
Heard
near secondary woodland within the area of the Ecological Reserve during a
night survey (location cannot be recorded) |
Protected
under Wild Animals Protection Ordinance
(Cap 170) |
Forested
areas throughout Hong Kong |
Abundant |
|
Masked
Palm Civet Paguma larvata |
Seen
near secondary woodland within Sha Lo Tung Valley during a night survey |
Protected
under Wild Animals Protection Ordinance
(Cap 170) |
Widely distributed
in forested areas throughout Hong Kong, except Lantau Island and Northwest
N.T |
Uncommon |
|
Pallas’s Squirrel Callosciurus
erythraeus |
Recorded
in fung shui woodland in the area of the Ecological Reserve |
Protected
under Wild Animals Protection Ordinance
(Cap 170) |
Lowland
forests and fung shui woods |
Uncommon |
|
Rhesus Macaque Macaca mulatta |
Recorded
in secondary woodland in the area of the Ecological Reserve and in secondary
woodland to the south of the Study Area |
Protected
under Wild Animals Protection Ordinance
(Cap 170) and Protection of Endangered
Species of Animals and Plants Ordinance (Cap. 586); Appendix
2 of CITES and listed as “Vulnerable” by China Red Data Book |
Lowland
forests and fung shui woods |
Common |
|
Bird |
|
NB All
birds in Hong Kong are Protected under the Wild Animals Protection Ordinance (Cap 170). |
|
|
|
Crested Goshawk Accipiter trivirgatus |
Flew
over wet and dry abandoned agriculture land of the Study Area, foraging and also
cited in woodland |
Class 2
Protected Animal of PRC; Protected
under Protection of Endangered Species
of Animals and Plants Ordinance (Cap. 586); Listed as “Rare” in China Red Data Book; Appendix 2 of CITES |
Widely distributed
in woodlands and shrublands throughout Hong Kong, widespread in PRC |
Locally
uncommon resident in Hong Kong |
|
Common Buzzard Buteo buteo |
Flew
over wet and dry abandoned agriculture land, grassland shrubland mosaic, woodland
and stream in the Study Area, foraging |
Class 2
Protected Animal of PRC; Protected
under Protection of Endangered Species
of Animals and Plants Ordinance (Cap. 586); Appendix
2 of CITES |
Found
in many types of habitats; Palaearctic, Himalayas, African, Oriental |
common
winter visitor |
|
Black Kite Milvus migrans |
Flew
over wet and dry abandoned agriculture land, woodland, grassland shrubland
mosaic, developed area and stream of the Study Area; foraging |
Class 2
Protected Animal of PRC; Protected
under Protection of Endangered Species
of Animals and Plants Ordinance (Cap. 586); Appendix
2 of CITES |
Found
in many types of habitats; East Eurasia |
Common
and widespread. Resident and Winter Visitor |
|
Crested Serpent Eagle Spilornis
cheela |
Perched
on tree of the secondary woodland in the Study Area. Also found in wet and dry abandoned
agricultural land, plantation, woodland, grassland shrubland mosaic and over
stream habitats |
Class 2
Protected Animal of PRC. Protected
under Protection of Endangered Species
of Animals and Plants Ordinance (Cap. 586). Listed as “Vulnerable” in China Red Data Book. Appendix 2 of CITES. |
Found
in woodland area; India, South China, Philippines and Indonesia |
Uncommon
resident bird in Hong Kong |
|
Lesser Coucal Centropus
bengalensis |
Recorded in the grassland shrubland mosaic, secondary woodland and wet abandoned agricultural land of the Study Area;
foraging |
Class 2
Protected Animal of PRC. Listed as
“Vulnerable” in China Red Data Book. |
Found
in shrubby area of Hong Kong; Oriental |
Common
resident in Hong Kong |
|
Greater Coucal Centropus sinensis |
In wet and dry abandoned agricultural area of the Study Area,
perching. Also found in fung shui and secondary
woodland, grassland shrubland mosaic, plantation and over stream |
Class 2
Protected Animal of PRC. Listed as
”Vulnerable” in China Red Data Book.
|
Found in many types of habitats in Hong Kong; Oriental |
Common and widespread resident in Hong Kong; Very
rare in China |
|
Emerald Dove Chalcophaps indica |
Recorded in secondary woodland and developed area |
Listed
at “Vulnerable” in China Red Data Book |
Favours
thick woodland and good secondary growth.
South Asia and Australia |
scarce but
widespread resident in Hong Kong |
|
Yellow-breasted Bunting Emberiza aureola |
Recorded in secondary woodland |
Listed
at “Vulnerable” in the IUCN Red List |
Found
in woodland and hillsides with thick scrub cover. Eurasia |
Common
passage migrant through Hong Kong |
|
Common / Eurasian Kestrel Falco tinnunculus |
Recorded foraging in dry abandoned agriculture land as well as in or
over stream in the Study Area |
Class 2
Protected Animal of PRC; Protected
under Protection of Endangered Species
of Animals and Plants Ordinance (Cap. 586); Appendix
2 of CITES |
Found
in open areas, Eurasia and Africa |
common
autumn migrant and winter visitor through Hong Kong |
|
Slaty-legged Crake Rallina eurizonoides |
Recorded in the dry abandoned agriculture land of the Study Area. Three birds recorded in one night survey |
Listed
at “Indeterminate” in the China Red
Data Book |
Found
in woodland and hillsides with thick scrub cover; Oriental |
common
summer visitor in Hong Kong |
|
Asian Barred Owlet / Cuckoo Owl Glaucidium cuculoides |
Recorded
flying over wet abandoned agricultural land and secondary woodland. In Sha Lo
Tung valley |
Class 2
Protected Animal of PRC; Protected
under Protection of Endangered Species
of Animals and Plants Ordinance (Cap. 586) |
Widely
distributed in woodland throughout Hong Kong.
Oriental including South China. |
Uncommon
resident in Hong Kong |
|
Hwamei Garrulax canorus |
Recorded in wet and dry abandoned agriculture land, fung shui and secondary
woodland, grassland shrubland mosaic and over stream
in the Study Area; foraging |
Appendix 2 of CITES |
Found
in woodland and hillsides with thick scrub cover; North Indo-China to China
and South China |
Common
resident in Hong Kong |
|
Collared Scops Owl Otis lettia |
At
least three birds were heard in the secondary woodland of the Study Area
during one night survey and also around wet and dry abandoned agricultural
land during other surveys |
Class 2
Protected Animal of PRC. Protected under
Protection of Endangered Species of
Animals and Plants Ordinance (Cap. 586) |
Found
in woodland area; Oriental including South China |
Common
resident owl species in Hong Kong |
|
Savanna Nightjar Caprimulgus affinis |
Recorded at night or in the evening in dry abandoned agricultural land
in Sha Lo Tung Valley, in grassland shrubland mosaic in the Development Site
and on the Sha Lo Tung road (Developed Area) |
Uncommon in
Hong Kong |
Widely
distributed in Hong Kong |
uncommon resident and passage migrant in Hong Kong |
|
Large Grass Warbler Graminicola bengalensis |
Previously recorded in Sha Lo Tung but not recorded in the ecological
surveys |
Listed
as “Near Threatened” in IUCN Red List |
Widely distributed
in montane grassland throughout Hong Kong.
Nepal to South China |
Rare
resident in Hong Kong |
|
Herpetofauna |
|
|
|
|
|
Hong Kong Newt
Paramesotriton hongkongensis |
Recorded
in stream Sha Lo Tung Valley. |
Protected under Wild
Animals Protection Ordinance (Cap. 170);
listed as “Near Threatened” in IUCN Red List Status |
Widely
distributed in mountain streams throughout New Territories, Lantau Island and
Hong Kong Island |
Common |
|
Chinese Bullfrog Hoplobatrachus
rugulosus |
Recorded in wet abandoned agricultural habitat within Sha Lo Tung
Valley |
Class 2
Protected Animal of PRC |
Widespread
throughout the New Territories and Lantau Island |
Common |
|
Hong Kong
Cascade Frog Amolops hongkongensis |
Recorded
in stream Sha Lo Tung Valley. |
Protected
under Wild Animals Protection Ordinance
(Cap 170) |
Stream
and lowland forest |
Common |
|
Lesser Spiny Frog Paa exilispinosa |
Recorded in wet abandoned
agricultural land and Secondary Woodland within Sha Lo Tung
Valley |
listed as “Vulnerable”
in IUCN Red List Status |
Widely
distribute in mountain streams throughout Hong Kong. |
Common |
|
Common Rat Snake Ptyas mucosus |
Recorded in dry abandoned agricultural habitat within Sha Lo Tung
Valley |
Class 2
Protected animal in PRC; listed as “Endangered” in China Red Data Book |
Widespread
in Hong Kong |
Common |
|
Banded Krait Bungarus fasciatus |
Recorded in wet abandoned
agricultural land within Sha Lo Tung Valley |
listed
as “Endangered” in China Red Data Book |
Distributed
in few localities of the New Territories, Hong Kong Island and Lantau Island. |
Uncommon |
|
King Cobra Ophiophagus hannah |
Recorded in wet abandoned agricultural habitat within Sha Lo Tung
Valley |
Protected
under Protection of Endangered Species
of Animals and Plants Ordinance (Cap. 586); Listed as “Critically Endangered” in China Red Data Book; Appendix 2 of CITES |
Occurs
in a wide variety of habitats such as grassland, shrubland, open woodland and
occasionally on edge of cultivated areas and mangrove swamps. |
Uncommon |
|
Butterfly |
|
|
|
|
|
Common Birdwing Troides helena |
Recorded in secondary woodland in the
Fung Yuen Valley |
Protected
under Wild Animals Protection Ordinance
(Cap 170) and Protection of Endangered
Species of Animals and Plants Ordinance (Cap. 586); Appendix
2 of CITES |
Found in habitat where its food plant is abundant. Food
plant: Aristolochia tagala |
Uncommon
|
|
Golden Birdwing Troides aeacus |
Recorded in secondary woodland in the
Fung Yuen Valley |
Protected
under Protection of Endangered Species
of Animals and Plants Ordinance (Cap. 586). Appendix
2 of CITES |
Food
plant: Aristolochia tagala |
Uncommon |
|
Yellow Coster Acraea issoria |
Recorded in wet and dry abandoned agricultural land and secondary
woodland in the area of the Ecological Reserve |
Not
Protected |
Food
plant: Boehmeria nivea |
Rare |
|
Dragonfly |
|
|
|
|
|
Chinese Tiger Gomphidia kelloggi |
Recorded in forest stream and tall vegetation in wet abandoned
agricultural habitat within the area of the Ecological Reserve, foraging |
Not
Protected |
Found
in forest stream in Hong Kong; only known from Fujian and Hong Kong |
Rare |
|
Large Dragonhunter Sieboldius deflexus |
Exuviae found near stream in the Ecological Reserve during separate
Green Power surveys ([73]) |
Not
Protected |
Found in Tan Shan River and Tai Po She Shan; Fujian, Guangdong,
Guangxi and Hainan |
Rare |
|
White-tipped Grappletail Heliogomphus retroflexus |
Recorded near stream in the Ecological Reserve during separate Green
Power surveys ([74]) |
Not
Protected |
Found in Fujian and Taiwan |
Rare |
|
Fish |
|
|
|
|
|
Hong Kong
Paradise Fish Macropodus hongkongensis |
Recorded
in stream in the Sha Lo Tung Valley and pools in wet abandoned agricultural
land within the Sha Lo Tung Valley |
Not
protected |
Stream,
widely distributed in Hong Kong |
Uncommon |
|
Small Snakehead Channa asiatica |
Recorded
in stream in Fung Yuen and the Sha Lo Tung Valley and pools in wet abandoned
agricultural land within the Sha Lo Tung Valley |
Not
protected |
Stream,
widely distributed in Hong Kong |
Uncommon |
|
Predaceous Chub Parazacco spilurus |
Recorded
in stream in the Sha Lo Tung Valley and pools in wet abandoned agricultural
land within the Sha Lo Tung Valley |
Listed
as “Vulnerable” in China Red Data Book |
Stream,
widely distributed in Hong Kong |
Common |
|
* outside
Study Area
The Project includes three components: Ecological
Reserve, Development Site and Sha Lo Tung Road Improvement (Figure 3.1) comprising various habitats (Figure 9.9).
The Ecological Reserve covers areas within Sha Lo
Tung Valley and is considered to be of high ecological significance with
numerous species of conservation interest recorded (for details refer to Table 9.11). Habitats recorded include Fung Shui Woods,
secondary woodlands, grassland shrubland mosaic, streams, wet and dry abandoned
agricultural land, active agricultural land and developed area (abandoned
village). A small patch of wet abandoned
agricultural land was found at the northeast of the Development Site, within which
small pools and ditches were located. It
should be noted that the habitat quality within Sha Lo Tung Valley is degrading
due to threats such as use of four wheel drive vehicles, hill fires, wargames
and vegetation removal. The ecological evaluation of the
Ecological Reserve is summarized in Table
9.12.
The Development Site is situated next to the existing
Sha Lo Tung Road. Three habitat types,
including grassland shrubland mosaic (approximately
3.7 ha), secondary woodland
(approximately 0.3 ha) and developed area (approximately 0.1 ha), were recorded
within the Development Site, which comprised a total area of approximately 4.1
ha (Figure 9.10).
The building footprints (including Nature Interpretation Centre,
Multi-Cultural Education Retreat and Columbarium structures) are mainly located
on the grassy knoll which is a recognised village burial ground, subject to
hillfire disturbance and occupies approximately 1.27 ha or 31.0% of the Development
Site.
Grassland shrubland mosaic was the dominant habitat of the Development Site, which
was occupied by a number of graves and urns.
Small parcels of land lying in the lower ground to the east of the
Development Site, which had at one time been agricultural land (See Figure 3.6), were now indistinguishable from the
surrounding grassland shrubland mosaic in terms of physical appearance,
structure and species composition, due to prolonged abandonment and natural
succession. These small parcels were
therefore classified as grassland shrubland mosaic. Hill fires appear to have occurred frequently
within the grassland shrubland mosaic
making the site more grassy in nature, possibly as a result of grave sweeping
festivals. Native shrubs, fire adapted
grasses and ferns such as Aporusa dioica,
Baeckea frutescens, Miscanthus sinensis and Dicranopteris pedata were
commonly found in the grassland
shrubland mosaic.
Secondary woodland within the Development Site was
more natural and dominated by native trees Schima
superba, Schefflera heptaphylla and Ilex ficoidea. Canopy species reached a height of 8-12
m. The understorey was densely vegetated
and dominated by woody species including Litsea
rotundifolia, Psychotria rubra, the climbers Gnetum montanum and Smilax
china and the seedlings of the canopy species such as Schima superba and Schefflera
heptaphylla. The floristic diversity
of secondary woodland within the Development Site is considered high (144 plant
species recorded) and the structural complexity is considered moderate to
high.
The developed area within the Development Site
comprised Sha Lo Tung Road, concrete path and washrooms, which was a small
portion of the Development Site.
Species of conservation interest recorded within the
Development Site included bird species Greater Coucal, Lesser Coucal, Hwamei,
Savannah Nightjar and Crested Serpent Eagle (flying overhead) and the plant
species Bamboo Orchid and Willow-leaved Camellia. The ecological evaluation of the Development
Site is summarized in Table 9.12.
9.8.3
Sha Lo Tung Road Improvement
Habitats recorded along the Sha Lo Tung Road
Improvement include secondary woodland, plantation, grassland shrubland mosaic,
and developed area (Figure 9.11).
The secondary woodland along Sha Lo Tung Road was
dominated by Schima superba, a
pioneer native tree species. The
woodland was about 30 to 40 years in age, and the understorey was fairly well
developed. It was composed of diverse
tree, shrub and herb species, including Alangium
chinensis, Schefflera heptaphylla, Litsea rotundifolia, Psychotria rubra and Bidens pilosa.
Plantation was located mainly on the east side of the
road from the WSD service reservoir downhill to Ting Kok Road. Most trees were exotic species, including Acacia confusa, and Lophostemon confertus. Some
native tree, shrub and herb species had colonized the understorey, but at a
lower density and diversity than in the understorey of the native
woodland. Despite its tall canopy and
rapid growth, the plantation remains relatively simple in structure, immature
and lacks diversity.
Grassland shrubland mosaic dominated the northern
half of the road and is subject to fire damage caused by fires escaping from
many gravesites in the area. Grassland
shrubland mosaic was composed of common ferns and grasses including Dicranopteris pedata, Miscanthus floridulus and occasional scattered
trees in ravines or along the roadside such as Rhus chinensis, Schima superba and Aporosa dioica.
Developed areas include the existing Sha Lo Tung Road
and adjoining access foot paths, the WSD service reservoir, playgrounds, and
metal scrap yards near the junction at Ting Kok Road.
Species of conservation interest recorded along the
Sha Lo Tung Road included the plant species Incense Tree, Hong Kong Pavetta, Lamb
of Tartary, Cycad Fern, Common
Tutcheria and Rhodoleia; the bird
species Crested Serpent Eagle, Emerald Dove, Greater Coucal, Lesser Coucal,
Hwamei, Savannah Nightjar and a Common Buzzard flying overhead; and evidence of
the Masked Palm Civet (a mammal) (only scats found on the road).
It should be noted that the main works boundary
(refer to Figures 9.2 and 9.6) along Sha Lo Tung Road Improvement has
taken into account the potential penetration depth of soil nails within the
soil mass (underground). The
construction work activities will be restricted to the proposed road alignment,
cut slope and soil nailing, and the habitats found within those areas were
secondary woodland (approximately 0.35 ha), plantation (approximately 0.20 ha),
grassland shrubland mosaic (approximately 0.53 ha) and developed area
(approximately 1.22 ha) (Figure 9.10). The ecological evaluation of the Sha Lo Tung
Road Improvement is summarized in Table
9.12.
