Table of Contents

  ii

7.               LANDSCAPE AND VISUAL IMPACTS. 7-1

7.1            Introduction. 7-1

7.2            Environmental Legislation, Standards and Guidelines. 7-1

7.3            Assessment Methodology. 7-1

7.4            Scope and Content of the Study. 7-6

7.5            Review of Planning and Development Control Framework. 7-7

7.6            Baseline Study. 7-8

7.7            Landscape Impact Assessment 7-27

7.8            Visual Impact Assessment 7-28

7.9            Landscape and Visual Mitigation Measures. 7-33

7.10         Residual Impacts. 7-35

7.11         Environmental Monitoring and Audit 7-48

7.12         Conclusion. 7-48

 

LIST OF TABLES

Table 7-1                  Significance Thresholds. 7-4

Table 7-2                  Summaries of the Tree Survey Recommendations. 7-12

Table 7-3                  Potential Sources of Landscape Impacts during Construction Phase. 7-14

Table 7-4                  Potential Sources of Landscape Impacts during Operation Phase. 7-14

Table 7-5             Magnitude of Landscape Impacts during Construction and Operation Phases. 7-15

Table 7-6                  Potential Sources of Visual Impacts during Construction Phase. 7-20

Table 7-7                  Potential Sources of Visual Impacts during Operation Phase. 7-20

Table 7-8                  Visual Sensitive Receivers (VSRs) and their Sensitivity. 7-21

Table 7-9                  Magnitude of Change on Visually Sensitive Receivers before Mitigation. 7-24

Table 7-10               Proposed Construction Phase Mitigation Measures. 7-34

Table 7-11               Proposed Operation Phase Mitigation Measures. 7-34

Table 7-12               Significance of Landscape Impacts in Construction and Operation Phases (LRs & LCAs) 7-38

Table 7-13               Significance of Visual Impacts during Construction and Operation Phases (VSRs) 7-45

 

 

 

LIST OF FIGURES

 

Figure 7.1            Layout Plan for LVIA

Figure 7.2            Landscape Resources Plan

Figure 7.3            Landscape Character Areas Plans

Figure 7.4            Visual Sensitive Receivers Plans

Figure 7.5A         Photographic Records of Key Landscape Resources (Sheet 1 of 2)

Figure 7.5B          Photographic Records of Key Landscape Resources (Sheet 2 of 2)

 

Figure 7.6            Photographic Records of Landscape Character Areas

Figure 7.7A         Photographic Records of Key Visually Sensitive Receivers (Sheet 1 of 3)

Figure 7.7B          Photographic Records of Key Visually Sensitive Receivers (Sheet 2 of 3)

Figure 7.7C          Photographic Records of Key Visually Sensitive Receivers (Sheet 3 of 3)

Figure 7.8A         Tree Survey Layout Plan

Figure 7.8B          Landscape Master Plan

Figure 7.9            Mitigation Details

Figure 7.10          Potential Landscape Impacts without Mitigation in Construction Phase

Figure 7.11          Potential Landscape Impacts without Mitigation in Operation Phase

Figure 7.12          Potential Visual Impacts and Sensitivities without Mitigation in Construction Phase

Figure 7.13          Potential Visual Impacts and Sensitivities without Mitigation in Operation Phase

Figure 7.14          Residual Landscape Impacts and Sensitivities with Mitigation in Construction Phase

Figure 7.15A       Residual Landscape Impacts and Sensitivities with Mitigation in Operation Phase (Day 1)

Figure 7.15B        Residual Landscape Impacts and Sensitivities with Mitigation in Operation Phase (Year 10)

Figure 7.16          Residual Visual Impacts and Sensitivities with Mitigation in Construction Phase

Figure 7.17A       Residual Visual Impacts and Sensitivities with Mitigation in Operation Phase (Day 1)

Figure 7.17B        Residual Visual Impacts and Sensitivities with Mitigation in Operation Phase(Year 10)

Figure 7.18          Photomontages of Proposed Flyover from Kwai Tsing Interchange Upramp to Kwai Chung Road

 

 

 


7.                       LanDSCAPE and VISUAL IMPACTS

7.1                   Introduction

7.1.1      The aim of this Section of Report is to assess the potential landscape and visual impacts arising from the construction and operation of the Project and associated works and to propose measures to mitigate these impacts.

7.2                   Environmental Legislation, Standards and Guidelines

7.2.1      The following Legislation, Standards, Guidelines and Criteria are applicable to the evaluation of landscape and visual impacts associated with the construction and operation of the project:

·      Environmental Impact Assessment Ordinance (Cap. 499) and the Technical Memorandum on EIA Process (EIAO-TM), particularly Annexes 10, 11, 18, 20 and 21;

·      EIAO Guidance Note 8/2010 on Preparation of Landscape and Visual Impact Assessment under the EIAO;

·      ETWB TCW No. 10/2013 on Tree Preservation;

·      ETWB TCW No. 2/2004 on Maintenance of Vegetation and Hard Landscape Features;

·      ETWB TCW No. 29/2004 on Registration of Old and Valuable Trees, and Guidelines for their Preservation;

·      Highways Department Technical Circulars, HyD TC No. 3/2008 on Independent Vetting of Tree Works under the Maintenance of Highways Department;

·      Highways Department Guidelines, HQ/GN/13 on Interim Guidelines for Tree Transplanting Works under Highways Department’s Vegetation Maintenance Ambit;

·      Highways Department Guidelines, HQ/GN/15 – Guidelines for Greening Works along Highways;

·      Requirements for Handover of Vegetation to Highways Department (2013 version);

·      WBTC No. 7/2002 – Tree Planting in Public Works;

·      ETWB TCW No. 02/2013 – Greening on Footbridges and Flyovers;

·      GEO Publication No. 1/2011 - Technical Guidelines on Landscape Treatment for Slopes (2011);

·      Protection of Endangered Species of Animals and Plants Ordinance (Cap. 586) and;

·      Related Statutory Plans, e.g. Outline Zoning Plans.

7.3                   Assessment Methodology

Introduction

7.3.1      The Landscape and Visual Impact Assessment (LVIA) in this study follows the methodology as listed below:-

·      Identification of potential impact receivers including landscape resources, landscape characters and the zones of visual influence. The sensitivity of the landscape framework and its ability to accommodate change are focused.