Table 9.12 Ecological Evaluation of Project Area
Criteria |
Ecological Reserve |
Development Site |
Sha Lo Tung Road Improvement |
Naturalness |
Secondary
woodlands were fairly natural. Grassland
shrubland mosaic under a certain degree of disturbance, due to hill fires caused
by a number of graves located within the habitats. Stream
habitats were fairly natural. Abandoned
agricultural land and developed area are man-made habitats/ intensively
modified by humans. |
Grassland
shrubland mosaic under a certain degree of disturbance, due to hill fires
caused by a number of graves located within the habitats. Secondary
woodlands were fairly natural but under threat of hill fire. Developed
areas are man-made habitats/ intensively modified by humans dominated by
native plants. |
Grassland
shrubland mosaic under a certain degree of disturbance, due to hill fires
caused by a number of graves located within the habitats Secondary woodlands
were fairly natural. . Plantation
and developed area are man-made habitats/intensively modified by humans. |
Size |
Total:
Approximately 52.5 ha. |
Total: 4.1
ha. Approximately 3.7 ha of grassland
shrubland mosaic, 0.3 ha of secondary woodland and 0.1 ha of developed area . |
Total: 2.3
ha. Approximately 0.35 ha of secondary
woodland, 0.20 ha of plantation, 0.53 ha of grassland shrubland mosaic and
1.22 ha of developed area. |
Diversity |
Overall high for
vegetation (although only 39 species found at site of temporary bridge
structure) and high for fauna |
Moderate for vegetation
(144 species) and low for fauna. |
Moderate for
vegetation (152 species) and low for fauna. |
Rarity |
The Ecological
Reserve is very unique in Hong Kong and supports a number of rare/ protected flora
and fauna, and is particularly important for odonates. |
Species of
conservation interest recorded included plant species (Willow-leaved Camellia
and Bamboo Orchid) and bird species (Hwamei, Greater
Coucal, Lesser Coucal, Savannah Nightjar and Crested Serpent Eagle [flying
overhead]). |
Species of
conservation interest recorded included plant species (Incense Tree, Hong Kong Pavetta, Lamb of Tartary, Cycad Fern, Common Tutcheria and Rhodoleia), bird species (Emerald Dove, Lesser Coucal, Greater
Coucal, Hwamei, Savannah Nightjar and Common Buzzard flying overhead) and
evidence of the mammal; Masked Palm Civet (only scats found on the
road). |
Re-creatability |
The Ecological
Reserve cannot be recreated. |
Habitat characteristics and species composition of Grassland shrubland mosaic is
re-creatable but would take time (ie 5 to 10 years) to reach maturity. Secondary woodlands are difficult to recreate. It would take more than 30 years for the
secondary woodlands to be re-created. Developed area is readily
recreatable. |
Habitat characteristics and species composition of secondary woodland
are difficult to recreate. It will
take more than 30 years for the secondary woodlands to be re-created.
Grassland shrubland mosaic are re-creatable but would take time (ie 5
years) to reach maturity. Plantation,
abandoned agricultural land and developed area are readily recreatable. |
Ecological Linkage |
The Ecological
Reserve contains the Sha Lo Tung SSSI and is linked to the Pat Sin Leng
Country Park and other natural habitats. |
Secondary woodland
and grassland shrubland mosaic are linked to the highly valued habitats of
Sha Lo Tung SSSI and Pat Sin Leng Country Park respectively. |
Secondary woodland
and grassland shrubland mosaic are linked to the highly valued habitats of
Fung Yuen Valley SSSI and Pat Sin Leng Country Park. |
Fragmentation |
Not fragmented |
Not
fragmented |
Not
fragmented. |
Potential Value |
High. Habitat quality
of the Ecological Reserve is degrading due to threats such as use of four
wheel drive vehicles, hill fires, wargames and vegetation removal. The ecological value can be preserved and
enhanced through the implementation of the Project. |
Moderate. |
Moderate. |
Nursery/Breeding
Ground |
Significant
breeding ground for odonates. Possible
breeding ground for the Hong Kong Paradise Fish. |
No significant
breeding ground recorded. |
No significant
breeding ground recorded. |
Age |
Sha Lo Tung Valley
and the area contained by the Ecological Reserve has a long history of human
settlement (over 300 years). |
Mature for
secondary woodland. Young for
grassland shrubland mosaic,. Negligible for
developed area. |
Mature for
secondary woodland. Moderate for plantation Young for
grassland shrubland mosaic. Negligible
for developed area. |
Abundance/Richness
of Wildlife |
Abundance of fauna
was high. |
Abundance of fauna
was low. |
Abundance of fauna
was low to moderate. |
Overall Ecological Importance |
The Ecological Reserve has
high ecological and conservation significance as a whole. |
Moderate to high for secondary woodland. Low to moderate for grassland shrubland mosaic. Negligible for Developed Area. |
Moderate to high for secondary woodland. Low for plantation.
Low to moderate for grassland shrubland mosaic. Negligible for Developed Area. |
9.9
Terrestrial
Ecological Impact Assessment and Evaluation
The potential impacts due to the construction
and operation of the Project, are assessed (following the EIAO-TM Annex 16 guidelines) in the following sections, and the
impacts evaluated (based on the criteria in EIAO-TM
Annex 8).
9.9.1
Potential Sources of Impact
The enhancement works for the
establishment of the Ecological Reserve will include installation of a drop bar
at the road entrance to Sha Lo Tung Valley, weed removal, enhancement planting,
wet farmland restoration, woodland planting and trail maintenance. These works will be carried out with hand
tools. A drop bar will be installed at
the road entrance to Sha Lo Tung Valley to prevent vehicular access to the Ecological
Reserve, but no restriction for the access of walkers/ Country Park visitors/
villagers. The drop bar will be located
outside Sha Lo Tung SSSI and CA zone and the exact location will require
approval from the relevant authorities.
No major excavation works and construction works will be required for
this part of the enhancement works and no adverse ecological impact is
anticipated.
In addition to the enhancement works
mentioned above, there will be some works within the Ecological Reserve
associated with fencing at Lei Uk to protect the public from collapsed,
dilapidated and unstable structures:
·
In view of public safety there will be
permanent fencing installed along the western edge of Lei Uk adjacent to the footpath (Figure 3.3). Minimal soil excavation for the posts and
fence installation will be anticipated and all of the works will be undertaken
by hand tools.
·
A temporary footbridge across the Sha Lo
Tung SSSI Steam to Lei Uk will be built (Figure 3.4)
during the building of the fence and allow import and export of materials to
and from the fencing work site. The
temporary footbridge will provide a defined, set route across the stream and
prevent multiple crossing points being used by workers when accessing Lei Uk to
undertake the fencing work. It will
therefore minimise disturbance to the surrounding ecologically sensitive areas
including the SSSI. The footbridge will
mainly be made of wooden materials to match the existing environment, with
small concrete footings (Figure 3.5).
Construction materials including prefabricated timber sections will be
transported near the site and hand carried to the proposed site for in-situ assembling
on site. There will be no stockpiling of
materials at the site of temporary footbridge.
Construction of the bridge footings will involve minor excavation
(dimensions of 500mm (height) x 500mm (length)). The footings will be away from the stream and
avoid dense vegetated areas as far as practicable. The raw materials for the footings
will be hand carried to the locations and mixed in-situ where concrete is
placed. Care will be taken to isolate
the mixed material so there is no contamination of the stream. The
temporary footbridge will be removed manually after the erection of fencing
around Lei Uk. All of the footbridge
works will be implemented using hand tools during the dry season (November to
March) only.
·
Minor improvements such as vegetation
removal may be made to certain sections of the existing footpath to Lei
Uk. To facilitate the transportation of
the construction materials, temporary access in the form of metal scaffolding
may be formed on the areas near both sides of the existing stream where there
is level difference. The extent of the
temporary metal scaffolding will be confirmed on site. No vehicles except buggies for transportation
of materials would be allowed within the valley.
Development Site
It is estimated that the major
construction activities within the Development Site may include site formation,
excavation, foundation, superstructure and building construction, landscaping,
slope stabilisation and E&M work.
Only small construction plants will be required and no demolition work
is required. Therefore, potential
sources of ecological impacts associated with the construction of the
Development Site comprise:
·
Direct habitat and vegetation (in
particular the plant species of conservation interest listed in Table 9.11) loss and habitat
fragmentation resulting from land take for the development and associated
facilities;
·
Direct loss of inactive/less
mobile/habitat-specific wildlife nesting/inhabiting the affected area;
·
Construction runoff may lead to
deterioration of the water quality of the Sha Lo Tung perennial streams and the
Sha Lo Tung SSSI (which are important odonate and fish habitats and of
ecological significance) and threaten the survival of the stream fauna in
particular the larval stage of the odonate community, other stream macroinvertebrates and
freshwater fish (for detailed water quality impact assessment refer to Section 6);
·
Potential risk of landslides at the
Development Site due to heavy rainstorms, which may impact the perennial stream
habitats of the Sha Lo Tung SSSI and affect the associated stream fauna;
·
Associated potential impacts to wildlife
(in particular the wildlife species of conservation interest listed in Table 9.11), including restriction of
wildlife utilisation of the area (ie, transit, feeding and roosting) and
degradation of habitat quality/ ecological function as a result of permanent
loss, isolation and fragmentation of ecological habitat; and
·
Potential impacts to the surrounding
habitats and ecologically sensitive areas including Country Park, SSSIs,
Conservation Area and natural streams, and associated wildlife due to physical
disturbance of this habitat including noise, increased human activity or hill
fire.
Sha Lo Tung Road
The improvement of Sha Lo Tung Road (mainly widening
of existing alignment) will cause similar potential ecological impacts to those
identified for the Development Site.
Since the majority of Sha Lo Tung Road is located away from Sha Lo Tung
Valley and ecologically important streams, it is expected that the impacts
would be less severe compared with the construction activities of the
Development Site. Soil nailing, if
required to stabilise slopes particularly downhill, can be implemented
carefully to avoid damage to trees and the slope surface can be planted to
maintain a green landscape after the improvement works are finished. In cases where the road platform requires
stabilising downhill from the road, soil-nailing can be installed carefully to
avoid existing trees and therefore introducing limited disturbance to the
existing soil and vegetation on the surface.
Therefore the impact is expected to be temporary and limited disturbance
on the secondary woodland, and the finished slope surface can be reinstated or
planted for landscaping purpose.
·
Potential impacts to the surrounding
habitats and ecologically sensitive areas including the Ecological Reserve/ Sha
Lo Tung Valley, Country Park and SSSIs, and associated wildlife due to
increased human activities and disturbance (ie potential risk of landslide and hill
fire, increase of lighting source, increase in traffic at the Sha Lo Tung Road)
associated with the operation of the Nature Interpretation Centre,
Multi-Cultural Education Retreat cum Columbarium and Sha Lo Tung Road;
·
Surface runoff and drainage from the Development Site
and the improved Sha Lo Tung Road (detailed
drainage and sewerage impact assessment refer to Annex C and Section 7 respectively); and
·
Potential
ecological impacts due to the operation (eg guided tours, organic paddy farming and vandalism) and associated
maintenance work (eg removal of
weeds, footpath maintenance etc) of the Ecological Reserve.
9.9.2
Assessment of Ecological Impacts
Due to the sensitivity of Sha Lo Tung Valley in which
the Ecological Reserve lies, the proposed action plan and enhancement works
should be approved by the Government statutory fund and relevant government
departments including AFCD and will be implemented progressively. Each component of the action plan and
enhancement works will be carefully designed and preferably will have trials
before full implementation. Ecological
review of the effectiveness of the components will also be undertaken annually
in order to avoid any negative ecological effects.
Construction Phase
All of the action plan elements will be implemented
using hand tools where practicable.
Should any machinery be required within the Ecological Reserve, prior
approval from the relevant authorities is required. It should also be noted that scientific
information and field experience would be accumulated during the early stage of
the Project and it would enable more effective planning and implementation of
any conservation interventions.
The works associated with the fencing at Lei Uk,
construction and removal of the temporary footbridge and minor improvement of
the existing new footpath to Lei Uk are all small scale. In addition with the commitment that all
works will be conducted using hand tools during day-time
in the dry season, construction
materials for the temporary footbridge will only be brought onsite for
immediate use (ie no stockpiling onsite) and small quantity of concrete will be
mixed in-situ as well, only limited vegetation (along the western edge of Lei Uk
adjacent to the footpath, stream
bank at the temporary footbridge location and along existing
footpath to Lei Uk) will be
disturbed. The
footings will be away from the stream and avoid dense vegetated areas as far as
practicable. Therefore, no adverse ecological impact is
anticipated. It has been confirmed that
no plant species of conservation interest were recorded within the potential
disturbed areas. Unacceptable impacts on
the faunal species of conservation interest recorded within the Ecological
Reserve are therefore not expected in association with the fencing at Lei Uk,
construction and removal of the temporary footbridge and the minor improvement
of the existing footpath to Lei Uk.
Operational Phase
The destructive activities such as use
of four wheel drive vehicles, hill fires, wargames and vegetation removal are
controlled further to the development of the Ecological Reserve and
implementation of the Conservation Management Plan (CMP). Operational phase impacts to terrestrial
ecology in the Ecological Reserve, may arise from increased human activities in
the area resulting in disturbance to the surrounding habitats and associated
wildlife, if uncontrolled. The attracted
visitors to the Ecological Reserve are expected to come to enjoy and appreciate
the nature and uniqueness of Sha Lo Tung Valley, and will be willing to follow
the Ecological Reserve regulations. Trail
enhancement, provision of signage and guided tours (provided by the Green
Power/ Nature Interpretation Centre), as proposed under CMP, the human
activities and disturbance can largely be controlled/ managed and no
unacceptable ecological impacts will be anticipated.
Routine management work carried out
during the operational phase, including removal of weeds, would have positive
impacts to the habitats on site.
Footpath maintenance (by manual works with stones and weeding, or by
small-scale machines) would also have minimal impacts on the surrounding habitats.
In terms of future number of visitors
to or via the Ecological Reserve it is anticipated that visitors bypassing the
site would be similar to the existing condition, although public access cannot
be strictly controlled unless a permitting system is set up. Two group guided tours/day, each group of 40
people, will be organised by the Nature Interpretation Centre and this is
not anticipated to cause any ecological impact.
In addition, access of only major trails will be maintained for the
public to other parts of the countryside via the Ecological Reserve, while
other paths to streams, woodland and sensitive areas would have restricted
access (by gate, signage, planting). In
conjunction with staff patrolling (eg for vandalism) and monitoring, potential impacts
due to visitors are not anticipated.
All visitors to the Ecological
Reserve will be required to observe certain standards of behaviour and
sufficient on-site staff will be provided to monitor such behaviour, in
particular during festival periods. The
setting up of the Ecological Reserve is expected to facilitate the enhancement
of public education on appropriate behaviour when caring for natural
resources. During festival days, number
of casual visitors may increase significantly.
The Development Site will have ample space for visitors (to Columbarium)
to relax without having to “spill over” to the Ecological Reserve. With the provision of sufficient
Conservation Ambassadors (eg 30 people, organised by Green Power), who will
serve as reserve guards to control, advise and educate visitors on the
regulations in the Ecological Reserve, human activities and disturbance will be
largely controlled. The Nature
Interpretation Centre will also be closed during festival days to avoid
attracting large crowds to the Ecological Reserve, although the Ecological
Reserve itself will remain open throughout the year.
With the implementation of
the Sha Lo Tung Conservation Management Plan (Annex A1) as proposed in the Pilot Project for PPP Scheme within the Sha Lo Tung
Valley, human disturbance such as hill fire will be largely reduced/
controlled, habitat quality will be enhanced, and the ecological resources and
conditions of the valley will be conserved and enhanced. It should also be noted that no unacceptable
impacts expect to be anticipated due to the implementation of the CMP (detailed
refer to Section 5.2 of Annex A1). As a consequence, the
development of the Ecological Reserve is expected to realize a significant
ecological gain over time to the Sha Lo Tung Valley.
Development
Site
Pat Sin Leng Country Park, Conservation Area, Fung
Yuen Valley SSSI and Sha Lo Tung Valley including the SSSI and streams will not
be directly affected by the development.
The potential ecological impacts to the Development Site during the
construction phase will be:
·
Permanent loss of secondary woodland
(approximately 0.025 ha), grassland shrubland mosaic (approximately 1.54 ha),
and developed area (approximately 0.06 ha) due to the construction of the
Nature Interpretation Centre, Multi-Cultural Education Retreat cum Columbarium,
and associated facilities including car park, staff quarters and footpaths (Table 9.13). The habitat loss includes temporary access
road and part of the Sha Lo Tung Road improvement which is located within the
Development Site boundary; and
·
Temporary loss of grassland shrubland
mosaic (approximately 0.16 ha) due to the cut slope and site formation within the
Development Site (Table 9.13); and
·
Potential loss of plant species of
conservation interest, Willow-leaved
Camellia and Bamboo Orchid (Table
9.14). Indian Birthwort Aristolochia tagala and Hance’s Viburnum Viburnum hanceanum were not recorded within the
Development Site, both of which are plant species of conservation interest.
Table 9.13 Overall Habitat Loss due to the
Development including the Development Site and Sha Lo Tung Road Improvement
Impacted Habitat |
Permanent Loss due to the Development Site (ha) |
Temporary Loss due the Development Site (ha) |
Permanent Loss due to the Sha Lo Tung Road improvement (ha) |
Ecological Importance of the Affected Habitats |
||
Soil Nailing |
Road Alignment |
Cut Slope |
||||
Secondary Woodland |
0.025 |
0 |
0 |
0.17 |
0.03 |
Moderate to high |
Plantation |
0 |
0 |
0 |
0.24 |
0.19 |
Low |
Grassland Shrubland Mosaic |
1.54 |
0.16 |
0. |
0.45 |
0.2 |
Low to Moderate |
Developed Area |
0.06 |
0 |
0 |
1.03 |
0.05 |
Negligible |
TOTAL |
1.625 |
0.16 |
0 |
1.89 |
0.47 |
|
Notes: ·
The building structures are mainly located on the grassy knoll
which is recognised village burial ground and subject to hillfire
disturbance. ·
Permanent loss within the Development Site mainly due to
land take for the land formation including areas for site office and
stockpile), building structures, cut slope and sitting out areas, as well as
the proposed landscape hardworks. The
habitat loss includes part of the Sha Lo Tung Road improvement (developed
area) which is located within the Development Site boundary. ·
The land take for the development including the main
buildings (Nature Interpretation Centre, Multi-Cultural Education Retreat and
Columbarium structures, car park and major paths connecting all buildings and
landscape areas (ie pavilion and gathering area) only occupies approximately
1.625 ha or 39.6% of the Development Site.