·      Identification of probable sources of landscape and visual impacts resulting from the project including noise mitigation measures (NMM) and their “Magnitude”;

·      Assessment of the resulting Impact Significance Threshold of landscape and visual impacts;

·      Identification of landscape and visual mitigation measures; and

·      Final assessment of the significance of residual impacts. 

Landscape Impact Assessment

7.3.2      Landscape and visual impacts have been assessed separately for the construction and operation phases.

7.3.3      The assessment of landscape impacts has involved the following procedures:-

(a)           Identification of the baseline landscape resources and landscape character found within the assessment area – this is achieved by a combination of desktop studies and site surveys.  Landscape elements that are in consideration include:-

·      Local topography;

·      Woodland extent and type;

·      Other vegetation types;

·      Built form;

·      Patterns of settlement;

·      Land use;

·      Scenic spots;

·      Details of local materials, styles, streetscapes, etc.;

·      Prominent watercourses; and

·      Cultural and religious identity.

(b)           Assessment of the degree of sensitivity of the landscape resources – each LR and LCA is rated at a different level of sensitivity, (low, medium or high).  The sensitivity depends on the following issues: 

·      Condition, quality and maturity of the LRs / LCAs;

·      Importance and scarcity of special landscape elements (scarcity being of either local, regional, national or global importance);

·      Ability of the LRs / LCAs to accommodate change; and

·      Statutory or regulatory requirements relating to the LRs/ LCAs.

(c)           The sensitivity of each landscape feature and character area is classified as follows:-

High:

Important landscape or landscape resource of particularly distinctive character or high importance, sensitive to relatively small changes.

Medium:

Landscape or landscape resource of moderately valued landscape characteristics reasonably tolerant to change.

Low:

Landscape or landscape resource, the nature of which is largely tolerant to change.

(d)          Identification of potential sources of landscape impacts – these are the various elements of the construction works and operational procedures that will generate landscape impacts.

(e)           Identification of the magnitude of landscape impacts – the magnitude of impacts depends on a number of factors as follows:-

·      Scale of the carriageway structures and associated facilities;

·      Compatibility of the structures with the surrounding environment;

·      Duration of impacts (temporary or permanent) under construction and during operation phases; and,

·      Reversibility of change.

Large:

The landscape or landscape resource will suffer from a major change.

Intermediate:

The landscape or landscape resource will suffer from a moderate change.

Small:

The landscape or landscape resource will suffer from slight or barely perceptible changes.

Negligible:

The landscape or landscape resource will suffer from no discernible change.

(f)            Identification of potential landscape mitigation measures – these may take the form of the followings measures:-

·      Adopting alternative design or revisions to the basic engineering design to prevent or minimize negative impacts;

·      Remedial measures include colour or textural treatment of the carriageway; and

·      Compensatory measures such as implementation of landscape design measures to compensate for unavoidable negative impacts and to attempt to generate potentially positive long term impacts.

(g)           Prediction of the significance of landscape impacts before and after the implementation of the mitigation measures – the significant thresholds are defined as follows:-

Substantial:

Adverse / beneficial impact where the proposal will cause significant deterioration or improvement in existing landscape quality.

Moderate:

Adverse / beneficial impact where the proposal will cause a noticeable deterioration or improvement in existing landscape quality.

Slight:

Adverse / beneficial impact where the proposal will cause a barely perceptible deterioration or improvement in existing landscape quality.

Insubstantial:

No discernible change in the existing landscape quality.

(h)           Prediction of Significance Threshold – the analysis of the landscape and visual impacts during construction and operation are presented in the following form of matrix as illustrated in Table 7-1 to ascertain the Significance Threshold.  The impacts may be beneficial or adverse.

Table 7-1     Significance Thresholds

Magnitude of Change

Sensitivity

 

Low

Medium

High

Large

Moderate Impact

Moderate / Substantial Impact

Substantial Impact

Intermediate

Slight / Moderate Impact

Moderate Impact

Moderate / Substantial Impact

Small

Slight Impact

Slight / Moderate Impact

Moderate Impact

Negligible

Insubstantial Impact

Insubstantial Impact

Insubstantial Impact

(i)             The significances of landscape impacts before and after mitigation are recorded – this comparison helps to illustrate the benefits of the mitigation measures. This is ranked as substantial, moderate, slight or insubstantial. The impacts can be beneficial or adverse.

Substantial:

Adverse / beneficial impact where the proposal will cause significant deterioration or improvement in existing landscape/visual quality

Moderate:

Adverse / beneficial impact where the proposal will cause a noticeable deterioration or improvement in existing landscape/visual quality

Slight:

Adverse / beneficial impact where the proposal will cause a barely perceptible deterioration or improvement in existing landscape/visual quality

Insubstantial:

No discernible change in the existing landscape/visual quality


Tree Survey Methodology

7.3.4      In accordance with Environment, Transport and Works Bureau Technical Circular (Works) No. 10/2013, all existing trees whose trunk diameters measure 95mm or more at a height of 1.3m above ground level were identified. Every tree surveyed individually is recorded with the following information:

·      Species

·      Height

·      Crown spread

·      Trunk diameter

·      Tree form amenity value

·      Health condition

·      Survival rate after transplanting

·      Special features

Visual Impact Assessment

7.3.5      The baseline survey of all views towards the proposed new carriageway structures and associated facilities is undertaken by identifying:

·      The visual envelope (VE) and zone of visual influence (ZVI) may contain areas which fall wholly, partially within views, or non-visible from the proposed development.  Indirect effects such as offsite construction activities were also considered; and

·      The visual sensitive receivers (VSRs) within the visual envelope whose views will be affected by the proposed development.  For the purpose of this study, receivers are grouped into the following categories:

Residential:

The most sensitive of receivers due to the high potential of intrusion on the visual amenity and the quality of life.

Occupational:

Less sensitive than above due to visual amenity considered less important within the work environment.

Leisure:

Including all areas apart from the above, e.g. public parks, recreation grounds, footpaths, etc.  Sensitivity of this group depends on the transitory nature of the receiver, e.g. sitting in a park.  Also considered is the degree of view or glimpsed views. 

Transportation:

Those people who will view the NMM’s from vehicles or while walking along the road.

7.3.6      Same as the landscape impact assessment, each of the VSRs is rated in different magnitude in the categories of sensitivity to visual intrusion (low, medium or high), magnitude of change (negligible, small, intermediate or large), and significance threshold before and after mitigation (substantial, moderate, slight or insubstantial).

 

7.3.7      The sensitivity of each group is also influenced by its location and direction of view relative to the scheme. Typical viewpoints from each of the visually sensitive groups are identified and their views described. 

7.3.8      The magnitude of changes of each VSR is affected by the following factors:

(a)           Scale of the proposed road works and associated facilities;

(b)          Compatibility of the project with the surrounding landscape forming the view;

(c)           Extent of visibility (level of potential blockage of the view);

(d)          Viewing distance;

(e)           Duration of impacts under construction and operational phases;

(f)           Reversibility of change; and

(g)          Night glare effect.

7.3.9      The degree of visual impact is rated in a similar fashion to the landscape impacts. Impacts can be beneficial or adverse.

Review of Planning and Development Control Framework

7.3.10    The review of the relevant statutory plan has been undertaken.  The planned uses shown in plans and existing conditions on site within the study area would be taken as the sensitive receivers. The assessment focuses on the areas directly affected by the proposed works. The study review covers the following information.

·      Land use zonings;

·      Approximate area of the land use zones to be affected by the project;

·      Design and conservation intention; and

·      Future outlook of the area.

Mitigation Measures

7.3.11     The identification of landscape and visual impacts assists in the recognitions of the sources of impacts. Mitigation measures should focus on the sources of impacts if possible, such as designing the proposed carriageway structures and associated facilities to blend in with the surrounding environment.

              Mitigation measures may be considered under two categories:

(a)           Primary mitigation measures that intrinsically comprise the identification of the location of the proposed carriageway and the design of supporting facilities through an iterative process. This form of mitigation is generally the most effective; and

(b)          Secondary mitigation measures designed to specifically address the remaining (residual) adverse effects of the proposed works.

7.4                   Scope and Content of the Study

7.4.1      The scope of the LVIA study shall cover the proposed road widening and associated works.  The LVIA study shall address the potential landscape and visual impacts during the construction and operation of the project.  

7.4.2      The assessment shall follow the criteria and guidelines for evaluating and assessing landscape and visual impacts as stated in Annexes 10 and 18 of the TM, and the EIAO Guideline Note No. 8/2010 “Preparation of Landscape and Visual Impact Assessment under the EIAO”. 

7.4.3      The study area for the landscape impact assessment shall include areas within a distance of 500 metres from the site boundary of the Project while the study area for the visual impact assessment shall be defined by the visual envelop of the project.  

7.4.4      The layout plan for LVIA is shown in Figure 7.1.

7.5                   Review of Planning and Development Control Framework

7.5.1      A review of the existing and planned development framework for the proposed works and for the surroundings is undertaken. The review of OZP includes a review of the plans, Notes and Explanatory Statements.

7.5.2      The project boundary outlined on the extracted Outline Zoning Plan (OZP) No. S/KC/28 is shown as below.

             

 

7.5.3      It is found that the project boundary falls mainly within area shown as “Road” and partly within area zoned “Industrial” (“I”), “Other Specified Uses” (“OU”) annotated “Container Related Uses”, “Residential (Group A)”.  In accordance with the correspondence of Planning Department in Jan 2014, it is stated in the Notes of the OZP that the road works implemented by Government department is always permitted and no planning permission is required from the Town Planning Board. No existing and planned industrial or residential developments will be affected by the project. The proposed permanent works only encroach onto the area “Road” and “OU”. Part of the flyover is in form of the elevated structure. The existing condition reveals that the affected “OU” areas are the planter, Public Works Laboratory and public carpark. Numerous highways structures and truck roads including Tsuen Wan Road, Kwai Chung Road, Tsing Kwai Highway, Container Port Road South and MTR viaduct – Tsuen Wan Line are surrounding the proposed flyover. Before the commencement of the construction, it is anticipated that the laboratory will be terminated; while a small portion of public carpark will be temporarily occupied as works area and permanently occupied by the proposed piers. The planter under the proposed flyover will be affected during the construction. Mitigation measures are discussed under this chapter.

7.6                   Baseline Study

Identification

7.6.1      This baseline study identifies and describes the landscape resources and landscape character areas and the visual amenity within the assessment area that will be affected during the construction and operation phases of the Project.

Landscape Resources

7.6.2      Landscape resources (LRs) identified within the assessment area includes roadside planting areas with existing trees, public open spaces, and recreational grounds. The landscape resources that will be potentially affected during the construction and operation phase are described below:

(a)           LR1 – Tree Planting along Tsuen Wan Road

(b)          LR2 – Tree Planting at Kwai Chung Road Interchange Area

(c)           LR3 – Kwai Chung Park

(d)          LR4 – Planting at foothills of Lai King Hill

(e)           LR5 – Lai King Sports Centre

(f)           LR6 – Kwai Shun Street Playground

(g)          LR7 – Kwai Chung Sports Ground

(h)          LR8 – Landscaped Area in Kwai Fong Core Area

(i)            LR9 – Kwai Yi Road Playground

(j)            LR10 – Lai King Hill Road Playground

(k)           LR11 – Landscape at Residential

(l)            LR12 – Landscape at School, Clinic, other Public Buildings

(m)        LR13 – Man-made Slope

(n)          LR14 – Roadside Planting Inside Container Terminal

(o)          LR15 – Planting at Highland Park

(p)          LR16 – Planting at DSD Kwai Chung Industrial Wastewater Pumping Station

7.6.3      The identified landscape resources in each group are discussed in details below and presented in Figure 7.2, whereas photos of the key landscape resources are shown on Figure 7.5.

(a)            LR1 – Tree Planting along Tsuen Wan Road

Existing trees found along the embankment between Tsuen Wan Road and the factory buildings in Kwai Chung industrial areas are mainly established Casuarina equisetifolia, Acacia confusa, Bombax malabarium, Koelreuteria bipinnata, and Macaranga tanarius. Other tree species such as Roystonea regia are found on the planting islands at road junctions at Kwai Tsing Interchange. These trees are of typical urban landscaping features in Hong Kong and have medium amenity value.  The sensitivity is medium.