About 0.16 ha of the cut slope areas will be reinstated after
construction. ·
Soil nailing is expected to be of limited disturbance to
the habitat, in which soil nails will be inserted to stabilise the existing
slope and no shotcreting work will be conducted after the soil nailing
work. Habitat loss due to soil nailing
is not expected. ·
Enhancement planting may be proposed in the remaining
grassland shrubland mosaic habitat within the Development Site, subject to
recommendations in Section 10 |
Associated Impacts to
Wildlife, in particular Species of Conservation Interest
In view of the generally poor vegetation cover and
human disturbance (hill fire and grave sweeping) of the site, it is believed that
the Development Site does not provide optimal habitats for most of the recorded
species of conservation interest in Sha Lo Tung Valley as listed in Table 9.11. The Savannah Nightjar (a rare bird in Hong
Kong and like all birds in Hong Kong, protected under WAPO Cap 170) was recorded in the grassland shrubland mosaic of the
Development Site. Although approximately
1.54 ha (or even more grassland shrubland mosaic habitat used for enhancement
planting) of this habitat will be permanently lost for the project (see Table 9.13) there is extensive similar
habitat in the near vicinity (ie >200ha) and being very mobile, this species
should not be impacted. The Savannah
Nightjar is not restricted to grassland shrubland mosaic; it was recorded in
the dry abandoned agricultural land of the Ecological Reserve, a habitat that
is extensive and not impacted by the Project.
Impact on the Large Grass Warbler (protected under WAPO Cap 170 in Hong Kong, near
threatened in IUCN Red List) is also not
anticipated. Although it has previously
been recorded in Sha Lo Tung, it was not recorded throughout the Study Area
during the ecological surveys for this EIA.
Although a small part
of this species’s associated habitat (grassland shrubland mosaic) will be
affected (see Table 9.13)), there is extensive similar habitat nearby. Finally, Large Grass Warblers typically breed
in grassland habitat above 500m, and both the Development Site and Sha Lo Tung
Valley lie below 220m. Potential impacts on faunal
species of conservation interest are summarized in Table 9.14.
Although there is potential loss of perching sites, foraging and feeding
grounds for wildlife it is anticipated that the construction of the Nature
Interpretation Centre and Multi-Cultural Education Retreat cum Columbarium will
not cause any significant adverse impacts to any species of conservation
interest, given that extensive similar natural habitats are available in close
proximity particularly after the preservation of the Ecological Reserve. However, any uncontrolled construction runoff
and wastewater may affect the Three-banded Box Terrapin
(recorded previously but not in the ecological surveys for this EIA), Hong Kong
Cascade Frog, Hong Kong Paradise Fish, Small Snakehead, Predaceous Chub and
dragonfly larvae, as well as other macroinvertebrates, in the Sha Lo Tung
Streams. Such impacts will be discussed
in the following section.
Table 9.14 Impacts on Faunal
and Flora Species of Conservation Interests due to the Development including
the Development Site and Sha Lo Tung Road Improvement
Species of Conservation Interest |
Impacts |
Location |
Birds |
|
|
Common Buzzard (protected under WAPO Cap 170 and Cap 586
in Hong Kong, Class 2 Protected
Animal in PRC, Appendix 2 of CITES. |
A small part of their associated habitat (ie
perching/ foraging) will be affected; there are extensive similar habitats in
proximity. |
Flying over grassland shrubland mosaic of the Sha Lo
Tung road. |
Crested Serpent Eagle (protected under WAPO Cap 170 and
Cap 586 in Hong Kong, Class 2
Protected Animal in PRC, China Red Data
Book status – Vulnerable) |
A small part of their associated habitat (ie
perching/ foraging) will be affected; there are extensive similar habitats in
proximity. |
Flying over grassland shrubland mosaic of
Development Site and in plantation of Sha Lo Tung Road |
Lesser Coucal (protected
under WAPO Cap 170 in Hong Kong, Class
2 Protected Animal in PRC, China
Red Data Book status – Vulnerable)) |
A small part of their associated habitat (ie
perching/ foraging) will be affected; there are extensive similar habitats in
proximity. |
Grassland shrubland mosaic of Development Site and
Sha Lo Tung Road |
Greater Coucal (protected
under WAPO Cap 170 in Hong Kong, Class
2 Protected Animal in PRC, China
Red Data Book status – Vulnerable) |
A small part of their associated habitat (ie
perching/ foraging) will be affected; there are extensive similar habitats in
proximity. |
Grassland shrubland mosaic of Development Site and
plantation of Sha Lo Tung Road |
Emerald Dove (protected under WAPO Cap 170 in Hong Kong, China Red Data Book status –
Vulnerable) |
A small part of their associated habitat (ie
perching/ foraging) will be affected; there are extensive similar habitats in
proximity. |
Secondary woodland of Sha Lo Tung Road |
Hwamei (protected under WAPO Cap 170 in Hong Kong, Appendix 2 of CITES) |
A small part of their associated habitat (ie perching/
foraging) will be affected; there are extensive similar habitats in
proximity. |
Grassland shrubland mosaic and secondary woodland of
both Development Site and Sha Lo Tung Road |
Savannah Nightjar (protected under WAPO Cap 170 in Hong
Kong, rare in Hong Kong) |
A small part of their associated habitat (ie
resting/ foraging) will be affected; there are extensive similar habitats in
proximity. |
Recorded in grassland shrubland
mosaic of Development Site and resting on the Sha Lo Tung road (developed
area). (Also found in dry
abandoned agricultural land in the Ecological Reserve) |
Large Grass Warbler (protected under WAPO Cap 170 in Hong
Kong, near threatened in IUCN Red List) |
A small part of their associated habitat (ie
resting/ foraging) will be affected; there are extensive similar habitats in
proximity. Both the Development Site
and Sha Lo Tung Valley lie below 220m, which is far lower than the typical
grassland habitat the Large Grass Warbler utilises for breeding (above 500m). |
Previously recorded in Sha Lo Tung
but not recorded in the ecological surveys.
Widely
distributed in montane grassland throughout Hong Kong |
Other bird species of conservation interest including
Crested Goshawk, Black Kite, Yellow-breasted Bunting, Kestrel (Common/Eurasian
Kestrel), Slaty-legged Crake, Asian Barred Owlet / Cuckoo Owl and Collared
Scops Owl |
Potential loss of a small part of their associated
habitat (ie resting/ foraging); there are extensive similar habitats in
proximity. |
Recorded within the Study Area but not the project
area |
Herpetofauna |
|
|
Chinese Bullfrog |
None of their associated habitat will be directly
affected; there are extensive similar habitats in proximity. |
Pools in wet abandoned agricultural land and woodland
at the northeast of the Development Site |
Lesser
Spiny Frog |
None of their associated habitat will be directly
affected; there are extensive similar habitats in proximity. |
Pools in wet abandoned agricultural land and
woodland at the northeast of the Development Site |
Fish |
|
|
Hong Kong Paradise Fish (uncommon species) |
None of their associated habitat will be directly
affected; there are extensive similar habitats in proximity. |
Pools in wet abandoned agricultural land at the northeast
of the Development Site |
Small Snakehead (uncommon species) |
None of their associated habitat will be directly
affected; there are extensive similar habitats in proximity. |
Pools in wet abandoned agricultural land at the northeast
of the Development Site |
Predaceous Chub (China
Red Data Book status – Vulnerable) |
None of their associated habitat will be directly
affected; there are extensive similar habitats in proximity. |
Pools in wet abandoned agricultural land at the
northeast of the Development Site |
Odonates -
Dragonflies |
|
|
Chinese Tiger (Gomphidae family) (uncommon species) |
It should be noted that none of these three
dragonflies were recorded within the main works area (development site and Sha
Lo Tung road improvement site) but this species and other members of the
Gomphidae family like to perch on tree tops and therefore the minor impacts
on the woodland within the Development Site and next to Sha Lo Tung Stream
may cause potential loss of their habitat. A small part of their associated habitat (tree top
for perching) will be affected; there are extensive similar habitats in
proximity. |
Secondary woodland stream and wet abandoned
agricultural land within the Ecological Reserve |
Large Dragonhunter (Gomphidae family) (rare species) |
Exuviae found near perennial stream in the
Ecological Reserve |
|
White-tipped Grappletail (Gomphidae family) (rare species) |
Recorded near stream flowing through wet abandoned agricultural
land in the Ecological Reserve |
|
Mammals |
|
|
Masked Palm Civet |
A small part of their associated habitat (trees for
sleeping and woodland for foraging) will be affected’ there are extensive
similar habitats in proximity. |
Scat found on Sha Lo Tung Road |
Flora |
|
|
Common Tutcheria |
Potential loss of the plant species might be avoided
through proper design of the the road or transplantation. |
In secondary woodland within the Sha Lo Tung Valley and
in plantation along the existing Sha Lo Tung Road. |
Lamb of Tartary |
Potential loss of the plant species might be avoided
through proper design of the the road or transplantation. |
In woodland, along stream and wet abandoned
agricultural land, all in Sha Lo Tung Valley; and also in woodland along the
existing Sha Lo Tung Road |
Willow-leaved Camellia |
Potential loss of the plant species might be avoided
through proper design of the development or transplantation. |
In woodland in the Sha Lo Tung Valley and within the
secondary woodland of the Development Site |
Bamboo Orchid. |
Potential loss of the plant species might be avoided
through proper design of the development or transplantation. |
In grassland shrubland mosaic of the Development
Site |
Incense Tree |
Potential loss of the plant species might be avoided
through proper design of the road or transplantation. |
In secondary woodland along the existing Sha Lo Tung
Road. |
Hong Kong Pavetta |
Potential loss of the plant species might be avoided
through proper design of the road or transplantation. |
In secondary woodland along the existing Sha Lo Tung
Road. |
Rhodoleia |
Potential loss of the plant species might be avoided
through proper design of the road or transplantation. |
In plantation along the existing Sha Lo Tung Road. |
Cycad Fern |
Potential loss of the plant species might be avoided
through proper design of the road or transplantation. |
In grassland shrubland mosaic and on existing Sha Lo
Tung road |
Habitat Fragmentation and Isolation
Habitat fragmentation and isolation is expected to be
low to moderate in the Development Site as the affected habitats are located at
the entrance of Sha Lo Tung Valley and upland areas are small in size and are
already subject to disturbance due to hill fire. Additionally most of the surrounding natural
and undisturbed habitats within the Pat Sin Leng Country Park, Conservation
Area, Sha Lo Tung SSSI and Sha Lo Tung Valley will remain untouched. With provision of tree/ shrub plantings,
impacts due to habitat fragmentation and isolation will further be reduced.
Runoff and drainage from construction within the Development
Site may contain considerable loads of suspended solids and contaminants. Potential sources of water pollution from
site runoff include:
·
Runoff and erosion of exposed bare soil and earth,
drainage channels and stockpiles;
·
Uncontrolled discharge of wastewater generated from
concrete washing and sewage generated from on-site work force;
·
Release of cement materials with rain wash;
·
Wash water from dust suppression sprays and vehicle
wheel washing facilities; and
·
Fuel, oil, and lubricant from maintenance of
construction vehicles and mechanical equipment.
Local water pollution could be
substantial if the construction site runoff is allowed to drain into the nearby
perennial streams at Sha Lo Tung SSSI, the wet
abandoned agricultural land, storm drain and/ or natural drainage without
mitigation. The wastewater from the
above washing activities, particularly concrete washing, may contain high
levels of suspended solids and high pH value.
Direct discharge of such wastewater would have potential impacts to the
water quality of the nearby Water Sensitive Receivers (WSRs) located below the
Development Site, in particular Sha Lo Tung streams. The Sha Lo Tung streams are recognised as an
important habitat for dragonflies and dragonfly larvae as well as fish of
conservation interest (eg Hong Kong Paradise Fish, Predacious Chub, Small
Snakehead) and due to the ecological importance and sensitivity of the Sha Lo
Tung streams, any discharge of the construction runoff and wastewater may
threaten the survival of the stream fauna in particular the larval stage of the
dragonfly communities and cause irreversible ecological impacts.
The ecological impacts and effects
on water quality from the construction activities will be controlled, provided
that major earthworks are scheduled in the dry season, a well designed
temporary drainage system (including
catchpits and drainage pipes to direct the hinterland surface runoff without
flowing across the site and resulting in any contamination due to site
activities) is installed, a 20 m building buffer from Sha Lo Tung SSSI is
maintained, a phased schedule and good construction practices are implemented
(refer to Sections 3 & 6).
In accordance with Section 9.1 of the Technical Memorandum of Standards for Effluent Discharged into Drainage
and Sewerage Systems, Inland and Coastal Waters, no treated effluent is
allowed to be discharged within 100 m of the landward boundaries of a site of
SSSI. Portable chemical toilets will be
deployed for the site workers at a location away from the SSSI as much as
possible; these will be surrounded by temporary interceptor drains and
appropriately mounted, and a licensed contractor will be appointed for
appropriate maintenance of these facilities and disposal of waste (by replacing the
used portable chemical toilets and no on site cleansing to be allowed) will be
provided for the site workers. Thus, as
there will be no discharge of treated or untreated sewage on site, the impacts
on ecological sensitive receivers through changes in water quality from
domestic sewage effluent are likely to be minimal.
Change in Hydrology and Flow Regime
The overall design philosophy for the stormwater
drainage is to retain the rainfall-runoff response as close to the existing
regime as possible to minimise impacts.
During the construction phase, surface runoff will be
collected by the proposed drainage system at the Site and will then be
discharged into the existing drainage system at Ting Kok Road via the proposed
drains at Sha Lo Tung Road.
Calculations are presented in Annex C that consider the overall site as a series of discrete
elements. The total area of water
catchment land draining into the Sha Lo Tung Valley stream system upstream of,
and including the Development Site area, is shown in Figure 3.1 of Annex C and is estimated
to be approximately 39.9 ha. When one
examines the land classification for this area only about 1.625 ha of this
represents flow through areas of proposed development comprising paved surfaces
and buildings with rooftop gardens. This
represents only approximately 4.07% of the area contributing flow into the Sha
Lo Tung stream at the location of the development and only 0.29% of the total
land area draining into the Sha Lo Tung stream system upstream of the Hok Tau
Reservoir which is in the region of 555 ha.
Secondary impacts to the surrounding
habitats, in particular the Sha Lo Tung Valley, secondary woodlands, natural
perennial streams at Sha Lo Tung SSSI, Conservation Area and Pat Sin Leng
Country Park and associated wildlife may arise from increased noise impact,
human activities, disturbance and potential risk of landslides at the
development site due to heavy rainstorms.
The impacts arising from increased noise impact, human activities and
disturbance are expected to be low to moderate owing to the temporary nature
and relatively small scale of the construction works (earthworks undertaken
only during the dry season when heavy rainstorms are not expected). Following the geotechnical
standard criteria in design of temporary works and provision of measures to
increase robustness of slopeworks during construction within the development
site, risk of landslip within the site can be largely reduced and thus pose
minimal impact to the adjacent ecological sensitive streams (for further
details refer to Section 3.4.9). Environmental management measures and regular checks
on construction boundaries will be conducted.
Impacts to ecological resources are not predicted to be unacceptable.
Cumulative Impacts
The Fung Yuen Residential Development and associated
road works are currently ongoing. The
project works fall within the Study Area but are expected to be completed when
the current Project construction works commences and therefore no concurrent
projects are anticipated.
It should also be noted that the
existing Sha Lo Tung Road has to be improved before the construction activities
of the Development can commence and therefore these would be undertaken in
sequence and not concurrently.
The overall design philosophy for the stormwater
drainage is to retain the rainfall-runoff response as close to the existing
regime as possible to minimise impacts.
There is currently no structured drainage provision within the
Development Site or for Sha Lo Tung Road.
The improved Sha Lo Tung Road and car park within the Development Site
will be kerbed and will have back of kerb filter drains, trapped road gullys
and a piped stormwater system. This will
discharge run-off to a pumping station located beneath the car park area with
all flows being discharged back over the crest of the access road and into the
structured road drainage to be provided as part of the road improvements. The pumping station pumps and wet well will
be sized to control the rate of discharge from the development vehicular zone
such that the road drainage system will not be overloaded. Removing the upgraded Sha Lo Tung Road and
car park runoff from the Development Site will not only eliminate the risk of
oil leakage spillage contaminating the natural stream courses it will also
offset the potential for increased runoff from the proposed Development Site
and therefore maintain the hydrological balance of the Sha Lo Tung stream
system.
For non-vehicular development areas porous or semi
permeable paved surfaces will be used in association with grassed swales and
soakaways to attenuate run-off. Terraced
construction will control the rate of surface runoff with catchpits providing
oxygenation and solids removal at the steps formed. The run-off from the development
non-vehicular zone will be routed to pass through grit separators beneath the
proposed car park to remove sediments associated with “first flush” flow.
To ensure water quality objective are met and
consequential ecological impacts are minimised, all surface run-off from the
improved Sha Lo Tung Road and car park within the Development Site will be
pumped off site with no interaction with the existing stream system (see also Change in Hydrology and Flow Regime).
To the extent practical, structures will
utilise appropriate design to complement the surrounding landscape. Materials and finishes will be considered
during detailed design (eg finishing of the building surfaces will be in
non-reflective, subdued colours to match the surrounding natural environment). There will be minimal public areas lighting
and the major lighting sources will be pointed inward and downwards, and
non-essential lighting will also be switched off in the middle of the night to
avoid disturbance to wildlife. The
in-residence training in the Multi-Cultural Education Retreat requires a
tranquil environment and will have no activities at night time. Minimal lighting will be expected during the
operation of the Multi-Cultural Education Retreat cum Columbarium.
Application
of pesticides, insecticides and normal chemical fertilizers for the landscaping
purposes and vegetation maintenance will be prohibited during operation of the
Development Site. Should organic
fertilizers or slow release chemical fertilizers be required for encouraging
the growth of planted vegetation, prior approval from EPD and AFCD will be
required. Ecological and water quality
impacts to the downstream wetland habitats are not anticipated in the
Development Site.
Accidental hillfire is expected to
be minimal as no burning of effigies and paper offerings will be allowed at the
Multi-Cultural Education Retreat cum Columbarium. A Quick Fire Response Team will be set up
during the operation of the Multi-Cultural Education Retreat cum Columbarium
and it should also be noted that emergency access for fire engines
will be available after the improvement of Sha Lo Tung Road has been completed.
Under the
Sha Lo Tung pilot project, an aggressive fire-suppression programme will be
implemented to prevent the occurrence of hill fires. Disturbance due to hillfire, visitors and
vandalism would be controlled by pro-active management, including patrolling
and conservation education.
Increased Human Activities and
Disturbance
As discussed previously for the
Ecological Reserve, the destructive activities such as use of
four wheel drive vehicles, hill fires, wargames and vegetation removal, which
could also affect the Development Site, are controlled further to the
development of the Ecological Reserve and implementation of the Conservation
Management Plan (CMP).
Special traffic arrangements will be
implemented during important Festivals (ie Ching Ming
or Chung Yeung) to control the number of vehicles and people to the
Development Site. Buyers of Class A
niches (20,000) might visit the Columbarium at any time but prior booking would
be required during festival days. Access
to the Development Site by vehicle during festival days would be limited to
shuttle coach services provided by the SLTDC.
Only eligible ticket holders with prior booking would be allowed to take
the shuttle. Buyers of Class B niches
(40,000) would not be allowed to visit the Columbarium during the festival
days. Control points would be set up and
visitors who walk up the SLT Road without valid tickets would not be allowed to
enter the Columbarium. Sufficient staff
would be deployed by the SLTDC in the Columbarium for crowd control
purpose. It should be noted that the above arrangement only
applies to visitors to columbarium, visitors to the trails and Country Park
will not be affected.
The direct disturbance of natural
habitats and wildlife due to increased human activities of the Multi-Cultural
Education Retreat cum Columbarium is expected to be minimal as Sha Lo Tung
Valley will be properly managed under the proposed Pilot Project for PPP
Scheme, human activities (ie grave sweeping) will be restricted to within the
Development Site, and no burning of effigies and paper offerings will be
allowed. In addition the Development
Site will have ample space for visitors to relax without having to “spill over”
to the natural habitats.
Risks of Landslides during the
Operation Phase
It is expected that where existing slopes within the
Development Site are found to be below current safety standards, they are
recommended for upgrading works that should have involved careful assessment of
the geological and groundwater condition, likely modes of failure and detailed
design in accordance with relevant Practice Note for Authorized Persons (PNAP)
and Geotechnical Manual for Slopes with adopting a minimum factor of safety of
1.4 for these engineered slopes. With
doing this, the landslide risk during operation phase could be remained at a low
level and is well above the threshold safety standard.
Proper maintenance prevents the deterioration of
slopes within the site. In addition to
regular maintenance during operation, routine inspections by a chartered
engineer and enhanced maintenance using prescriptive measures (GEO Report No.
56) as appropriate shall be carried out to achieve quick improvement to the
stability of existing non-engineered slopes within the development site. The
frequency of these routine inspections shall make reference to Geoguide 5:
Guide to Slope Maintenance.
During occupation of the development buildings the
risk of landslide should be very low and can effectively be reduced by good
design and construction of slopeworks as well as its proper maintenance.
Change in Hydrology and Flow Regime
As stated previously the overall design philosophy
for stormwater drainage is to retain the rainfall run-off response as close as
possible to the existing regime thereby minimizing impact. In this context it is worth noting that the
total area of water catchment land draining into the Sha Lo Tung Valley stream
system upstream of, and including the Development Site area, is approximately
39.9 ha. When one examines the land
classification for this area only about 1.625 ha of this represents flow
through areas of proposed development comprising paved surfaces and buildings
with rooftop gardens. This represents
only 4.07% of the area contributing flow into the Sha Lo Tung stream at the
location of the development and only 0.29% of the total land area draining into
the Sha Lo Tung stream system upstream of the Hok Tau Reservoir which is in the
region of 555 ha.
The detailed approach presented in Appendix C determines separate natural
catchment areas that are within and/or affected by the proposed
development. After identifying the
sub-divisions in the natural topography based on their drainage characteristics
it is possible to develop mitigation measures to minimize the impact of the
development on the existing drainage system and in particular the discharge
into Sha Lo Tung Stream. The approach to
drainage impact mitigation measures has an overriding objective to retain and
maintain the existing quality and quantity of water flow into the natural
stream systems as well as the wet abandoned agricultural land downstream of the
Development Site. In doing so it is
intended to draw clear distinctions between the following run-off and drainage
circumstances:
·
Development
Site subject to vehicular traffic (“development vehicular zones”) – where the
run-off will be collected using back of kerb filter drains, trapped road gullys
and a piped stormwater system. This will
discharge run-off to a pumping station located beneath the car park area with
all flows being discharged back over the crest of the access road and into the
structured road drainage to be provided as part of the road improvements ;
·
Developments
Site with no vehicular traffic (“development non-vehicular zones”) – where
porous or semi permeable paved surfaces will be used in association with grassed
swales and soakaways to attenuate run-off.
Terraced construction will control the rate of surface runoff with
catchpits providing oxygenation and solids removal at the steps formed. The run-off from the development
non-vehicular zone will be routed to pass through grit separators beneath the
proposed car park to remove sediments associated with “first flush” flow
(details refer to Annex C).
·
After
removal of sediments clear water can be discharged via a storage tank and
non-developed buffer zones into the existing stream system.
·
Areas
within the development site that are either naturally vegetated, landscaped
and/or undisturbed area (“non-development zones”) where run-off will not have
any interaction with the development and can pass into the existing stream
system via the buffer zones.
The principal impacts on the existing drainage that
require mitigation are as follows:
·
Increase
in the total volume of run-off;
·
Increase
in peak intensity of run-off flow; and
·
Increase
in risk of pollution.
The increase in water quantity has been addressed by
minimising the creation of impermeable surfaces, encouraging natural ground
water recharge through soakaways/filter drains and transferring all road runoff
into the adjacent urban catchment (Tai Po).
The increase in peak intensity has been addressed by controlled run-off
attenuation using swales, naturally lined channels, catchpits, and grit
separators with outlet control and undeveloped buffer zones. The risk of pollution has been addressed by
transferring runoff from high risk area to the adjacent urban catchment, and
the use of catchpits, filter drains and grit separators in the traffic free,
low risk Development Site. The ability
to discharge all stormwater flow off site without interaction with the Sha Lo
Tung stream has also been reviewed for emergency scenarios.
Therefore adverse hydrological changes to Sha Lo Tung
Stream and impacts on flow regime have been “designed out” of the stormwater
management system proposed and adverse impacts either in terms of quantity or
quality are not anticipated during operation of the Project.
The existing Sha Lo Tung Road
(approximately 2.3 km) is the only vehicular access to the Development
Site. The reason for the proposed
improvements is to upgrade the existing roadway to the standard requirement of
a Single Track Access Road that would also enable emergency access for fire
engines. Upon completion, the minimum
width of the improved Sha Lo Tung Road will be 4.5 m. In the absence of the road improvements,
delivery of emergency services would not be practicable. In order to meet the traffic demand during
construction and facilitate the transportation of construction plant or raw
materials to/from the Development Site, it is proposed to complete the road
improvement works prior to commencement of site formation works.
The principles of the design for the
road improvement works are: -:
·
Minimize
disturbance to the existing landscape and trees;
·
Preserve
woodlands of ecological value;
·
Provide
a safe access road engineered to meet the traffic demand; and
·
Enable
emergency vehicle access to the Ecological Reserve, Nature Interpretation
Centre and Multi-Cultural Education Retreat cum Columbarium.
Following the principles of
the improvement works, the impacts arising from the upgrading of Sha Lo Tung
Road will be kept to a minimum, and the improved road will be able to provide emergency
service access, serve the conservation facilities, Pat Sin Leng Country Park
and WSD Service Reservoirs etc. In light
of the low volume of traffic forecast, the access road shall remain a single
track access road with basic improvements to satisfy the Transport and Planning
Design Manual (TPDM) requirements and minimise the potential ecological impacts
as far as practicable. These include:
·
The
access road shall follow the existing road alignment and profile to minimise
earthworks and impacts to the existing environment. Nevertheless, the road shall be re-profiled
to ensure a maximum gradient less than 16% because a gradient more than 16% is
not suitable for use of emergency vehicles;
·
The
road will be widened towards the eastern side through cutting the uphill slopes
to avoid disturbing the woodland dominating on the western side. Plantation habitat (most trees were exotic
species) was located mainly on the east side of the road from the WSD service
reservoir downhill to Ting Kok Road.
Some native tree, shrub and herb species had colonized the understorey,
but at a lower density and diversity than in the understorey of the secondary
woodland. Despite its tall canopy and
rapid growth, the plantation remains relatively simple in structure, immature
and lacks diversity. Plantations of
exotic tree species typically support less wildlife than secondary woodlands;
·
The
proposed road improvements on the northern half of the road would be carried
out in grassland shrubland mosaic to the extent possible because this is a
habitat of typically low to moderate ecological value;
·
The
soil nailing, if required to stabilise slopes particularly downhill, can be
implemented carefully to avoid damage to trees and the slope surface can be planted
to maintain a green landscape after the improvement works are finished. Therefore the impact is expected to be
temporary and limited disturbance on the secondary woodland, and the finished
slope surface can be reinstated or planted for landscaping purpose.;
·
Provision
of a drainage system with additional verges and sewers along the route; and
·
Appropriate
landscape design along the access road.
Pat Sin Leng Country Park, Conservation Area, Fung
Yuen Valley SSSI and Sha Lo Tung Valley including SSSI and streams will not be
directly affected by the development. The improvement of Sha Lo Tung Road will
generally be implemented on the eastern uphill side to avoid most of the
woodland located on the western or downhill side of the road. There would be no direct impact to Pat Sin
Leng Country Park or to either of the SSSIs (Sha Lo Tung and Fung Yuen) and
Conservation Area because the road improvements avoid these protected areas. Further to the implementation of the design
principle listed above (for more details refer to Section 3.4), the potential ecological
impacts during the construction phase will be:
Potential habitat loss was estimated by overlaying the
proposed alignment on the habitat map using ArcView GIS. The following components of the road
improvement would cause loss of habitat and would be taken into account:
improvement of the roadway, uphill cut slopes and construction of retaining
walls downhill.
The soil nailing, if required to stabilise downhill
slopes, can be implemented carefully to avoid damage to trees. It is confirmed that there is limited and
temporary disturbance to the existing soil and vegetation on the surface, as
well as the associated habitat.
Therefore soil nailing is not included in the habitat loss
estimates.
In contrast, construction of retaining walls would
cause some loss of habitat.
·
Permanent
loss (worst case scenario) of secondary woodland (approximately 0.2 ha),
plantation (approximately 0.43 ha), grassland shrubland mosaic (approximately
0.65 ha) and developed area (approximately 1.08 ha) due to the improvement
works of the Sha Lo Tung Road (refer to Table 9.13); and
·
Potential
loss of plant species of conservation interest including Incense Tree, Lamb of Tartary,
Hong Kong Pavetta, Rhodoleia, Common Tutcheria and Cycad Fern (Table 9.14).
The design
principles in the road improvement works include minimising disturbance to the
existing landscape and preserving landscapes of ecological value. The earthwork and geotechnical work has been
minimised to adopt the minimum requirement but meet the road standard for
emergency vehicles. The loss of the
secondary woodland on downhill slopes would be minimised where possible by
improving the road on the uphill side.
Where this is not possible, retaining walls would be constructed on the
downhill slopes, and loss of the secondary woodland could be minimised not more
than 0.2 ha. This small area loss is
inevitable because (i) woodlands line both sides of the roadway over one
section; and (ii) some retaining walls must be constructed on the downslope
side of the road due to conflicting land use on the upslope side in the
vicinity of the WSD facilities.
Associated Impacts to Wildlife
Potential loss
of foraging and feeding ground for wildlife, particularly species of
conservation interest recorded along Sha Lo Tung Road during the surveys, are
summarised in Table 9.14. In particular it is anticipated that the
Savannah Nightjar, found resting on the road during one survey, will not be adversely affected.
Habitat Fragmentation and Isolation
As the Sha Lo Tung Road Improvement will be undertaken
along the existing road and as the scale of the habitat loss is small in the
context of the surrounding similar habitats, the potential impacts of habitat
fragmentation and isolation are considered to be minimal.
Runoff and drainage from construction sites may
contain loads of suspended solids and contaminants. Potential sources of water pollution from
site runoff include:
·
Runoff
and erosion of exposed bare soil and earth, drainage channels and stockpiles;
·
Uncontrolled
discharge of wastewater generated from concrete washing and sewage generated
from the on-site work force;
·
Release
of cement materials with rain wash;
·
Wash
water from dust suppression sprays and vehicle wheel washing facilities; and
·
Fuel,
oil, and lubricant from maintenance of construction vehicles and mechanical
equipment.
Local water pollution could be
substantial if the construction site runoff is allowed to drain into the nearby
streams and Sha Lo Tung SSSI, the storm
drain or natural drainage without mitigation.
The wastewater from the above washing activities, particularly concrete
washing, may contain high levels of suspended solids and high pH value. Direct discharge of such wastewater would
have potential impacts to the nearby Water Sensitive Receivers (WSRs) located
at the northern end and to the west of Sha Lo Tung Road.
The ecological impacts and effects on
water quality from the construction activities will be controlled, provided
that the majority of earthworks are scheduled in the dry season, a well
designed temporary drainage system (which will pump away the construction
runoff without discharge into the Sha Lo Tung catchment area) is provided, and
a phasing schedule and good construction practices are implemented (refer to Sections 3 & 6).
Secondary impacts to the surrounding
habitats, in particular the Sha Lo Tung Valley, secondary woodlands, natural
streams at Sha Lo Tung SSSI, Conservation Area and Pat Sin Leng Country Park
and associated wildlife may arise from the increased noise impact, human
activities and disturbance. The impacts
are expected to be low to moderate owing to the temporary nature and relatively
small scale of the construction works (major earthworks undertaken only during
the dry season) and environmental management measures, and regular checks on
construction boundaries will be conducted.
Impacts to ecological resources are not expected to be unacceptable.
Cumulative Impacts
The Fung Yuen Residential Development and associated
road works are currently ongoing. The
project fall within the Study Area but are expected to be completed when the
current Project construction works commences and therefore no concurrent
projects are anticipated.
It should also be noted that the
construction of the Development Site and Sha Lo Tung Road Improvement would not
be undertaken concurrently, as the existing Sha Lo Tung Road has to be improved
before the construction activities of the Development can commence.
It is
anticipated that the potential ecological impacts due to the operation of the
improved Sha Lo Tung Road would be minimal.
Surface Runoff
Vehicles will enter the Nature Interpretation Centre, and
the Multi-Cultural Education Retreat cum Columbarium via the improved Sha Lo Tung Road.
The road runoff may contain minimal amounts of oil, grease and grit that
may cause ecological and water quality impacts to the watercourses, if
uncontrolled.
The improved Sha Lo Tung Road and car park within the
Development Site will be kerbed and will have back of kerb filter drains,
trapped road gullys and a piped stormwater system. This will discharge run-off to a pumping
station located beneath the car park area with all flows being discharged back
over the crest of the access road and into the structured road drainage to be
provided as part of the road improvements.
The pumping station pumps and wet well will be sized to control the rate
of discharge from the development vehicular zone such that the drainage system
for the upgraded Sha Lo Tung Road will not be overloaded. Removing the upgraded highway and car park runoff
from the Development Site will not only eliminate the risk of oil leakage
spillage contaminating the natural stream courses it will also offset the
potential for increased runoff from the proposed Development Site and therefore
maintain the hydrological balance of the Sha Lo Tung stream system.
Roadkill
The traffic volume along the Sha Lo
Tung Road is forecast to remain low (on festival days only the
proponent’s shuttle buses and emergency vehicles will be allowed to use Sha Lo
Tung Road and restricted to daytime). Therefore, wildlife killed
on the road due to collision with a vehicle (roadkill) is unlikely to happen;
throughout the surveys no roadkill was observed and a species of conservation
interest that was recorded resting on the road (Savannah Nightjar) flew off as
the surveyors approached in their vehicle.
The improved Sha Lo Tung Road will not have street lighting installed
and hence there will be no associated adverse impacts (eg attract wildlife to
the road at night).
Potential impacts to ecology have
been evaluated according to Table 1
of Annex 8 of the EIAO TM.
No habitat loss is anticipated in
the Ecological Reserve due to the Project.
Minimal vegetation disturbance is expected during the works associated with the fencing at Lei Uk,
construction and removal of the temporary footbridge and minor improvement of
the existing new footpath to Lei Uk.
Habitats affected by the Development Site and the Sha Lo Tung Road
Improvement include secondary woodland, plantation, grassland shrubland mosaic
and developed area. Tables 9.15 to 9.19 present an evaluation of the habitat loss due to the Project
(effectively Development Site and Sha Lo Tung road, as there is no habitat loss
in the Ecological Reserve).