(b)          LR2 –Tree Planting at Kwai Chung Road Interchange Area

The trees are mainly located in planting areas underneath the interchange viaducts with some of the tree crowns fetching a height more than 6m above ground and protruding in between the driving lane of the flyovers. These trees are mostly Ficus benjamina, Ficus microcarpa, Spathodea campanulata, Bauhinia purpurea, and Melaleuca leucadendendron. Some smaller tree species such as Bauhinia purpurea, Bauhinia blakeana, Plumeria ruba, and palm species like Caryota ochlandra and Livistona chinensis are scattered in groups in various planters in the area. These trees located underneath or adjacent to the proposed road works are typical urban landscaping features in Hong Kong. The sensitivity is medium.

(c)           LR3 –Kwai Chung Park

The Park, originally a restored landfill site, is a heavily wooded area with mature trees such as Acacia confusa, Eucalyptus urophylla, Ficus microcarpa, and Albizia lebbeck framing the western alignment of the Tsuen Wan Road.  Although the park is now closed to the public, people still use the connecting footbridges to travel between different factory clusters. The massive tree coverage is a distinct landscape resource in the bustling city landscape of Kwai Chung area. The sensitivity is high.

(d)          LR4 –Planting at Foothills of Lai King Hill

This area of heavily vegetated hill slopes forms a green backdrop to the eastern Kwai Chung District.  The vegetation of the lower portion of the hill is mainly semi-indigenous woodland with Casuarina equisetifolia, Acacia confusa, Bombax malabarium, Koelreuteria bipinnata, Macaranga tanarius, Ficus microcarpa, and Bauhinia blakeana while vegetations on higher elevations are natural woodland due to the topography. The lush tree covered hills is an important landscape resource in the area and sensitivity is high.

(e)           LR5 – Lai King Sports Centre

This is a recreational facility consists of indoor sports facilities, a football field and associated landscape area. There are tree planting at the entrance area and at the sitting out area towards the northern end of the facility. The trees are common species like Casuarina equisetifolia, Delonix regia, Magnolia alba and Terminalia mantaly. The trees are common species with medium amenity value. The sensitivity is medium.

(f)            LR6 – Kwai Shun Street Playground

A tree lined small local open space which provides both active and passive recreation facilities in the area.  The sitting out areas are frequently visited by the workers in nearby industrial buildings but the two skating rinks are seldomly used because of their relative obscure locations which are underneath the Tsuen Wan Road flyover. The trees are common species with medium amenity value such as Hibuscus variegate, Hibiscus tiliaceus, Koelreuteria bipinnata and Lagerstroemia spiciosa. The sensitivity is medium.

(g)          LR7 – Kwai Chung Sports Ground

A major sports ground facilities in Kwai Chung area which not only do large sports events but becomes a popular jogging venue for local residents in the evenings.  The sports ground is lined with trees on the peripheral with species such as Juniperus chinensis, while the interior are planted with Casuarina equisetifolia, Bauhinia blakeana and Chrysalidocarpus lutescens. The quality of the landscape is high and an important recreational resource in urban area. The sensitivity is high.

(h)          LR8 – Landscaped Area in Kwai Fong Core Area

This area is primarily the traffic hub of Kwai Fong which includes the central planting area with the landmark clock tower in the centre, the massive tree planting at the Kwai Tsing Theatre and ornamental planting at the roundabout area.  The tree planting at Kwai Tsing Theatre are especially important since it created an effective green barrier to shield off the industrial buildings beyond. Trees are common species like Archontophoenix alexandrae, Ficus Benjamina, Ficus microcarpa, Lagerstroemia spiciosa, Terminalia catappa, Terminalia mantaly and Roystonia regia. The amenity value of the landscape is high and sensitivity is high.

(i)            LR9 – Kwai Yi Road Playground

A small local open space with tree lined sitting area and basketball courts which provides both active and passive recreation for the district.  The trees are common species like Aleurites moluccana, Callistemon viminalis, Delonix regia, Peltophorum petrocarpum and Plumeria rubra. The quality of the landscape is medium and sensitivity is medium.

(j)            LR10 –Lai King Hill Road Playground

A local open space provides both active and passives recreation facilities for the residents in Lai King Area.  Trees are common species like Aleurites moluccana, Bauhinia variegate, Ficus virens, Eucalyptus citriodora, Livistona chinensis and Melaleuca leucadendron.  The quality of landscape is medium and sensitivity is medium.

(k)          LR11 – Landscape at Residential

These are mainly amenity shrubs and trees planting within the Lai King Estates, Cho Yiu Chuen and Yin Lai Court.  Screen planting are also found in areas like parking lots and roadside planting.  Trees are common species like Albizia lebbeck, Bauhinia variegate, Bombax ceiba, Delonix regia, Ficus microcarpa.  The amenity value of the landscape is medium and sensivity is medium.

(l)            LR12 – Landscape at School, Clinic, other Public Buildings

This LR represent those landscape areas located at public institutions and schools scattered around lower Lai King area.  The landscape treatment is mainly trees with shrubs planting that are well maintained.  These plantings serve various functions such as screening and shade providing.  The amenity value of the landscape is medium and sensitivity is medium.

(m)        LR13 –Man-made Slope Area

This LR represents a dominant type of man-made landform as a result of site formation work for vehicular roads and human settlements for Kai King Area.  Depending on the topograghy of the slope, varying slope treatments such as exposed rock surface, shotcreted, hydroseeding and regenerated woodland.  The vegetation are mainly semi-indigenous woodland type with species like Casuarina equisetifolia, Acacia confusa, Bombax malabarium, Koelreuteria bipinnata, Macaranga tanarius, Ficus microcarpa, and Bauhinia blakeana.  The amenity value of the landscape is medium and sensitivity is medium.

(n)          LR14 –Roadside Planting inside Container Terminal

These are mainly roadside tree plantings along the Container Port Road inside the container terminal.  Tree species are mainly Ficus benjamina which provides shade and screening along the Container Port Road.  These trees are typical urban landscaping features in Hong Kong. The sensitivity is medium.