There will be permanent habitat loss
of approximately 0.025 ha and 0.2 ha of secondary woodland at the Development
Site and along Sha Lo Tung Road respectively due to the development. Although soil nailing will cause some
temporary disturbance to the top soil and understory flora within the Sha Lo
Tung Road Improvement area no trees will be affected. The soil nails lie beneath the surface and areas
initially affected by their insertion would be planted or become naturally
covered with vegetation in time. The
loss of secondary woodland habitat is therefore considered negligible.
In view of the small size of the
habitat affected by the Development Site and along Sha Lo Tung Road
Improvement, the availability of similar habitat in the vicinity, it is considered
that the impact to the wildlife within the secondary woodland would not be
unacceptable.
Table 9.15 Overall
Impact Evaluation for Secondary Woodland due to the Project
Evaluation Criteria |
Development Site |
Sha Lo Tung Road Improvement |
Habitat Quality |
The habitat
quality is moderate to high. |
The habitat
quality is moderate to high. |
Species of Conservation Interest |
Plant species
including Willow-leaved Camellia is potentially affected, but they can be
preserved through proper design of the Development or transplantation. Bird species of
conservation interest that are potentially affected (due to the loss of
associated habitat [ie perching/ foraging]) include the Hwamei, but the impact
is expected to be low due to the tiny area affected and the abundance of
similar habitat in the surrounding area.
The dragonfly
Chinese Tiger was not recorded within the Development Site but this species
likes to perch on tree tops and therefore the impacts on the woodland within
the Development Site near to the Sha Lo Tung perennial streams may cause
potential loss of its habitat.
However, the impacts are expected to be low due to the abundance of
similar habitat in the surrounding area.
|
Incense Tree,
Cycad Fern, Lamb of Tartary and Hong
Kong Pavetta, are potentially
affected, but the three species can be preserved through proper design of the
Sha Lo Tung Road improvement and transplantation. Bird species of
conservation interest that are potentially affected (due to the loss of
associated habitat [ie perching/ foraging]) include the Emerald Dove, but the
impact is expected to be low due to the tiny area affected and the abundance
of similar habitat in the surrounding area |
Size/Abundance |
Permanent loss of
approximately 0.025 ha of secondary woodland at the Development Site. |
Permanent loss of
approximately 0.2 ha of secondary woodland along the Sha Lo Tung Road. |
Duration |
The impact will persist
during the construction and operational phases |
The impact will
persist during the construction and operational phases |
Reversibility |
The secondary
woodland is mature and new planting of secondary woodland may require over 30
years to reach maturity. |
The secondary
woodland is mature and new planting of secondary woodland may require over 30
years to reach maturity. |
Magnitude |
The scale of the
habitat loss and impact is small in the context of the surrounding similar habitats,
flora and fauna |
The scale of the
habitat loss and impact is small in the context of the surrounding similar
habitats, flora and fauna |
Overall Impact
Conclusion |
Low |
Low |
There will be permanent habitat loss
of approximately 0.43 ha of plantation due to the development of Sha Lo Tung
Road. In view of the small size of the
habitat affected, and the availability of similar habitat in the vicinity, it
is considered that the impact to the wildlife within the plantation would not
be unacceptable.
Table 9.16 Overall
Impact Evaluation for Plantation due to the Project
Evaluation Criteria |
Plantation along Sha Lo Tung Road |
Habitat Quality |
The habitat quality is low. |
Species of Conservation Interest |
Common Tutcheria Lamb of Tartary
and Rhodoleia are all potentially
affected, but the plants can be preserved through design of the Sha Lo Tung
Road improvement works. Bird species of conservation
interest that are potentially affected include, Greater Coucal and Crested
Serpent Eagle (due to the loss of associated habitat [ie perching/ foraging])
but the impacts are expected to be low due to the tiny area affected and the
abundance of similar habitat in the surrounding area. |
Size/Abundance |
Permanent loss of approximately
0.43 ha. |
Duration |
The impact will persist during the
construction and operational phases |
Reversibility |
The plantation is mature and newly
planted trees may require 20 years to reach maturity. |
Magnitude |
The scale of the habitat loss and
impact is small in the context of the surrounding similar habitats, flora and
fauna |
Overall Impact Conclusion |
Low |
There will be permanent habitat loss
of approximately 1.54 ha and 0.65 ha of grassland shrubland mosaic at
Development Site and along Sha Lo Tung Road respectively due to the
development. In view of the small size
of the habitat affected, low to moderate ecological value of the habitat, and the
availability of similar habitat in the vicinity, it is considered that the
impact to the wildlife within the grassland shrubland mosaic would not be
significant.
Table 9.17 Overall
Impact Evaluation for Grassland Shrubland Mosaic due to the Project
Evaluation
Criteria |
Development Site |
Sha Lo Tung Road Improvement |
Habitat Quality |
The habitat quality is low to
moderate. |
The habitat quality is low to
moderate. |
Species |
Plant species including Bamboo Orchid
is potentially affected, but they can be preserved through proper design of
the Development or transplantation. Bird species of conservation
interest that are potentially affected (due to the loss of associated habitat
[ie perching/ foraging]) include Crested Serpent Eagle, Lesser Coucal,
Greater Coucal, Hwamei and Savannah Nightjar.
The impacts are expected to be low due to the small area affected and
the abundance of similar habitat in the surrounding area. |
Cycad-fern was found at grassland shrubland
mosaic adjacent to Sha Lo Tung Road but they can be preserved through proper
design of the Road or transplantation. Bird species of conservation
interest that are potentially affected (due to the loss of associated habitat
[ie perching/ foraging]) include Hwamei, Lesser Coucal and Common Buzzard.
The impacts are expected to be low due to the tiny area affected and the
abundance of similar habitat in the surrounding area. |
Size/Abundance |
Permanent loss of approximately
1.54 ha of grassland shrubland mosaic at the Development Site. |
Permanent loss 0.65 ha of grassland
shrubland mosaic along the Sha Lo Tung Road.
|
Duration |
The impact will persist during the
construction and operational phases |
The impact will persist during the
construction and operational phases |
Reversibility |
The grassland shrubland mosaic can readily be recreated. It may take 5 to 10 years for the grassland shrubland mosaic to be
recreated. |
The grassland shrubland mosaic can readily be recreated. It may take 5 to 10 years for the grassland shrubland mosaic to be
recreated. |
Magnitude |
The scale of the habitat loss and
impact is small in the context of the surrounding similar habitats, flora and
fauna |
The scale of the habitat loss and impact
is small in the context of the surrounding similar habitats, flora and fauna |
Overall Impact Conclusion |
Low |
Low |
There will be permanent habitat loss
of approximately 0.06 ha and 1.08 ha of developed area at the Development Site
and along Sha Lo Tung Road respectively.
In view of the small size of the habitat affected, negligible ecological
value of the habitat, and the availability of similar habitat in the vicinity,
it is considered that impacts to wildlife within the developed area would not
be expected.
Table 9.19 Overall
Impact Evaluation for Developed Area due to the development
Evaluation Criteria |
Development Site |
Sha Lo Tung Road Improvement |
Habitat Quality |
The habitat quality is negligible. |
The habitat quality is negligible. |
Species |
No species of conservation interest
will be impacted. |
One bird species of conservation interest
was found resting on the road (Savannah Nightjar) and the scat of the Masked
Palm Civet (a mammal of conservation interest) was also found on the
road. Neither of these species are
expected to be adversely impacted as this is not their primary habitat and
they are highly mobile, so can easily avoid vehicles on the road. |
Size/Abundance |
Permanent loss of approximately
0.06 ha of developed area at the Development Site. |
Permanent loss of approximately 1.08
ha of developed area along the Sha Lo Tung Road. |
Duration |
The impact will persist during the
construction and operational phases |
The impact will persist during the
construction and operational phases |
Reversibility |
The developed area can readily be
recreated. |
The developed area can readily be
recreated. |
Magnitude |
The scale of the habitat loss and
impact is small in the context of the surrounding similar habitats, flora and
fauna |
The scale of the habitat loss and impact
is small in the context of the surrounding similar habitats, flora and fauna |
Overall Impact Conclusion |
Negligible |
Negligible |
In conclusion, the direct ecological
impacts due to the Development Site and Sha Lo Tung Road Improvement are
expected to be of low severity and magnitude, and will not contribute to any
potential cumulative impact.
Habitat loss (permanent and
temporary) during construction and operation phases will reduce the area of
perching sites, foraging and feeding grounds for wildlife (particularly the
species of conservation interest recorded) close to the Development Site and
along Sha Lo Tung Road, including birds (ie Crested Serpent Eagle, Common Buzzard,
Emerald Dove, Greater Coucal, Hwamei, Lesser Coucal and Savannah Nightjar, as
well as Large Grass Warbler) and dragonfly (ie Chinese
Tiger). The impacts are expected to be
low owing to the extensive habitat areas available in the vicinity, as well as
the temporary nature of the construction work.
With the provision of a 20 m
building buffer from Sha Lo Tung SSSI, the riparian woodlands which served as
wildlife foraging/ roosting grounds (particularly for Chinese Tiger) are
preserved significantly. The small-sized
habitat loss due to the proposed development will not cause any adverse impacts
on the wildlife using the SLT SSSI and associated habitats. The ecological impacts on the larval stage of
the dragonfly community in the SSSI due to the water quality impacts from the
construction activities are likely to be controlled, provided that earthworks
are scheduled in the dry season, a well designed temporary drainage system is
provided, a 20 m building buffer from Sha Lo Tung SSSI is reserved, and a
phasing schedule and good construction practices are implemented.
Potential impacts on the plant
species of conservation interest including Cycad Fern, Incense Tree, Hong Kong
Pavetta, Lamb of Tartary, Rhodoleia, Common Tutcheria, Bamboo Orchid and Willow-leaved
Camellia can be reduced through proper design of the Development Site and Sha
Lo Tung Road improvement. Should the
plant species be affected, impacts will be reduced through transplantation
prior to the commencement of the construction works.
Annex 16 of the EIAO TM states that the general policy for mitigation of
significant ecological impacts, in order of priority, is:
Avoidance: Potential
impacts should be avoided to the maximum extent practicable by adopting suitable
alternatives;
Minimisation: Unavoidable
impacts should be minimised by taking appropriate and practicable measures such
as constraints on intensity of works operations or timing of works operations;
and
Compensation: The loss of
important species and habitats may be provided for elsewhere as
compensation. Enhancement and other
conservation measures should always be considered whenever possible.
As part of the Sha Lo Tung Valley
location selection process for the proposed development, a number of locations
have been analysed. Disturbance to
terrestrial ecological resources of acknowledged conservation significance was
avoided by screening out the following areas from consideration when planning
and designing the Development Site:
·
Sha
Lo Tung Valley core areas;
·
Sha
Lo Tung Site of Special Scientific Interests (SSSI);
·
Conservation
Area;
·
Wet
abandoned agricultural land adjacent to the Development Site (Hong Kong
Paradise Fish recorded in this habitat); and
·
Secondary
woodland within the Development Site.
The Development Site, located at the
entrance of Sha Lo Tung Valley (mainly grassland shrubland mosaic), is not
considered to be an ecologically significant area. It should be noted that the Development Site
also avoids the Pat Sin Leng Country Park and Conservation Area, as well as the
wet abandoned agricultural land.
With the adoption of the 20 m wide non-building buffer and proper
design, the building layout preserved the majority (about 92%) of the secondary
woodland (with a total of 0.3 ha and only 0.025 ha to be affected) within the
Development Site. In addition, the Sha
Lo Tung Road Improvement also avoids direct impacts to Fung Yuen Valley SSSI.
In order to minimise the potential
ecological impacts, mitigation measures and good construction practices are
recommended in the following sections.
Only small scale works will be
undertaken within the Ecological Reserve during the construction phase of the
project. These include fencing at Lei Uk, construction and
removal of a temporary footbridge and minor improvement of the existing new
footpath to Lei Uk. With the
implementation of good construction practice, no adverse ecological impact is anticipated for these
small scale works.
·
Conduct
all the works during dry season and using hand tools;
·
Stockpile
materials offsite;
·
Locate
the footing of the temporary footbridge at bare land and avoid vegetated areas
as much as practical;
·
Avoid
or minimize vegetation removal as much as possible;
·
Restrict
the number of workers within the Ecological Reserve during construction; and,
·
Regularly
check the work site boundaries to ensure that they are not breached and that
damage does not occur to surrounding habitats in particular the secondary
woodland and Sha Lo Tung streams.
Mitigation measures required for the
operation/ maintenance of Ecological Reserve relate to visitor control, and
general maintenance works, as listed below.
Visitor Control
·
Undertake
trail maintenance, provision of signage and guided tour (provided by the Green
Power/ Nature Interpretation Centre), as proposed under CMP, as well as staff
patrolling (eg for vandalism) and monitoring of the site, in order to control
and manage the human activities due to the additional visitors attracted to the
valley.
·
Provide
sufficient Conservation Ambassadors (ie 30 people, organised by Green Power),
who will serve as reserve guards to advise, control and educate visitors of the
regulations in the Ecological Reserve, during special festivals, ie Ching Ming
or Chung Yeung.
·
Although
Pat Sin Leng Country Park is open for public enjoyment all the time, the Nature
Interpretation Centre will be closed during festival days to avoid attracting
people who might wander into the Ecological Reserve.
Maintenance work
·
Any
footpath maintenance work will be carried out manually or by small scale
machines.
Further to the implementation of the
Conservation Management Plan, the ecological value of the Ecological reserve will
expect to be enhanced.
Minimisation of the
Development Footprint
The preliminary
Master Layout Plan minimised the development footprint within the Development
Site. Although the total area of the
Development Site is approximately 4.1 ha, the land take for the development
including building structures, areas for site office and stockpile during
construction, cut slope and sitting out areas, as well as the proposed
landscape hardworks, is only approximately 1.625 ha (comprised only about 39.6%
of the total site area).
Detailed Engineering
Design Avoiding Habitat and Vegetation Loss
The preliminary Master Layout
Plan minimised the impacts on the secondary woodland and trees within the
Development Site. The detailed engineering
design should adopt the principle of balancing the minimising loss of trees
(therefore secondary woodland) and ecological habitats with the visual impact
of the Project. This has been
demonstrated in the preliminary Master Layout Plan which preserved majority of
the secondary woodland (in which only approximately 0.03 ha would be
affected). Provision of an additional 20
m wide non-building buffer between the Sha Lo Tung SSSI and construction
activities in Development Site should be strictly implemented.
To avoid ecological risk to the downstream
Sha Lo Tung Valley, in particular the threats to the stream fauna including the
larval stage of the dragonfly community, any discharge of construction runoff
and wastewater to Sha Lo Tung Stream and the wet abandoned agricultural land from
the Development Site is prohibited. The
following practices and measure to be proposed are targeted to ensure no discharge
of construction runoff to the downstream ecological sensitive areas.
·
Completion
of Sha Lo Tung Road Improvement in advance.
Before any construction works are undertaken within the Development
Site, the Sha Lo Tung Road should be improved with well designed drainage
systems. All of the construction run-off
will be collected by the temporary drainage system with sandtrap (with
sufficient capacity) and then discharged to the newly constructed stormwater
drainage system along the improved Sha Lo Tung Road.
·
Restricted
Earthworks to the Dry Season. Major
Earthworks within the Development Site will only be undertaken in the dry
season (November to March) in order to avoid the risk of construction runoff
reaching ecological sensitive areas.
With the implementation of this measure, the risk from excessive
construction runoff in the event of a heavy rainstorm could be prevented. Major earthworks will be strictly prohibited
during the wet season to minimise any ecological risk to the Sha Lo Tung
Valley.
·
Adoption
of Construction Sequences. Given that
the Development Site is elongated in shape and hilly in nature, the
construction sequence should be well managed in order to limit the volume of
surface runoff and treated effluent generated on-site, in particular during the
wet season (works other than earthworks).
In order to limit the size of exposed area and volume of the surface
runoff, the construction activities will be carried out sequentially (phase by
phase and sub-area to sub-area) rather than in parallel (refer to Site
Formation Construction Sequence as shown in Figure 3.13). Such
arrangement will help ensure that no construction runoff will discharge into
Sha Lo Tung Stream.
·
Provision
of Temporary Drainage Channels.
Peripheral temporary drainage channels (special designed U-channel, like
a “J” shape will be used) should be constructed along low side of all of the
works areas within the Development Site prior to the commencement of the
construction works (refer to Figure
6.3). All of the construction
run-off will be collected by the temporary drainage system with a sufficient
number of sandtraps and oil interceptors and then discharged to the newly
constructed stormwater drainage system along the Sha Lo Tung Road. A sandtrap of large capacity is proposed to
connect between the temporary drainage system within the Development Site and
the newly constructed stormwater drains beneath the Sha Lo Tung Road. All surface runoff within the site will be
diverted to this sandtrap before it is discharged from the site. Due to the lower level at the surface water
collection point within the Development Site, the surface water within the Site
will be stored to temporary storage tank (after passing through sandtrap) in
which a submersible pump will operate to continuously pump the surface runoff
to the proposed sandtrap. A spare
submersible pump will be put in place in the storage tank for contingency
purpose. Dual power supply or ring main
supply and standby submersible pumps will also be provided to prevent the
occurrence of emergency discharge of surface runoff into nearby SSSI and CA
zones. In accordance with Section 8.2.4
of Geotechnical Manual for Slopes, the design of temporary drainage system was
based on 1 in 20 years return period.
·
Provision
of Silt Removal Facility. Sandtraps will
be provided on site for wastewater treatment before discharge. The Contractor should ensure that the
sandtraps will be large enough to handle the site runoff / discharges and will
be properly maintained. The design of
efficient silt removal facilities should be based on the guidelines in Appendix
A1 of ProPECC PN 1/94. The effectiveness
of the sand traps should be checked and maintained regularly.