(o)          LR15 – Planting at Highland Park

This LR is typical landscape treatment in most residential development on Hong Kong.  The trees at this locations are mainly Ficus benjamina, Ficus microcarpa, Bauhinia species, Schefflera heptaphylla and Archontophoenix alexandrae.  The amenity of this landscape is medium and  sensitivity is medium.

(p)          LR16 – Planting at DSD Kwai Chung Industrial Wastewater Pumping Station

The trees in this pumping station effectively screen the facility from views on street level.  The tree species are mainly Senna siamea and Ficus microcarpa.  The amenity value of the landscape is medium and sensitivity is medium.

 

Impacts on Existing Trees

Existing Trees

7.6.4      A survey of existing trees within the study area identified a total number of 85 trees within the tree survey boundary. Typical roadside tree planting is common with a majority of the trees having reached a mature stature. The trees are of various sizes and species.

7.6.5      None of these are Registered Old and Valuable Trees.  There are no rare and endangered species but only common species.

Recommended Treatment of Existing Trees

7.6.6      A total number of 85 trees were identified within or in close proximity to the proposed road works and are likely to be affected by the proposed works.

7.6.7      Compensatory planting / replanting according to ETWB TCW No. 10/2013 App. A: I (v)(b) states that the compensatory planting ratio shall not be less than 1:1 in terms of quantity of felled trees including dead trees and trees of undesirable species. Tree findings and recommendation of their treatment are summarized in the following table. The tree survey layout plan under the preliminary stage of design and conceptual Landscape Master Plan are shown in Figures 7.8A and 7.8B. Due to the limited available space for the construction of the new carriageway and associated footbridges, 59 trees will be felled and 26 trees will be transplanted to locations within Kwai Chung district under separate arrangement with LCSD.  Attempts has been made to propose transplanting trees back to site but failed due to site constraints, spatial requirements for healthy tree growth, and future maintenance department requirement.  Detailed tree removal application will be submitted in accordance with ETWB TCW No. 10/2013.

Table 7-2     Summaries of the Tree Survey Recommendations

Tree Recommendation Status - Existing Trees within Proposed Road Widening Works Area

Total

Recommended for Retaining 

0

Recommended for Transplanting

26

Recommended for Felling

59

Total Trees Surveyed on Site

85

Landscape Character Areas

7.6.8      The landscape characters of the assessment area situated within and adjacent to the Tsuen Wan Road and Kwai Chung Road Interchange area are strongly influenced by the topography and urban development context. Eight major landscape character areas (LCAs) have been identified within the area. The following section describes those areas and their degrees of sensitivity toward the proposed changes. Landscape character plans are presented in Figure 7.3 to read in conjunction with the text. Photographic records of LCAs are provided in Figure 7.6.

7.6.9      The eight major LCAs identified within the assessment area are described as below:-

(a)           LCA1 – Mixed Residential and Commercial Surrounding Kwai Fong MTR Station

The area of high-rise residential buildings, office buildings and MTR station is the hub in Kwai Chung area. The area is characterised by a high sense of enclosure, with predominantly man-made features with busy pedestrian and vehicle traffic.  The area is visited by high numbers of daily commuters and has high ability to accommodate change. The sensitivity is low.

(b)          LCA2 – Residential at Higher Level of Lai King Hill

The residential area at higher level of Lai King is represented by the PSPS development the Highland Park and public housing Lai Yiu Estate.  The area is buffered by a natural vegetated slope separating the lower level of Lai King Hill residential area below. This resulted in a relatively secluded residential area overlooking the bustling city activities below. The sensitivity is medium.

(c)           LCA3 – Residential at Lower Level of Lai King Hill

This landscape character area is represented by the concentration of public housing estates, such as Lai King Estate and Cho Yiu Chuen; HOS housing such as Yin Lai Court and Yuet Lai Court; schools and MTR station. The area also includes a Polyclinic & Special Educational Services and is of Polyclinic & Special Educational Services. Vegetation is limited in the area and the type of landscape is common public housing setting with high ability to accommodate change. The sensitivity is low.

(d)          LCA4 – Industrial & Open Storage Area along Tsuen Wan Road

Centred around the Kwai Tsing Interchange, open storage areas and industrial buildings of mixed ages form dense clusters of blocks with narrow streets serving the interior.  This LCA has low sensitivity because of its industrial character.

(e)           LCA5 – Kwai Chung Sports Ground

Located across Kwai Fong Road opposite to LCA1, the Kwai Chung Sports Ground is the major outdoor sports facilities in the heart of the area. The facility is well-served with pedestrian linkages and sensitivity is high.

(f)           LCA6 – Kwai Chung Road Interchange

This area is characterised by the major highways with separated carriageways, MTR viaducts, footbridges, and associated uses.  Between the roads are profile barriers and occasionally planting areas with trees fetch up to 10m high. This type of LCA is common to Hong Kong and is less sensitive to development. The sensitivity is low.

(g)          LCA7 – Kwai Chung Container Terminal

Built in the late 60’s, the container terminal continually drives the development of Kwai Chung area to a busy and vibrant suburb of Hong Kong. The area is characterised by container loading cranes, stacks of containers, go downs and lifting vehicles. This type of LCA is less sensitive to development and sensitivity is low.

(h)          LCA8 – Kwai Chung Park

The Park is characterised by heavily vegetated small mount with mature trees which provides a distinctly contrasting setting to the industrial buildings and container terminal in the area. The landscape is considered as high quality and of regional significance. The sensitivity is high.

Potential Sources of Landscape Impacts

7.6.10    The potential sources of landscape impact during construction would include items such as site clearance including  removal of existing trees for construction, setting up site hoardings and offices, establishing storage area, constructing future carriageway, noise barriers and associated footbridges structural works. Potential impacts would result from the nature of the items either temporary or permanent works during construction.

7.6.11     The potential sources of landscape impact during operation will include the permanent loss of trees, completed new carriageway, footbridges, noise barriers, new shrubs planting and streetscape enhancement.