·
Separate
Temporary Drainage System for Natural Runoff.
The temporary drainage system may not be able to handle high volume of
natural hinterland surface runoff from the surrounding hills during heavy
rainfalls. The surface runoff from the
Site could be separated from the natural hinterland surface runoff by
deployment of two drainage systems. To
cater for the surface water running from the hinterland in particular at the
southern end to the low profile of the Site, a separate temporary drainage
system including catchpits and drainage pipes is proposed to direct the natural
surface runoff without any contamination due to site activities to north side
of the site (refer to Figure
6.3).
·
Erection
of Site Hoardings and Chain-link Fence with Seal. Site hoardings and chain-link fence will be
erected along the temporary drainage system enclosing the whole Development
Site (refer to Figures 6.3
& 6.4). The hoardings and chain-link fence should be
erected firmly attached to the channel (any gaps are to be filled and cemented)
in order to avoid any accidental spilling over the peripheral channel to the
nearby streams. All of the excessive
runoff due to heavy rainfall or overflow of sandtraps/ storage tanks could be
retained within the Site and avoid any accidental discharges into the Sha Lo
Tung Stream. The erection of the
hoardings and chain-link fence should avoid any additional impacts to the
existing trees.
·
Daily
Inspection. Green Power will provide a
Conservation Specialist to stay on-site during the construction phase. The Green Power representative will inspect
the site daily to check the implementation and effectiveness of the runoff
control measures. The person will have
the authority to stop the construction works should the implementation and
effectiveness of the runoff control measures not be satisfactory. Further details on these activities are
presented in Section 12.
Avoidance of
Encroachment onto Country Park and SSSI
·
Demarcate
the boundary of Pat Sin Leng Country Park, Conservation Area, Sha Lo Tung SSSI
and the Development Site prior the commencement of construction
activities. The works site should be
enclosed by site hoarding which will restrict all of the work activities within
the Development Site boundary.
·
During
the Festive periods, ie Ching Ming or Chung Yeung, only the proponent’s shuttle
buses and emergency vehicles will be allowed to use Sha Lo Tung Road. Visitors to the columbarium will not be
allowed to walk up Sha Lo Tung Road unless directed by the Police when need
arises. Visitors will only be allowed to
leave the columbarium through the shuttle buses so as to avoid human
disturbance to Sha Lo Tung Valley. It
should be noted that the above arrangement only applies to visitors to the
columbarium; visitors to trails and Country Park will not be affected;
·
Manage
and restrict visitors’ activities within the site by provision of fencing and
landscape planting around the Multi-Cultural Education Retreat and Columbarium
and encourage them not to wander into the adjacent Ecological Reserve,
Conservation Area and Sha Lo Tung SSSI, particularly during festival days; and
·
Provide
sufficient Conservation Ambassadors (ie 30 people, organised by Green Power),
who will serve as reserve guards to advise, control and educate visitors of the
regulations in the Ecological Reserve, during special festivals, ie Ching Ming
or Chung Yeung.
·
Bamboo
Orchid and Willow-leaved Camellia were identified as being of conservation
interest within the Development Site. As
a mitigation measure, the affected individuals (if confirmed as necessary
during detailed engineering design) will be transplanted to suitable nearby
habitats prior to the construction phase as far as practicable. A detailed vegetation survey on the plant
species will be conducted within the Development Site by a suitably qualified
botanist/ ecologist to identify and record the affected individuals prior to
the commencement of site clearance works.
The survey will also serve to identify any other plants of conservation
interest which may be present in the Development Site (eg Viburnum hanceanum)
which also need transplanting.
Feasibility and suitability of transplanting the affected plant species
will be carefully studied and suitable receptor sites will be identified. A detailed transplantation proposal providing
information on transplantation methodology, recipient site, implementation
programme, watering requirement, post-transplantation monitoring and personnel
involved shall be submitted to and approved by the AFCD, EPD and District Lands
Office. Transplantation will be supervised
by a suitably qualified botanist/ horticulturist. After transplantation, monitoring will be
undertaken to check the performance and health conditions of the transplanted
individuals on a weekly basis for the first month after transplantation and on
a monthly basis for an additional eleven months. Remedial actions will be discussed with AFCD,
EPD and District Lands Office in the event of unsuccessful transplantation.
·
Erect
fences along the boundary of the works area within the Development Site before
the commencement of works to prevent vehicle movements, and encroachment of
personnel, onto adjacent areas in particular the Pat Sin Leng Country Park,
Conservation Area and Sha Lo Tung Valley (including Sha Lo Tung SSSI and
streams);
·
Restrict
the number of workers within the Development Site during construction and
request workers do not enter the ecologically sensitive areas, such as the Sha
Lo Tung SSSI (unless necessary for the works to be undertaken in the Ecological
Reserve) during working hours, throughout the construction phase;
·
Regularly
check the work site boundaries to ensure that they are not breached and that
damage does not occur to surrounding areas in particular the Pat Sin Leng
Country Park, Conservation Area and Sha Lo Tung Valley (including Sha Lo Tung
SSSI and streams);
·
Reinstate
temporarily affected areas immediately after completion of construction works,
through on-site tree/shrub planting. The
tree/shrub species will be chosen with reference to those in the surrounding
area and/or Annex F2; and,
·
No
night time construction works within the Development Site.
Water Quality Control for Runoff / Stormwater during
Operational Phase
For the measures to be adopted to mitigate against
adverse impacts from runoff/ stormwater during the operational phase of the
Development Site, refer to p9-59, Section 9.9.2 Development Site / Operational
Phase / Surface Runoff
Detailed Engineering
Design Avoiding Habitat and Vegetation Loss
The detailed engineering design of the Sha Lo Tung
Road Improvement should adopt the following measures:
·
Minimise
the loss of secondary woodland as well as the associated mature trees by
adjusting/ fine-tuning the detailed engineering design of the improvement of
Sha Lo Tung Road whenever possible, in particular soil nailing in conjunction
with temporary cutback, during the detailed design stage.
·
Avoid
the loss of plant species of conservation interest including Incense Tree, Lamb
of Tartary, Hong Kong Pavetta, Cycad Fern, Common Tutcheria and Rhodoleia by
adjusting/ fine-tuning the detailed engineering design of the improvement of
Sha Lo Tung Road whenever possible during the detailed design stage.
·
If
the plant species of conservation interest cannot be avoided due to the
engineering constraint, the affected individuals will be transplanted to a
similar habitat in the vicinity or within the Development Site or Ecological
Reserve. For details of vegetation
transplantation, see below.
·
The
Incense Tree, Lamb of Tartary, Hong Kong Pavetta, Rhodoleia, Common Tutcheria and
Cycad Fern were identified as being of conservation interest along the Sha Lo
Tung Road. These species will have the
potential to be affected by the improvement of Sha Lo Tung Road. As a mitigation measure, the affected
individuals will be transplanted (if confirmed as necessary during detailed
engineering design) to suitable nearby habitats prior to the construction phase
as far as practicable. A detailed
vegetation survey on these plant species will be conducted along the Sha Lo
Tung Road by a suitably qualified botanist/ ecologist to identify and record
the affected individuals prior to the commencement of site clearance
works. The survey will also serve to
identify any other plants of conservation interest which may be present in
along the Sha Lo Tung Road (eg Viburnum hanceanum) which also need
transplanting. Feasibility and
suitability of transplanting the affected plant species will be carefully
studied and suitable receptor sites will be identified. Detailed transplantation proposal providing
information of transplantation methodology, recipient site, implementation
programme, watering requirement, post-transplantation monitoring and personnel
involved shall be submitted to and approved by the AFCD, EPD and District Lands
Office. Transplantation will be
supervised by a suitably qualified botanist/ horticulturist. After transplantation, monitoring will be
undertaken to check the performance and health conditions of the transplanted
individuals on a weekly basis for the first month after transplantation and on
a monthly basis for an additional eleven months. Remedial actions will be discussed with AFCD,
EPD and District Lands Office in the event of unsuccessful transplantation.
·
Arrange
the Earthworks to maximise avoidance of the Wet Season. All the earthworks under Phases 1, 2 and 3,
particularly close to the WSRs including Sha Lo Tung SSSI, stream and Fung Yuen
Valley SSSI, will be undertaken during the dry season (November to March) in
order to avoid the risk of construction runoff overflow to the downstream
ecological sensitive areas.
·
Adoption
of Construction Sequences. Given that
the total length of the Sha Lo Tung Road is approximately 2.3 km, the
construction sequence will be well managed in order to limit the volume of
surface runoff and treated effluent generated on-site, in particular during the
wet season (works other than earthworks).
In order to limit the size of the exposed area and volume of the surface
runoff, the construction activities will be carried out sequentially (phase by
phase) rather than in parallel (refer to Road Improvement Work Plan as shown in
Figure 3.22).
·
Provision
of Temporary Drainage Channels. To
prevent the discharge of silty surface run-off to the existing watercourse, an
effective temporary drainage system will be introduced for the road improvement
work. Prior to the construction,
temporary hoarding will be erected and sandbags be placed at the toe of the
hoarding within the works site (refer to Figures 6.3 & 6.4) to prevent any silty water flowing out of the works
site. As shown in Figure 3.22, at least two
temporary sandtraps connecting with temporary surface drainage will be proposed
at each phase of road improvement works (except Phase 3) prior to discharging
into the nearest watercourse to avoid any excessive sediment or blockage of
existing natural drainage system.
Similar to the construction activities within the Development Site, all
of the surface run-off generated along the section close to Sha Lo Tung Valley
(approximately half of the Phase 3) will be collected by the temporary drainage
system with a sufficient number of sandtrap (with sufficient capacity) and then
discharged to the newly constructed stormwater drainage system along the improved
Sha Lo Tung Road. A sandtrap is proposed
to connect between the temporary drainage system within the Development Site
and the newly constructed stormwater drains beneath the Sha Lo Tung Road. All surface runoff within the site will be
diverted to this sandtrap before it is discharged from the site. Due to the lower level at the surface water
collection point within the Development Site, the surface water within the Site
will be stored in temporary storage tanks (after passing through sandtraps) in which
a submersible pump will operate to continuously pump the surface runoff to the
proposed sandtrap. A spare submersible
pump will be put in place in the storage tank for contingency purpose.
·
Erect
fences along the boundary of the works area before the commencement of works to
prevent vehicle movements, and encroachment of personnel, onto adjacent areas
in particular the Pat Sin Leng Country Park, Conservation Area, Fung Yuen
Valley SSSI and Sha Lo Tung Valley (including Sha Lo Tung SSSI and
streams);
·
Regularly
check the work site boundaries to ensure that they are not breached and that
damage does not occur to surrounding areas in particular the Pat Sin Leng
Country Park, Conservation Area, Fung Yuen Valley SSSI and Sha Lo Tung Valley
(including Sha Lo Tung SSSI and streams); and,
·
Reinstate
temporarily affected areas immediately after completion of construction works,
through on-site tree/shrub planting. The
tree/shrub species will be chosen with reference to those in the surrounding
area and/or Annex F2.
The Project will provide
approximately 2 ha of on-site compensatory tree and shrub planting for the loss
of secondary woodland (approximately 0.03 ha due to the Development Site and
approximately 0.2 ha due to the Sha Lo Tung Road Improvement) and plantation
(approximately 0.43 ha due to the Sha Lo Tung Road Improvement). The compensatory planting will be planted on-site, within the
Development Site and the Ecological Reserve.
The concept of the proposed
compensatory planting at the Development Site is presented in Figures 10.5a-c.
The proposed planting areas within the Ecological Reserve is recommended
in grassland shrubland mosaic to the north of the Study Area (refer to Figures 9.2 & 10.5b). It should be noted that the exact
locations and relative size of the compensatory planting should be approved by
AFCD and EPD. The selection of planting species shall be made with reference to the
species identified in Annex F2 and be native to
Hong Kong or the South China region. The
arrangement of the on-site compensatory planting, ie tree/ shrub mix and exact
location, will be subject to the detailed landscape design. The cut slopes along the improved Sha Lo Tung
Road (with approximately 0.47 ha in total) will also be planted with native
shrubs and trees or hydroseeded subject to the gradients.
9.11
Residual Environmental Impacts
The key ecological impact assessment
and the associated mitigation measures as well as the residual ecological
impacts are summarised in Table 9.21.
The Pilot Project for Public-Private Conservation
Scheme establishes the framework for a public-private partnership to conserve
the Sha Lo Tung Valley. Under the
current proposal, Sha Lo Tung Valley will be ensured of long-term active
conservation management in which the ecologically sensitive areas currently
located on private land owned by the SLTDC will be protected. It should be noted that the habitat quality
within Sha Lo Tung Valley is degrading due to threats such as use of four wheel
drive vehicles, hill fires, wargames and vegetation removal. With the implementation of the enhancement
work and Conservation Management Plan (Annex A1) as proposed,
the habitat quality within the Sha Lo Tung Valley will be enhanced and human
disturbance such as hill fire will be largely reduced/ controlled.
No residual ecological impact will be expected due to
the minor works after the implementation of the good construction practice.
It is unlikely that the polluted water will flow from
the construction site into the perennial streams in Sha Lo Tung SSSI or the wet
abandoned agricultural land during the construction phase in view of the
following measures. These measures will
minimise the site run-off and avoid any contaminated run-offs discharging into
Sha Lo Tung Stream and hence no residual ecological impacts on Sha Lo Tung
Stream are expected.
·
Restrict
earthworks to the dry season in order to minimise the site run-off;
·
Manage
the construction sequences, in particular during the wet season;
·
Provide
silt removal facilities such as sand traps;
·
Provision
of 2 ha of on-site compensatory tree and shrub planting and vegetation
transplantation.
No adverse residual impact due to the operation of the
Development Site is expected after the implementation of the proposed
mitigation measures (refer to Table 9.20).
9.11.3
Sha Lo Tung Road Improvement
No adverse residual impact due to the construction and
operation of the Sha Lo Tung
Road Improvement
is expected after the implementation of the proposed mitigation measures
including restriction of earthworks
to the dry season, adoption of construction sequence, provision of
well-designed drainage systems, provision of 2 ha of on-site compensatory tree and
shrub planting and vegetation transplantation.
9.12
Environmental Monitoring and Audit
The implementation of the ecological mitigation
measures described in Section 9.10
will be included within the environmental monitoring and audit requirement as
presented in Section 12 during the
construction period.
Sha Lo Tung Valley includes Sha Lo Tung SSSI and
perennial streams, which are considered to be of high ecological and
conservation significance. To avoid
ecological risk to the downstream Sha Lo Tung Valley, any discharge of
construction runoff and wastewater from the Development Site is prohibited. The most effective way to monitor ecological
conditions is monitoring the stream habitat conditions, riparian vegetation,
adult odonate and freshwater fish (through direct observation) along Sha Lo
Tung perennial stream as well as the small pools in the wet abandoned
agricultural land at the northeast of but outside the Development Site, rather
than collecting aquatic invertebrates information, including the faunal
(particularly dragonfly nymph) species diversity and richness and individual
health conditions etc, which may involve kick sampling, netting and
caging. If the stream habitats are being
impacted by construction runoff and wastewater, there will be some signs to be
observed and immediate actions can be undertaken to rectify the problem. Therefore stream, riparian vegetation, adult
odonate and freshwater fish monitoring can obtain more useful information to
audit the implementation and effectiveness of the proposed mitigation measures
than direct fauna sampling and is less intrusive.
The major potential water quality impact and signs of
abiotic impacts associated with specific construction activities are summarised
in Table 9.20.
Table
9.20 Major
Potential Water Quality Impact and the Signs of the Abiotic Impacts
Category of Runoff and Wastewater |
Potential Water Quality Impacts |
Signs of the Abiotic Impact |
Runoff and erosion of exposed bare
soil and earth |
Increase stream water
turbidity and suspended solids |
Muddy water, usually
yellowish in colour; a thin layer of silt/ sediment covering the stream bed
(particularly the rocky bottom); rubbish observed along the stream banks and
in the stream |
Spillages of liquid stored
on-site, such as oil, diesel and solvents |
Decrease stream water DO
level and pollution of the stream water |
Oily water surface,
sometimes visible oil on the stream banks; milky water |
Wastewater generated from concrete
washing |
Increase stream water pH
value and turbidity |
Milky water |
Wastewater generated from vehicle
washing |
Decrease stream water DO
level and pollution of the stream water |
Oily water surface,
sometimes may observe oil on the stream banks; milky water |
Spillages of Sewage Effluent |
Increase stream water
nutrient loadings |
Bad smelling and turbid
water |
The signs of the abiotic impacts and the pollution
source(s) are easily identified by an Environmental Specialist/ Ecologist who
is experienced in field surveys.
Inspection of the stream conditions is therefore recommended as an
‘ecologically friendly” and effective monitoring method.
9.12.1
Daily Stream Monitoring
In addition to the site inspection, daily stream monitoring
should be undertaken along the Sha Lo Tung Stream next to the Development Site
(the stream monitoring section) as shown in Figure 12.2 during the
construction phase. No more than three
weeks prior to the commencement of the construction phase and the impact
monitoring, a baseline stream monitoring will be undertaken on three occasions
(days) for a week. Within a week after
the completion of the construction works, post-project stream monitoring will
be carried out on three occasions (days).
The qualified person (Environmentalist/ Ecologist
with at least 3 years relevant experience in field surveys) should walk along
the stream bank of the stream monitoring section to identify the signs of the
impact. Stream photographic records at
five fixed locations along the stream should be established during baseline,
impact and post-project monitoring. The
stream photographic records should be reviewed and compared so as to identify
any daily changes of the stream condition.
Should any signs of the impact observed during the stream monitoring and
confirmed or suspected to be related to the construction work activities, the
construction works should be halted immediately until the pollution source(s)
can be identified and rectified. A
Preliminary Daily Stream Monitoring Checklist is presented in Annex C of EM&A Manual.