Table 7-3     Potential Sources of Landscape Impacts during Construction Phase

LIC1 – Loss of Existing Vegetations

Removal of existing trees and shrubs for the new viaduct, footbridge and road widening works

LIC2 – Site Hoarding/Offices

Establishment of site offices and erection of hoardings

LIC3 – Dismantlement of Existing Footbridge

Dismantlement of the existing footbridge for the down ramp of the new carriageway

LIC4 – Road Widening Works

Widening section of Tsuen Wan Road

LIC5 – Construction of Noise Barriers

Construction of noise barriers along the new viaduct

LIC6 – Construction of New Footbridge

Re-provision of the footbridge north close to the Lai King Catholic Secondary School

 

Table 7-4     Potential Sources of Landscape Impacts during Operation Phase

LIO1 – Loss of Existing Trees

Permanent loss of existing trees

LIO2 –New Viaduct

Permanent pre-stressed concrete box girder viaduct

LIO3 –New Footbridge

Permanent footbridge structure

LIO4 –New Shrub

New shrub planting in the area

LIO 5 Streetscape Enhancement

Landscape elements such as pedestrian walkway paving enhancement, street furniture and lighting

 

 

Magnitude of Landscape Impacts

7.6.12    The magnitude of unmitigated landscape impact associated with the construction phase and operational phases of the Project are assessed and described below:


Table 7-5  Magnitude of Landscape Impacts during Construction and Operation Phases

ID No.

Landscape Resources/Landscape Character Areas

Source of Impact

Description of Impacts

Magnitude of Change (large / Intermediate / Small / Negligible)

Construction

Operation

LR1

Tree Planting along Tsuen Wan Road

Nil

Nil

Negligible

Negligible

LR2

Tree Planting at Kwai Chung Road Interchange Area

Dismantlement of existing footbridge, construction of the new carriageway and footbridges and associate structures and operation of the new carriageway footbridges and associate structures during operation phase

During construction phase, tree planting within the road interchange area will be removed.  Approximately 85 nos. of trees are affected with 59 nos. proposed to be felled, 26 nos. proposed to be transplanted to new locations within Kwai Chung area under separate arrangement with LCSD.   Tree species include Ficus benjamina, Ficus microcarpa, Spathodea campanulata, Bauhinia purpurea, and Melaleuca leucadendendron, Bauhinia purpurea, Bauhinia blakeana, Plumeria ruba.

Large

Large

LR3

Kwai Chung Park

Nil

Nil

Negligible

Negligible

LR4

Planting at foothills of Lai King Hill

Nil

Nil

Negligible

Negligible

LR5

Lai King Sports Centre

Nil

Nil

Negligible

Negligible

LR6

Kwai Shun Street Playground

Nil

Nil

Negligible

Negligible

LR7

Kwai Chung Sports Ground

Nil

Nil

Negligible

Negligible

LR8

Landscaped Area in Kwai Fong Core Area

Nil

Nil

Negligible

Negligible

LR9

Kwai Yi Road Playground

Nil

Nil

Negligible

Negligible

LR10

Lai King Hill Road Playground

Nil

Nil

Negligible

Negligible

LR11

Landscape at Residential

Nil

Nil

Negligible

Negligible

LR12

Landscape at School, Clinic, other Public Buildings

Nil

Nil

Negligible

Negligible

LR13

Man-made Slope

Nil

Nil

Negligible

Negligible

LR14

Roadside Planting Inside Container Terminal

Nil

Nil

Negligible

Negligible

LR15

Planting at Highland Park

Nil

Nil

Negligible

Negligible

LR16

Planting at DSD Kwai Chung Industrial Wastewater Pumping Station

Nil

Nil

Negligible

Negligible

LCA1

Mixed Residential and Commercial Surrounding Kwai Fong MTR Station

Nil

Nil

Negligible

Negligible

LCA2

Residential at Higher Level of Lai King Hill

Nil

Nil

Negligible

Negligible

LCA3

Residential at Lower Level of Lai King Hill

Dismantlement of existing footbridge, construction of the new carriageway and footbridges and associate structures and operation of the new carriageway footbridges and associate structures during operation phase

During construction phase, there would be some change of landscape character due to the proposed demolition, construction and associated temporary works.

 

During operation phase, the new a carriageway and footbridges will be integrated into the existing Kwai Chung Road system.

Small

Negligible

LCA4

Industrial & Open Storage Area along Tsuen Wan Road

Nil

Nil

Negligible

Negligible

LCA5

Kwai Chung Sports Ground

Nil

Nil

Negligible

Negligible

LCA6

Kwai Chung Road Transportation Corridor

Dismantlement of existing footbridge, construction of the new carriageway and footbridges and associate structures and operation of the new carriageway footbridges and associate structures during operation phase

During construction phase, the will be changes in landscape character due to proposed demolition, construction and associated construction works.  The extend of works is localised at the interchange area which is the heart of the Kwai Chung Road system.

 

During operation phase, impact will be same as the construction period.   New section of carriageway, new footbridges and associated structures will become part of the Kwai Chung Road system.

Intermediate

Intermediate

LCA7

Kwai Chung Container Terminal

Nil

Nil

Negligible

Negligible

LCA8

Kwai Chung Park

Nil

Nil

Negligible

Negligible

 

7.6.13    The magnitude of change, before implementation of mitigation measures, in the construction and operation phases are assessed and presented in Table 7-5.  All impacts are adverse unless otherwise stated.

7.6.14    LR2 – Tree Planting at Kwai Chung Road Interchange Area will be removed for the new carriageway and associated footbridges construction work.  The tree planting area will be occupied by the flyover and bridge structure leaving insufficient room for future tree planting.  The magnitude of change is expected to be large.

7.6.15    LCA3 – Residential at Lower Level of Lai King Hill will be affected by the change of landscape character due to the proposed demolition, construction and associated temporary works.  The magnitude of change is considered as small.  The resultant unmitigated impact is considered as moderate.  There will not be any impact on this LCA during operation phase when the construction works are completed.

7.6.16    LCA6 – Kwai Chung Road Transportation Corridor will have changes in landscape character due to proposed demolition, construction and associated construction works.  The extent of works is localised at the interchange area which is the heart of the Kwai Chung Road and will become an integral part of the road system when completed.  The magnitude of change is intermediate. 

7.6.17    There would not be any discernible landscape impact on other LRs and LCAs and their magnitude of impact is negligible.


Visually Sensitive Receivers (VSRs)

7.6.18    This baseline study identifies and describes the visual zones and visual sensitive receivers (VSRs) that will be affected during the construction and operation phases of the Project.

7.6.19    The visual envelope (VE) for the proposed road work is quite open along at the Kwai Chung Road Interchange area.  It is however, the VE is confined by a combination of human infrastructure such as buildings, flyover systems and natural elements such as topography and nearby hills and vegetation. In general, viewing distances of the proposed work vary from as close as 100m for those VEs at Lai King Estate area to 500m for VEs at Kwai Fong. Within this VE, extension of the existing views is determined by factors such as the presence of intervening visual obstacles such as building structures, earth berms, and vegetations.

7.6.20    The visual amenity observed by VSRs inside ZVI is characterised by the views framed by the surrounding buildings, elevated roads along the Tsuen Wan Road, Kwai Chung Road Interchange area and natural terrain of the Lai King Hill, which are quite restricted in some sections. The proposed road widening work is proposed at the merging point of Tsuen Wan Road and Kwai Chung Road which is very visible from the local residents, vehicular travellers, school goers, visitors and workers in the area. Considering the existence of a major flyover interchange system in the area, the degrees of sensitivity of these receivers are generally from low to medium.

7.6.21    VSRs identified within the ZVI are listed below and their existing visual context is illustrated in Figure 7.4; photographic record of key VSRs are listed in Figures 7.7A to 7.7C.

(a)           VSR – Residential (R)

R1 – Residents at Kwai Chung Plaza

R2 – Residents at New Kwai Fong Gardens   

R3 – Residents at Kwai Fong Terrace   

R4 – Residents at Lai Yiu Estate   

R5 – Residents at Lai King Estate North

R5A – Residents at Lai King Estate South 

R6 – Residents at Yin Lai Court

R7 – Residents at Highland Park

R8 – Residents at Yuet Lai Court

R9 – Residents at Cho Yiu Chuen

(b)          VSR – Occupational (O)

O1 – Workers at Metroplaza

O2 – Workers at Kwai Chung Industrial Area

O3 – Workers at Kwai Fong Ancillary Building

O4 – Staff and Visitors at Polyclinic & Special Educational Services

O5 – Staff and Students at Lai King Catholic Secondary School 

O6 – Workers at Ever Gain Plaza

O7 – Staff and Workers at Container Terminals

O8 – Staff and Students at Lingnan Dr. Chung Wing Kwong Memorial Secondary School

O9 – Workers at Lai King MTR Station

O10 – Staff at Lai King Assessment Centre

O11 – Staff and Visitors at OUHK – CITA Lai King Learning Centre

O12 – Staff and Visitors to Lai King Community Hall

O13 – Staff and Students at Asbury Methodist Primary School

(c)           VSR – Leisure (L)

L1 – Visitors to Kwai Shun Street Playground

L2 – Visitors to Kwai Yip Road Playground

L3 – Visitors to Lai King Sports Centre

L4 – Visitors to Kwai Chung Park

L5 – Visitors to Lai King Hill Road Playground

(d)          VSR – Transportation (T)

T1 – Open Storage Area Car Park Users

T2 – Pedestrians travelling on Street Level under Kwai Chung Road Interchange Area

T3 – Commuters on Tsuen Wan Road/Kwai Chung Road

T4 – Commuters at Lai King Bus Terminus

T5 – Commuters on MTR

T6 – Travellers to Kwai Fong Core Area

7.6.22    The degrees of sensitivity of selected VSRs within the ZVI to accommodate changes are demonstrated in Table 7-8. The magnitude of changes related to the VSRs before mitigation are demonstrated in Table 7-9.

Potential Sources of Visual Impacts

7.6.23    The potential sources of visual impacts during construction will include items such as setting up of site hoardings, constructing site office, materials and machinery storage area, site clearance including removal of vegetations for construction. All impacts are reversible with careful design, planning and coordination during the design phase. The impacts of these items can further be reduced by choices of colour and material for the hoardings, site offices design and lighting during night time. The removal of vegetation will cause a downgrade of visual quality in the area. Details of mitigation measures during construction phase are presented in Table 7-10.

7.6.24    The potential sources of visual impacts during operation will include the completed flyover systems, footbridges, noise barriers, and the loss of existing trees at the project site. The appearances of flyovers, footbridges, noise barrier structures and other associated structures can be dealt with during the design phase of the project with considerations of choices of materials and colour of the structures. It is also important to integrate all the bridge structures, noise barriers and associate structures with the existing flyover system so that they form an integral part of the mega-structure once completed. The loss of trees due to the construction work can be dealt with by a holistic planting scheme that considers using shrubs for planters at grade. Details of mitigation measures during operation phase are presented in Table 7-11.

Table 7-6       Potential Sources of Visual Impacts during Construction Phase

VIC1 – Loss of Existing Vegetations

Removal of existing trees and shrubs for the new viaduct, footbridge and road widening works

VIC2 – Site Hoarding/Offices

Establishment of site offices and erection of hoardings

VIC3 – Dismantlement of Existing Footbridge

Dismantlement of the existing footbridge for the down ramp of the new carriageway

VIC4 – Road Widening Works

Widening section of Tsuen Wan Road

VIC5 – Construction of Noise Barriers

Construction of noise barriers along the new viaduct

VIC6 – Construction of New Footbridge

Re-provision of the footbridge north close to the Lai King Catholic Secondary School

 

Table 7-7       Potential Sources of Visual Impacts during Operation Phase

VIO1 – New Viaduct

Permanent pre-stressed concrete box girder viaduct

VIO2 – Noise Barrier Structure

Permanent noise barrier associated with the new viaduct

VIO3 – New Footbridge

Permanent footbridge structure

VIO4 – New Shrub Planting

New shrub planting

VIO5 – Streetscape Enhancement

Landscape elements such as pedestrian walkway paving enhancement, street furniture and lighting


Table 7-8      Visual Sensitive Receivers (VSRs) and their Sensitivity

Type

VSRs

Population of VSRs (Few/ Small/ Intermediate/ Large)

Quality of View

(Good/ Fair/ Poor)

Degree of Visibility

(Full / Partial / Glimpse/Shielded)

Availability and Amenity Alternative Views

Frequency of View

(Very Frequent / Frequent / Occasional / Rare / Nil)

Sensitivity (Low/ Medium/ High)