The species composition and relative abundance of
riparian vegetation, adult odonate and fish communities along Sha Lo Tung
perennial streams (particularly in the proximity to the development site) and
the wet abandoned agricultural land are considered as biological indicators of
the aquatic habitat conditions. Any
water pollution due to uncontrolled surface runoff from the proposed
development would influence the water quality of Sha Lo Tung perennial streams
and / or pools within the wet abandoned agricultural land at the northeast of
the Development Site, and therefore also the associated floral and faunal
communities.
A baseline biological monitoring for the riparian
vegetation, adult odonate and fish communities should be conducted once during
the wet season and once during the dry season along the Sha Lo Tung Stream and
the wet abandoned agricultural land (exact location refer to Figure 12.2) prior to the commencement of any
construction works. The species
diversity, relative abundance and community structure of the riparian
vegetation, adult odonate and fishes should be recorded during the
monitoring. Riparian vegetation, as well
as the aquatic plants, encountered and their relative abundance will be
recorded with special attention to the signs of pollution, ie mud, observed on
the leave surface. Adult odonate (with
particular focus on stream specialists) will be surveyed using the transect
count method (Figure 12.2). Any adult odonate within 10
m from either side of the survey transect (stream monitoring section as
shown in Figure 12.2) will be identified and counted. The fishes (with particular focus on Hong
Kong Paradise Fish, Small Snakehead and Predaceous Chub) will be surveyed of by
direct observation and active searching/ trapping if necessary. The fishes encountered and their relative
abundance will be recorded along the stream monitoring section. The biological monitoring shall be conducted
by experienced ecologist(s) of more than 3 years experience on riparian
vegetation, adult odonate and fish communities.
The impact biological monitoring for the riparian
vegetation, adult odonate and fish communities should be conducted biweekly
through out the construction period.
Baseline and impact monitoring data, in particular the species
composition, diversity and relative abundance, should be compared, any
substantial differences in habitat characteristics (e.g., water quality,
riparian and aquatic vegetation) and the seasonality of the fauna should be
noted.
Operational monitoring, following the methodology of
the baseline stream hydrology and biological monitoring, should be conducted
quarterly within the first three years after the completion of construction
works (a total twelve occasions).
Remedial actions will be discussed with the EPD and AFCD in the event of
a change in stream hydrology (ie less stream flow) or decline in species
diversity and relative abundance of adult dragonflies and fish. Seasonal changes should be taken into account in
identifying the change
in stream hydrology (ie reduction in stream flow) or decline in species
diversity and relative abundance of adult dragonflies and fish).
The ecological impact assessment has been prepared
using the results of comprehensive literature reviews and ecological field
update surveys conducted between 2004 and 2011.
The Ecological Reserve
covers areas within Sha Lo Tung Valley and is considered of high ecological
significance. Habitats recorded include
Fung Shui Woods, secondary woodlands, grassland shrubland mosaic, streams, wet
and dry abandoned agricultural land, active agricultural land and developed
area (abandoned village). However, the
habitat quality within Sha Lo Tung Valley is degrading due to threats such as
the use of four wheel drive vehicles, hill fires, wargames and vegetation
removal.
The Development Site is mainly covered by
grassland-shrubland mosaic with a small part of the area occupied by secondary
woodland and developed area. The
grassland-shrubland mosaic is frequently disturbed by hill fire and is
considered to have low to moderate ecological value. The secondary woodland is dominated by climax
native tree species such as Schima
superba with densely vegetated understorey and is considered of moderate to
high ecological value. Faunal species of
conservation interest recorded within the Development Site included Greater
Coucal, Lesser Coucal, Hwamei, Savannah Nightjar with sighting of the Crested
Serpent Eagle flying overhead. Floral
species of conservation interest included Bamboo Orchid and Willow-leaved
Camellia.
Habitats within the Sha Lo Tung Road Improvement area
include secondary woodland, plantation, grassland-shrubland mosaic and
developed area. The secondary woodland
is of moderate to high ecological value, the grassland-shrubland mosaic of low
to moderate ecological value, the plantation of low ecological value and the
developed area of negligible ecological value.
Species of conservation interest recorded along the Sha Lo Tung Road
Improvement included Incense Tree, Lamb
of Tartary, Hong Kong Pavetta, Rhodoleia, Common Tutcheria and Cycad fern and all the same bird species of
conservation interest as found in the Development Site, with the addition of
the Emerald Dove and a Common Buzzard flying overhead. In addition, evidence of the Masked Palm
Civet, a mammal of conservation interest (from scats observed on the road) was
also recorded.
The enhancement works for the
establishment of the Ecological Reserve and the implementation of the
Conservation Management Plan will enhance the conservation value of Sha Lo Tung
Valley. In addition, human disturbance such as
hill fire will be largely reduced/ controlled.
As a consequence, the proposed Project is expected to bring about long term and sustainable
benefits to the ecology of Sha Lo Tung Valley and the habitats and associated
wildlife.
Direct habitat loss may result from the land taken for
the construction of proposed buildings and facilities as well as the Sha Lo
Tung Road improvement works. The
majority of the proposed development will be constructed on the grassland-shrubland
mosaic and
thereby reduce the impacts on the secondary woodland. The proposed development also avoided impacts
to the wet abandoned agricultural land and the associated aquatic species of
conservation interest.
With the provision of a 20 m
building buffer from Sha Lo Tung SSSI, the riparian woodlands which served as
wildlife (particularly Family Gomphidae dragonflies) foraging/ roosting grounds
are significantly preserved. The
small-sized habitat loss due to the proposed development is not predicted to
cause adverse impacts to the wildlife using the SLT SSSI and associated
habitats. The ecological impacts on the
larval stage of the dragonfly community in the SSSI due to the water quality
impacts from the construction activities are likely to be avoided through water
pollution control measures. No unacceptable ecological
impacts during the construction and operational phases are expected based on
the current design given that appropriate mitigation measures are properly
implemented, including the key measures listed below:
·
minimisation of the permanent development footprint
within the Development Site, occupying only 1.625 ha of development footprint
out of the 4.1 ha Development Site (comprised only about 39.6% of the total
site area);
·
detailed engineering
design avoiding habitat and vegetation loss;
·
completion of the Sha Lo Tung Road
improvement (with well designed drainage systems) before any construction works
for the Development Site;
·
managing the construction
sequences and in the dry season, careful scheduling of the earthworks;
·
provision of an additional 20 m non-building buffer
between the works area and Sha Lo Tung SSSI;
·
adoption of a phased schedule;
·
compensatory
planting;
·
vegetation
transplantation;
·
good construction
practice;
·
a well
designed temporary drainage system;
·
provision of silt removal facility;
·
erection of site
hoarding in advance of the commencement of any works;
·
proper visitor control (particularly during special
festivals); and,
·
restricting the
workers within the Development Site during construction.
No adverse residual water quality or
associated ecological impacts were predicted to occur due to construction and
operation of the Project on the basis that the recommended mitigation measures
are adopted in full.
Table
9.21 Key ecological impact
assessment and the associated mitigation measures
(I) Improvement to Sha Lo Tung Road |
|||||||||
Phase |
Activities & impact, disturbance |
Types of impact (s.5.2.3 Annex 16 of TM) |
Affected habitat : type, size, distance |
Affected species of conservation interest (Note 3 Annex
16 of TM) |
Ecological importance of affected habitats (Table 2 Annex
8 of TM) |
Design consideration/ changes to avoid and minimize
impact |
Significance of ecological impact (Table 1 Annex 8, s.5.3
Annex 16 of TM) |
Mitigation measures |
Residual impact & acceptability |
Construction |
Site formation (habitat loss) |
Direct - Permanent loss of
habitats disturbance to wildlife/
vegetation |
Woodland (0.2 ha) |
Plant (Incense Tree,
Lamb of Tartary, Hong Kong Pavetta, Cycad Fern) Bird (Emerald Dove) |
Moderate to high |
l
Minimal widening to single track access road to meet
safety standard l
Follow the existing road alignment and profile to minimise
earthworks l
Road widened towards non-woodland side. l
Soil nailing to avoid/ minimise loss of vegetation and
trees |
Low |
l
All sites of importance (Country Parks, SSSI, CA) avoided l
Avoid species of conservation importance during detailed
design stage as far as possible l
Transplantation of species of conservation importance l
A total of 2 ha of on-site compensatory tree and shrub
planting using native species |
No adverse residual
impact anticipated after implementation of mitigation measures |
|
|
Plantation (0.43 ha) |
Plant (Rhodoleia, Common
Tutcheria Lamb of Tartary) |
Low |
Low |
l
Avoid/minimise impact on species of conservation importance
during detailed design stage as far as possible l
Transplantation of species of conservation importance l
compensatory woodland planting and landscape planting
proposed would be an enhancement measure |
No adverse residual impact
anticipated after implementation of mitigation measures |
||
|
|
Shrubland-grassland
mosaic (0.65 ha) |
Bird (Hwamei, Lesser
Coucal and Common Buzzard) |
Low |
Low |
l
None required |
No adverse residual
impact anticipated |
||
|
|
Developed Area (1.08 ha) |
Bird (Savannah Nightjar) Mammal (Masked Palm Civet) |
Negligible |
Negligible |
l
None required |
No adverse residual
impact anticipated |
||
|
Construction Runoff
(suspended solids and contaminants) |
Indirect – deterioration of
environmental qualities |
Surrounding habitats and
associated flora and fauna |
- |
High for streams at Sha
Lo Tung; Moderate for streams at
Fung Yuen |
l
Majority of earthworks scheduled in dry seasons l
Construction sequence managed in order to limit the volume
of surface runoff and treated effluent generated on-site l
Well designed temporary drainage system (which will pump
away the construction runoff without discharge into the Sha Lo Tung catchment
area) |
Low to moderate |
l
Majority of earthworks scheduled in dry seasons l
Construction sequence managed in order to limit the volume
of surface runoff and treated effluent generated on-site l
Well designed temporary drainage system (which will pump
away the construction runoff without discharge into the Sha Lo Tung catchment
area) l
Good construction practices |
No adverse residual
impact anticipated after implementation of mitigation measures |
|
Human activities (noise
impact, and disturbance.) |
secondary - disturbance to wildlife
and vegetation |
Surrounding habitats and
associated flora and fauna |
- |
- |
- |
Low to moderate |
l
Major earthworks undertaken only during dry seasons l
Good site practice/ environmental management measures l
Regular checks on construction boundaries |
No adverse residual impact
anticipated after implementation of mitigation measures |
|
Habitat Fragmentation
and Isolation |
secondary - Habitat fragmentation |
- |
- |
- |
l
Improvement work undertaken along the existing road l
Small scale of habitat loss in the context of the
surrounding similar habitats |
Minimal |
l
Refer to the design consideration |
No adverse residual
impact anticipated after implementation of proper design |
Operation |
Surface runoff |
secondary - deterioration of
environmental qualities |
Surrounding habitats and
associated flora and fauna |
- |
High for streams at Sha
Lo Tung; Moderate for streams at
Fung Yuen |
l
The improved Sha Lo Tung Road and the new car park within
the Development Site will be kerbed and will have back of kerb filter drains,
trapped road gullys and a piped stormwater system. This will discharge run-off to a pumping
station located beneath the car park area with all flows being discharged back
over the crest of the access road and into the structured road drainage to be
provided as part of the road improvements.
l
Drainage channel with drainage traps such as sandtraps,
grease traps and petrol interceptors and sewer pipeline will be present along
the road. l
The pumping station pumps and wet well will be sized to
control the rate of discharge from the development vehicular zone such that
the road drainage system will not be overloaded. Removing the upgraded Sha Lo Tung Road and
car park runoff from the Development Site will not only eliminate the risk of
oil leakage spillage contaminating the natural stream courses it will also
offset the potential for increased runoff from the proposed Development Site
and therefore maintain the hydrological balance of the Sha Lo Tung stream
system. |
Positive |
l
Refer to the design consideration |
No adverse residual
impact anticipated after implementation of proper design |
|
Increase traffic (road
kills) |
secondary - disturbance to wildlife |
- |
Wildlife crossing the
road |
- |
l
Minimal widening to single track access road to meet
safety requirements l
Follow the existing road alignment and profile to minimise
earthworks l
The improved Sha Lo Tung road will not have street
lighting installed |
Minimal |
l
Refer to the design consideration |
No adverse residual
impact anticipated after implementation of proper design |
(II) Development Site |
|||||||||
Phase |
Activities & pollutants, disturbance |
Types of impact (s.5.2.3 Annex 16 of TM) |
Affected habitat : type, size, distance |
Affected species of conservation interest (Note 3 Annex
16 of TM) |
Ecological importance (Table 2 Annex 8 of TM) |
Design changes to avoid and minimize impact |
Significance of ecological impact (Table 1 Annex 8, s.5.3
Annex 16 of TM) |
Mitigation measures |
Residual impact & acceptability |
Construction |
Site formation for the
construction of the Nature Interpretation Centre, Multi-Cultural Education Retreat
cum Columbarium, and associated facilities |
Direct – Permanent loss of
habitats Disturbance to wildlife/
vegetation Habitat fragmentation
and isolation |
Secondary Woodland
(0.03ha) Sha Lo Tung
(SLT) SSSI Stream |
Plant (Willow-leaved Camellia)
Bird (Hwamei, Greater Coucal,
Lesser Coucal, Savannah Nightjar and Crested Serpent Eagle) Fish (Hong Kong Paradise
Fish, Small snakehead and Predaceous Chub) (a few individuals
recorded; none of significant population) |
Moderate to high |
l
The preliminary Master Layout Plan minimised the building
footprint within the Development Site.
Although the total area of the Development Site is approximately 4.1
ha, the land take for the development including building structures, areas
for site office and stockpile during construction, cut slope and sitting out
areas, as well as the proposed landscape hardworks, is approximately 1.625 ha
(comprised only about 39.6% of the total site area); l
Provide a minimum of 20 m additional buffer area off the existing
SSSI zone in order to further safeguard the Sha Lo Tung Stream which has been
preserved by the existing general 30 m buffer areas (designated under the
SSSI zone). The construction works are
hence generally of 50 m from any stream course; l
Minimise the permanent and temporary cutting areas; l
Minimise the footprint of the temporary access road within
the site; l
No encroachment to Conservation Area and Pat Sin Leng
Country Park; and l
No night time construction works within the Development
Site l
Layout design minimised woodland loss l
Avoided wet abandoned agricultural land at the northeast
of the Development Site |
Low |
l
Avoid all important habitats including Sha Lo Tung Valley
core areas, SSSIs; and CA l
Avoid major woodland stand (about 92% of the woodland to
be preserved) and associated plant species of conservation importance within
Development Site l
20m non-building buffer from SLT SSSI l
Transplantation of plant species of conservation
importance before commencement of work l
Implement good site practice l
Provide a total of 2 ha of on-site compensatory tree and
shrub planting |
No adverse residual
impact anticipated after implementation of mitigation measures |
|
|
Grassland shrubland Mosaic
(1.6ha lost, 0.01 ha disturbed); |
Plant (Bamboo Orchid) Bird (Crested Serpent
Eagle [flying overhead], Lesser Coucal, Greater Coucal, Hwamei and Savannah
Nightjar) (a few individuals
recorded; none of significant population) |
Low to moderate |
Low |
l
Transplantation of Bamboo Orchid to nearby
grassland-shrubland mosaic l
Reinstatement of works area |
No adverse residual
impact anticipated after implementation of mitigation measures |
||
|
|
Developed Area (0.06ha) |
None |
Negligible |
Negligible |
None required |
No adverse residual
impact anticipated |
||
|
Construction runoff
(contains suspended solids and contaminants) |
Indirect – deterioration of
environmental qualities |
Nearby section of SLT
SSSI Stream and surrounding habitats |
Fish (Hong Kong Paradise
Fish; Predacious Chub, Small Snakehead) Dragonfly (Chinese
Tiger) |
High (stream); moderate
(wet abandoned agricultural land) |
l
Provide a minimum of 20 m additional buffer area off the
existing SSSI zone in order to further safeguard the Sha Lo Tung Stream which
has been preserved by the existing general 30 m buffer areas (designated
under the SSSI zone). The construction
works are hence generally of 50 m from any stream course; l
Carefully site developments to avoid encroachment and possible
construction runoff to the sensitive stream course at northern side of the
site; l
Minimise the permanent and temporary cutting areas; l
Minimise the footprint of the temporary access road within
the site; l
Divide the works into three stages to minimise the
concurrent works within the site (Sha Lo Tung Road improvement with its
drainage network will be completed prior to any construction works undertaken
within the Development Site); l
Start with the construction at southern side to minimize
any impact to the ecological sensitive stream to the north of the site. l
Undertake earthworks (soil excavation and filling works)
during the dry season (November to March); l
Provide well designed temporary drainage systems around
the entire Development Site in advance in order to ensure no construction
runoff discharge to Sha Lo Tung Stream and Conservation Area; |
Moderate |
l
Complete the Sha Lo Tung Road Improvement (with well
designed drainage systems and sewers) before any construction works are
undertaken within the Development Site l
Restrict earthworks to the dry season in order to minimise
the site run-off Major earthworks scheduled in dry seasons l
Adoption of construction sequences, in particular during
the wet season, in order to limit the size of exposed area and volume of the
surface runoff, the construction activities will be carried out sequentially
(phase by phase and sub-area to sub-area) rather than in parallel l
Provide peripheral temporary drainage channels with
sandtraps prior to the
commencement of the construction works; l
Provide silt removal facilities l
Provide a separate temporary drainage system to divert the
natural upslope runoff away from the site and minimise the site runoff l
Contained construction site by erect continuous site hoardings/
chain-link fence with seal in order to contain the run-offs within the site
and avoid overflow into Sha Lo Tung Stream to avoid spillage of runoff l
Carry out daily inspection to monitor the effectiveness of
the measures by an on-site conservation specialist l
Implement good construction practices |
No adverse residual
impact anticipated after implementation of mitigation measures |
|
Domestic sewage effluent |
Indirect – deterioration of
environmental qualities |
SLT SSSI Stream |
Aquatic fauna including
fish and dragonfly species of conservation importance |
High |
No discharge of treated
or untreated sewage on site |
minimal |
l
Portable chemical toilets deployed for the site workers at
a location away from the SSSI as much as possible and surrounded by temporary
interceptor drains l
Licensed contractor appointed for appropriate maintenance |
No adverse residual
impact anticipated after implementation of mitigation measures |
|
Change in Hydrology and
Flow Regime |
Indirect – disturbance to wildlife,
especially dragonflies, stream macroinvertebrates and freshwater fishes |
SLT SSSI Stream |
Aquatic fauna including
fish and dragonfly species of conservation importance |
High |
l
The overall design philosophy for the stormwater drainage
is to retain the rainfall-runoff response as close to the existing regime as
possible to minimise impacts. l
Minimised footprint such that the influence of the
development drainage on adjacent Catchment Basins will be only about 0.3%. |
Minor |
l
None required l
Woodland planting will improve water holding capacity of
catchment |
No adverse residual
impact anticipated after implementation of mitigation measures |
|
Human activities (noise
and disturbance) |
Secondary - disturbance
to wildlife and vegetation |
Surrounding habitats (in
particular woodland immediately outside site boundary and SLT SSSI Stream
>20m away from site boundary) |
Flora and fauna species
of conservation importance recorded in the surrounding habitats |
- |
- |
Low to moderate |
l
Demarcate the boundary of Pat Sin Leng Country Park,
Conservation Area, Sha Lo Tung SSSI and the Development Site prior the
commencement of construction activities.
The working site should be enclosed by site hoarding which will
restrict all of the work activities within the Development Site boundary l
Erect fences along the boundary of the works area within
the Development Site before the commencement of works to prevent vehicle
movements, and encroachment of personnel, onto adjacent areas in particular
the Pat Sin Leng Country Park, Conservation Area and Sha Lo Tung Valley
(including Sha Lo Tung SSSI and streams);
l
Restrict the number of workers within the Development Site
during construction and request workers do not enter the ecologically
sensitive areas, such as the Sha Lo Tung SSSI (unless necessary for the works
to be undertaken in the Ecological Reserve) during working hours, throughout
the construction phase; l
Regularly check the work site boundaries to ensure that
they are not breached and that damage does not occur to surrounding areas in
particular the Pat Sin Leng Country Park, Conservation Area and Sha Lo Tung
Valley (including Sha Lo Tung SSSI and streams); l
No night time construction works within the Development
Site. |
No adverse residual
impact anticipated after implementation of mitigation measures |
Operation |
Surface runoff |
Indirect – deterioration of
environmental qualities |
Surrounding habitats (in
particular woodland immediately outside site boundary and SLT SSSI Stream
>20m away from site boundary) |
Aquatic fauna species of
conservation importance recorded in the surrounding habitats |
High |
l
The overall design philosophy for the stormwater drainage is
to retain the rainfall-runoff response as close to the existing regime as
possible to minimise impacts. l
The improved Sha Lo Tung Road and car park within the
Development Site will be kerbed and will have back of kerb filter drains, trapped
road gullys and a piped stormwater system.
This will discharge run-off to a pumping station located beneath the
car park area with all flows being discharged back over the crest of the
access road and into the structured road drainage to be provided as part of
the road improvements. l
The pumping station pumps and wet well will be sized to
control the rate of discharge from the development vehicular zone such that
the road drainage system will not be overloaded. Removing the upgraded Sha Lo Tung Road and
car park runoff from the Development Site will not only eliminate the risk of
oil leakage spillage contaminating the natural stream courses it will also
offset the potential for increased runoff from the proposed Development Site
and therefore maintain the hydrological balance of the Sha Lo Tung stream
system. l
For non-vehicular development areas porous or semi
permeable paved surfaces will be used in association with grassed swales and
soakaways to attenuate run-off.
Terraced construction will control the rate of surface runoff with
catchpits providing oxygenation and solids removal at the steps formed. The run-off from the development
non-vehicular zone will be routed to pass through grit separators beneath the
proposed car park to remove sediments associated with “first flush” flow. |
minimal |
l
Refer to the design consideration. |
No adverse residual
impact anticipated after implementation of proper design and mitigation
measures |
|
Light pollution |
Indirect - disturbance
to wildlife |
- |
Wildlife in the area |
- |
l
Minimal lighting design approach l
Non-reflective, subdued coloured materials and finishes l
Major lighting sources pointed inward and downwards l
Non-essential lighting be switched off in the middle of
the night |
Minor |
l
Refer to the design consideration |
No adverse residual
impact anticipated after implementation of proper design |
|
Vegetation maintenance
(likely use of chemicals) |
Indirect - disturbance
to wildlife |
SLT SSSI Stream |
Aquatic fauna recorded
in SLT SSSI Stream |
High |
- |
Minor |
l
Use of pesticides, insecticides and chemical fertilizers
not allowed l
Use of organic fertilizers, if needed, will require
approval of relevant authorities |
No adverse residual
impact anticipated after implementation of mitigation measures |
|
Accidental Hillfire |
Secondary - disturbance
to wildlife and vegetation |
Surrounding natural
habitats including woodland and Ecological Reserve |
Species recorded in
woodland habitats and ecological reserve |
Moderate to High
(woodland), high (ecological reserve) |
l
No burning of effigies and paper offerings be allowed at
the Multi-Cultural Education Retreat cum Columbarium. l
Well managed columbarium to replace unorderly graves within
the development site |
Positive as current
hillside grave sites within development site will be removed |
Enhancement measures: l
Setup Quick Fire Response Team l
Provision of emergency access for fire engines available after
the improvement of Sha Lo Tung Road l
Pro-active management including patrolling |
No adverse residual
impact anticipated after implementation of mitigation measures |
|
Human Activities and
Disturbance (especially during festival days) |
Secondary - disturbance
to wildlife and vegetation |
Surrounding natural
habitats including Ecological Reserve |
- |
High |
l
Sha Lo Tung Valley will be properly managed under the
proposed Pilot Project for PPP Scheme, human activities (ie grave sweeping)
will be restricted to within the Development Site, and no burning of effigies
and paper offerings will be allowed. l
Designs of the Multi-Cultural Education Retreat and
Columbarium (by provision of fencing and landscape planting) will manage visitors’
activities within the site and encourage them not to wander into the adjacent
Pat Sin Leng Country Park and Sha Lo Tung SSSI, particularly during festival
days. l
In addition the Development Site will have ample space for
visitors to relax without having to “spill over” to the natural habitats. |
low |
l
The Nature Interpretation Centre will also be closed
during those days to avoid attracting people wander within the Ecological
Reserve. l
Special traffic arrangements will be implemented during important
Festivals (ie Ching Ming or Chung Yeung) to control the number of vehicles
and people to the Development Site.
Buyers of Class A niches (20,000) might visit the Columbarium at any
time but prior booking would be required during festival days. l
During the Festive periods, only the proponent’s shuttle
buses and emergency vehicles will be allowed to use Sha Lo Tung Road. Only eligible ticket holders with prior
booking would be allowed to take the shuttle.
l
Buyers of Class B niches (40,000) would not be allowed to
visit the Columbarium during the festival days. l
Control points would be set up and visitors who walk up
the SLT Road without valid tickets would not be allowed to enter the
Columbarium. l
Visitors to the columbarium will not be allowed to walk up
Sha Lo Tung Road unless directed by the Police when need arises. Visitors will only be allowed to leave the
columbarium through the shuttle buses so as to avoid human disturbance to Sha
Lo Tung Valley. l
On site staffs will also patrol the Columbarium more
frequent to ensure no incompatible activities to be undertaken, ie littering,
burning of effigies and paper offerings. l
Sufficient staff would be deployed by the SLTDC in the
Columbarium for crowd control purpose.
It should be noted that the above arrangement only applies to visitors
to columbarium, visitors to the trails and Country Park will not be affected. l
Provide sufficient Conservation Ambassadors (ie 30 people,
organised by Green Power), who will serve as reserve guards to advise, control
and educate visitors of the regulations in the Ecological Reserve, during
special festivals, ie Ching Ming or Chung Yeung. |
No adverse residual
impact anticipated after implementation of proper design and mitigation
measures |
|
Risks of Landslides |
Secondary - potential
risk of landslide |
Surrounding natural
habitat |
- |
- |
l
It is expected that where existing slopes within the
Development Site are found to be below current safety standards, they are recommended
for upgrading works that should have involved careful assessment of the
geological and groundwater condition, likely modes of failure and detailed
design in accordance with relevant Practice Note for Authorized Persons
(PNAP) and Geotechnical Manual for Slopes with adopting a minimum factor of
safety of 1.4 for these engineered slopes.
|
minor |
l
Proper slope maintenance l
Route inspections by
a chartered engineer and enhanced maintenance using prescriptive measures |
No adverse residual impact
anticipated |
|
Change in Hydrology and Flow Regime |
Secondary - disturbance
to wildlife |
SLT SSSI Stream |
Aquatic fauna in SLT
SSSI Stream |
High |
l
The detailed approach presented in Appendix C determines separate natural catchment areas that are
within and/or affected by the proposed development. After identifying the sub-divisions in the
natural topography based on their drainage characteristics it is possible to
develop mitigation measures to minimize the impact of the development on the
existing drainage system and in particular the discharge into Sha Lo Tung
Stream. The approach to drainage
impact mitigation measures has as an overriding objective to retain and
maintain the existing quality and quantity of water flow into the natural
stream systems downstream of the Sha Lo Tung Development Site (details refer
to Section 9.9.2). |
minimal |
l
Refer to the design consideration. l
Minimise the creation of impermeable surfaces, encouraging
natural ground water recharge through soakaways/filter drains. l
Control run-off attenuation using swales, naturally lined
channels, catchpits, and grit separators with outlet control and undeveloped
buffer zones. |
No adverse residual impact
anticipated after implementation of proper design and mitigation measures |
(III) Ecological Reserve (CMP, fencing at Lei
Uk, temporary bridge, future village houses, etc) |
|||||||||
|
Activities & pollutants, disturbance |
Affected habitat : type, size, distance |
Types of impact (s.5.2.3 Annex 16 of TM) |
Affected species of conservation interest (Note 3 Annex
16 of TM) |
Ecological importance (Table 2 Annex 8 of TM) |
Design consideration/changes to avoid and minimize impact |
Significance of ecological impact (Table 1 Annex 8, s.5.3
Annex 16 of TM) |
Mitigation measures |
Residual impact & acceptability |
Construction |
Installation of a drop
bar at the road entrance to Sha Lo Tung Valley to prevent vehicular access to the Ecological Reserve, but
no restriction for the access of walkers/ Country Park visitors/ villagers |
Developed Area (minimal size) |
Direct – disturbance of
vegetation |
- |
Negligible |
l
No major excavation works /machinery required |
Positive as it can
prevent vehicular access to the Ecological Reserve |
l
Footprint will avoid SSSIs and CA l
No machinery/Use of handtools only |
No adverse residual impact
anticipated after implementation of mitigation measures |
|
Temporary footbridge
across the Sha Lo Tung SSSI Stream to Lei Uk and associated minor
improvements of the existing new footpath such as vegetation removal for transporting
materials to fencing site |
Wet abandoned
agricultural land (minimal size) |
Direct and temporary –
disturbance of vegetation |
- |
Moderate |
l
Footbridge mainly made of wooden materials with small
concrete footings l
Prefabricated timber sections and construction materials
hand carried to the proposed site for in-situ assembling on site l
Sitting of footings away from stream and avoid dense vegetated areas as
far as practicable l
Temporary access in the form of metal scaffolding may be
formed on the areas near both sides of the existing stream where there is
level difference |
Minor |
l
Installation during day-time in the dry season l
Use of handtools only l
Footbridge to be removed and site resintated upon
construction of fencing l
No vehicles except buggies for transportation of materials |
No adverse residual
impact anticipated after implementation of mitigation measures |
|
Permanent
fencing at Lei Uk |
Developed Area (village) (minimal size) |
Direct – disturbance of vegetation |
- |
Negligible |
l
Minimal soil excavation required for the posts and fence
installation |
Negligible |
l
No machinery/Use of handtools only l
No vehicles except buggies for transportation of materials |
No adverse residual impact
anticipated after implementation of mitigation measures |
|
Compensatory planting
and transplantation of species of conservation importance |
Mainly grassland-
shrubland Mosaic |
Indirect – enhancement
planting |
- |
Low |
l
planting will avoid sensitive habitats |
Positive |
l
No machinery/Use of handtools only |
Positive impact achieved
under CMP |
|
Implementation of
Conservation Management Plan (CMP) - Ecological surveys, research and
monitoring |
Throughout Ecological
Reserve including SLT SSSI Stream |
- |
Target species for
conservation |
High |
- |
Positive |
l
Surveys conducted by ecologists and trained personnel |
Positive impact achieved
under CMP |
|
Implementation of CMP - Trail
design and improvement |
Developed Area, Dry and
Wet Abandoned Agricultural Land |
- |
- |
Low/ Moderate (Wet Abandoned
Agricultural Land) |
- |
Positive |
By manual works with
stones and weeding, or by small-scale machines |
Positive impact achieved
under CMP |
|
Implementation of CMP -
Placement of signage and education display |
Along trails |
- |
- |
Negligible |
l
Avoid vegetated areas |
Negligible |
l
Avoid encroachment of sensitive habitats l
No machinery/Use of handtools only |
No adverse residual impact
anticipated |
Operation |
Implementation of CMP -
vegetation management including weed removal, enhancement planting, woodland
planting, butterfly garden planting, plant nursery |
Throughout Ecological
Reserve |
Direct – habitat
enhancement |
Target species for
conservation |
High |
- |
Positive |
l
No machinery/Use of handtools only |
Positive impact achieved
under CMP |
|
Implementation of CMP -
organic farming demonstration site |
Wet abandoned agricultural
land near Cheung Uk (outside SLT SSSI Stream) |
Direct – habitat
restoration |
- |
Moderate |
- |
Positive |
Site selection: l
Avoid areas within SLT SSSI Stream l
Avoid area with sightings of species of conservation
importance |
Positive impact achieved
under CMP |
|
Implementation of CMP -
Trail maintenance |
Developed Area |
- |
- |
Negligible |
- |
Negligible |
By manual works with
stones and weeding, or by small-scale machines upon approval of EPD and AFCD |
No adverse residual
impact anticipated |
|
Implementation of CMP -
Ecological surveys, research and monitoring |
Throughout Ecological
Reserve |
- |
Target species for
conservation |
High |
- |
Positive |
l
Surveys conducted by ecologists and trained personnel |
Positive impact achieved
under CMP |
|
Implementation of CMP -
active control of destruction activities including use of four wheel drive
vehicles, hill fires, wargames, illegal trapping and vegetation removal |
Throughout Ecological
Reserve |
Indirect – habitat
management |
Species in Ecological
Reserve |
High |
- |
Positive |
- |
Positive impact achieved
under CMP |
|
Potential increase in
number of visitors in terms of country park hikers and ecological reserve
visitors |
Mainly on public trails
and education trails |
Secondary - disturbance
to wildlife and vegetation |
- |
High |
- |
Minor |
l
Restrict general visitors access to public trails and
guided tours’ access to education trails l
restricted access to sensitive areas by gate, signage,
planting l
Restrict size of guided tours (40 people each group) and
number of tours (2 per day) l
Staff patrolling (eg for vandalism) and monitoring l
Provision of sufficient Conservation Ambassadors during
festival days (served as reserve guards to control, advise and educate
visitors) l
Closure of Nature Interpretation Centre during festival
days to discourage visitors to Ecological Reserve l
Maintain records of visitor numbers to evaluate potential
impact l
Provide guidance on code of behaviour |
No adverse residual
impact anticipated after implementation of mitigation measures |
|
Potential development
pressure within V zone at Sha Lo Tung Valley |
4 unpurchased lots
(where only 2 lots are village houses) at V zone (<1% of total area
within the Ecological Reserve |
Indirect - disturbance
to wildlife and vegetation |
Species in Ecological
Reserve |
Negligible |
l
Under the PPP Scheme, SLTDC envisages the surrender of
these lots would reduce village housing pressure within such “V” zones. l
There are only four unpurchased private lots (only 2 lots
are village houses) within two of the three “V” zones (as indicated in Figure 2.3). l
The prevailing Outline Zoning Plan specified that any additional,
modification or redevelopment of existing buildings within “V” zone would
require permission from the Town Planning Board. l
The conservation intention of the Sha Lo Tung Valley and
the potential impacts of NTEH on the ecological sensitive Sha Lo Tung Valley
would be critical considerations among others in considering redevelopment of
NTEH on unpurchased building lots in “V” zones. l
To address local demand for NTEH sites under the Small
House Policy, the project proponent has entered into mutual agreement with
village representatives to divert NTEH demand amounting to 160 NTEH sites
outside the SLT Valley. l
Information from the Lands Department reveals that the
majority of eligible indigenous villagers in SLT Valley had applied for
building small houses outside SLT Valley.
l
It is anticipated that this trend will continue as
conservation of the Valley proceeds. l
The improvement of SLT Road will have no bearing on this
trend, as accessibility to the “V” zones would not be improved. |
Positive |
l
Refer to the design consideration |
No adverse residual
impact anticipated after implementation of mitigation |
|
Villager activities |
4 unpurchased lots
(where only 2 lots are village houses) at V zone (<1% of total area
within the Ecological Reserve |
Indirect - disturbance
to wildlife and vegetation |
Species in Ecological
Reserve |
Negligible |
l
No electrical/water supply will be re-provided in the V
zone l
No vehicular access in Ecological Reserve |
Minimal |
l
Enforced regulation/code and regular patrol of the
Ecological Reserve to prevent unlawful and improper activities l
Pro-active management, including patrolling and
conservation education. |
No adverse residual
impact anticipated after implementation of mitigation measures |