Residential

R1

Kwai Chung Plaza

Intermediate

Fair

Partial

Yes / alternative surrounding views

Occasional

Medium

R2

New Kwai Fong Gardens

Intermediate

Fair

Partial

Yes / alternative surrounding views

Occasional

Medium

R3

Kwai Fong Terrace

Intermediate

Fair

Partial

Yes / alternative surrounding views

Occasional

Medium

R4

Lai Yiu Estate

Large

Good

Full

Yes / Panoramic surrounding views

Rare

Medium

R5

Lai King Estate North

Large

Fair

Full

Yes / Panoramic surrounding views

Very Frequent

High

R5A

Lai King Estate South

Large

Fair

Partial

Yes / Panoramic surrounding views

Occasional

High

R6

Yin Lai Court

Intermediate

Fair

Partial

Yes / alternative surrounding view

Occasional

Medium

R7

Highland Park

Large

Good

Partial

Yes / Panoramic surrounding views

Frequent

Medium

R8

Residents at Yuet Lai Court

Intermediate

Good

Shielded

Yes / alternative surrounding views

Nil

Medium

R9

Residents at Cho Yiu Chuen

Large

Good

Shielded

Yes / alternative surrounding views

Nil

Medium

Occupational

O1

Metroplaza

Large

Good

Full

Yes / alternative surrounding views

Occasional

Low

O2

Kwai Chung Industrial Area

Large

Poor

Glimpse

Yes / Limited views in other directions

Rare

Low

O3

Kwai Fong Ancillary Building

Few

Good

Full

Yes / alternative surrounding views

Rare

Low

O4

Polyclinic & Special Educational Services

Intermediate

Good

Full

Yes / alternative surrounding views

Rare

Medium

O5

Lai King Catholic Secondary School

Intermediate

Fair

Full

Yes / alternative restricted surrounding views

Very Frequent

Medium

O6

Ever Gain Plaza

Large

Good

Full

Yes / alternative surrounding views

Frequent

Low

O7

Container Terminals

Large

Fair

Full

Yes / Panoramic surrounding views

Rare

Low

O8

Lingnan Dr. Chung Wing Kwong Memorial Secondary School

Intermediate

Fair

Partial

Yes / alternative surrounding views

Occasional

Medium

O9

Lai King MTR Station

Small

Poor

Glimpse

Yes / alternative surrounding views

Rare

Low

O10

Lai King Assessment Centre

Small

Fair

Partial

Yes / alternative surrounding views

Occasional

Low

O11

OUHK – CITA Lai King Learning Centre

Small

Fair

Shielded

Yes / limited surrounding views

Nil

Low

O12

Lai King Community Hall

Small

Fair

Shielded

Yes / limited surrounding views

Nil

Low

O13

Asbury Methodist Primary School

Intermediate

Fair

Shielded

Yes / limited surrounding views

Nil

Medium

Leisure

L1

Kwai Shun Street Playground

Small

Poor

Glimpse

Yes / alternative surrounding views

Occasional

Medium

L2

Visitors to Kwai Yip Road Playground

Small

Fair

Shielded

Yes / alternative surrounding views

Rare

Medium

L3

Visitors to Lai King Sports Centre

Medium

Fair

Glimpse

Yes / alternative surrounding views

Rare

Medium

L4

Visitors to Kwai Chung Park

Medium

Fair

Glimpse

Yes / alternative surrounding views

Frequent

Medium

L5

Visitors to Lai King Hill Road Playground

Small

Fair

Shielded

Yes / alternative surrounding views

Rare

Medium

Transportation

T1

Open Storage Area Car Park Users

Intermediate

Poor

Full

Yes / limited surrounding views

Frequent

Low

T2

Pedestrians travelling on Street Level under Kwai Chung Interchange Area

Small

Poor

Full

Yes / alternative surrounding views

Very Frequent

Low

T3

Commuters on Tsuen Wan Road/Kwai Chung Road

Large

Fair

Full

Yes / Panoramic surrounding views

Very Frequent

Low

T4

Commuters at Lai King Bus Terminus

Intermediate

Good

Full

Yes / Panoramic surrounding views

Occasional

Low

T5

Commuters on MTR

Large

Fair

Full

Yes / alternative surrounding views

Frequent

Low

T6

Travellers to Kwai Fong Core Area

Large

Fair

Glimpse

Yes / alternative surrounding views

Rare

Low

 

Table 7-9      Magnitude of Change on Visually Sensitive Receivers before Mitigation

Type

VSRs

Source of Impact

Distance to Source (m)

Compatibility with Surroundings (Good / Fair / Poor)

Scale of Development

(Small / Med / Large)

Duration of Impacts (Short / Med / Long)

Reversibility of Change

(Yes / No)

Potential Blockage of View (Full / Part / Nil)

Magnitude of Change

(Large / Intermediate / Small / Negligible)

Con

Op

Con

Op

Con

Op

Con

Op

Con

Op

Con

Op

Residential

R1

Kwai Chung Plaza

VIC1,2,4,5,6

VIO1,2,3

450+

Fair

Fair

Small

Small

Med

Long

Yes

Yes

Nil

Nil

Negligible

Negligible

R2

New Kwai Fong Gardens

VIC1,2,4,5,6

VIO1,2,3

450+

Fair

Fair

Small

Small

Med

Long

Yes

Yes

Nil

Nil

Negligible

Negligible

R3

Kwai Fong Terrace

VIC1,2,4,5,6

VIO1,2,3

300-400

Fair

Fair

Small

Small

Med

Long

Yes

Yes

Nil

Nil

Negligible

Negligible

R4

Lai Yiu Estate

VIC1,2,3,4,5,6

VIO1,2,3

400+

Fair

Fair

Small

Small

Med

Long

Yes

Yes

Nil

Nil

Negligible

Negligible

R5

Lai King Estate North

VIC1,2,3,4,5,6

VIO1,2,3,4,5

50+

Fair

Fair

Small

Small

Med

Long

Yes

Yes

Nil

Nil

Intermediate

Small

R5A

Lai King Estate South

VIC1,2,3,4,5

VIO1,2,3,4

250+

Fair

Fair

Small

Small

Med

Long

Yes

Yes

Nil

Nil

Small

Negligible