Yuen Long, Kam Tin, Ngau Tam Mei &
Tin Shui Wai Drainage Improvement
Stage 1, Phase 2B –
Kam Tin
Secondary
Drainage Channel KT13
Final Report
[382047/E/EIA/Issue 9]
May 2006
|
Report Authorized For Issue By: |
|
|
|
For and on Behalf of Black & Veatch Hong Kong Limited |
For
Black & Veatch Hong Kong Limited Drainage
Services Department
Room 1201-11,
418 Kwun tong Road 42/F,
CONTENTS
END OF TEXT
APPENDICES
Appendix B Evaluation of Possible Alignment Options for the Bypass Culvert
Appendix C Ecological Forms for Field Survey
Appendix E Floral Species and their Relative Abundance found within the Study Area
Appendix F Construction Noise Information and Calculations
Appendix G1 Results of Sediment and Water Quality Sampling in 2000
Appendix G2 Results of Sediment Sampling in 2005
Appendix H Test Pit Excavation Results and Section Drawings
Appendix I1 Auger Testing Results
Appendix I2 Historical Buildings and Structure Catalogue
Appendix J Mitigation Measures Implementation Schedule
LIST OF TABLES
Table 2.1 Evaluation
of Alignment Options for Section of Bypass Channel
Table 2.3 Summary of Continuous Public Involvement
Table 2.4 Summary of the Comments and Recommendations received during the Public Consultation
Table 3.1 Environmental Issues Addressed in this EIA Report
Table 4.1 Habitat Types and Areas within the Study Area
Table 4.2 Habitat Types and Areas within the Project Area
Table 4.3a Belt Transect Floral Survey Results (Upstream Section)
Table 4.3b Belt Transect Floral Survey Results (Mid Section)
Table 4.4 Faunal Surveys of KT13 - Summary of Methodologies
Table 4.6 Wetland Dependent Species Recorded in the Study Area
Table 4.7 Odonates Observed in the Study Area
Table 4.8 Butterfly Species Observed in the Study Area
Table 4.10 Number of Pairs of Breeding Egrets at Ho Pui during Summer 2000
Table 4.11 Number of Pairs of Breeding Egrets at Ma On Kong during Summer 2000
Table 4.12 Brood Size and Frequency at Ho Pui Egretry during June 2000
Table 4.13 Brood Size and Frequency at Ma On Kong Egretry during June 2000
Table 4.14 Number of Pairs of Breeding Egrets at Kam Tin during Summer 2000
Table 4.15 Summary of Brood Size in Hong Kong Egretries during 1999
Table 4.16 Number of Pairs of Breeding Egrets at Ho Pui 2000 – 2005
Table 4.17 Number of Pairs of Breeding Egrets at Ma On Kong 2000 – 2005
Table 4.18 Number of Pairs of Breeding Egrets at Kam Tin Shui Mei 2000 – 2005
Table 4.19 Number of Pairs of Breeding Egrets at Tung Shing Lei (Au Tau) 2000 – 2005
Table 4.20 Total Number of Pairs of Breeding Egrets in the Kam Tin Area 2000 – 2005
Table 4.21 Details of Distances Flown by Egrets at Ho Pui and Ma On Kong Egretries, Summer 2000
Table 4.22 Habitat Selection of Egrets at Ho Pui and Ma On Kong Egretries, Summer 2000
Table 4.23 Ecological Evaluation of Woodlands
Table 4.24 Ecological Evaluation of Shrublands
Table 4.25 Ecological Evaluation of Marsh
Table 4.26 Ecological Evaluation of Fishponds
Table 4.27 Ecological Evaluation of Stream (KT13)
Table 4.28 Ecological Evaluation of Low-lying Grasslands/ Fallow Land
Table 4.29 Ecological Evaluation of Hillside Grasslands
Table 4.30 Ecological Evaluation of Agricultural Lands
Table 4.31 Ecological Evaluation of Orchard/ Horticultural Land
Table 4.32 Ecological Evaluation of Urban and Industrial Area (UIA)/Bare Ground/ Works in Progress
Table 4.33 Ecological Evaluation of Drainage Channel
Table 4.34 Direct habitat loss arising from construction of the Secondary Drainage Channel KT13
Table 4.35 Tree and bamboo species to be used in compensatory planting area
Table
5.1 Technical
Memorandum on EIA Process Daytime Construction Noise Standards
Table
5.2 Details
of the Existing NSRs Close to KT13
Table 5.3 Predicted (Unmitigated) Construction Noise Levels
Table 5.4a Predicted (Mitigated) Construction Noise Levels for Site Clearance
Table 5.4b Predicted (Mitigated) Construction Noise Level for Excavation of Channel
Table 5.4c Predicted (Mitigated) Construction Noise Level for Formwork Construction
Table 5.4d Predicted (Mitigated) Construction Noise Level for Concreting Works
Table 5.5 Summary of Proposed Construction Noise Mitigation Measures
Table
6.1 Hong Kong Air Quality Objectives
(AQOs)
Table 6.2 Representative Air Sensitive Receivers (ASRs)
Table 6.3 Air Pollutants Concentrations at Yuen Long EPD Station (2003)
Table 7.1 Field Observations at Existing Streams to be Modified under Ma On Kong
Table 7.2a Summary of EPD Water Quality Data for Yuen Long Creek in 1998 to 2000
Table 7.2b Summary of EPD Water Quality Data for Yuen Long Creek in 2001 to 2003
Table 7.4 Summary of Impacts from Construction Activities
Table 7.5 Summary of Mitigation measures for Construction Impacts
Table 7.6 Summary of Mitigation Measures for Minimising Operational Impacts
Table 8.1b Method and Programme of the Disposal of Construction and Demolition Materials (m³)
Table 8.2 Construction Wastes Generated by the Proposed Works
Table 9.1 Summary of the Archaeological Findings in Each Unit
Table 9.3 Mitigation
Recommendations for the Cultural Heritage Resources in the Study Area
Table 10.2 Proposed Construction Phase Landscape Mitigation Measures
Table
10.3 Proposed
Operation Phase Landscape Mitigation Measures
Table
10.4 Significance
of Landscape Impacts in Construction and Operation Phases
Table
10.5 Significance
of Visual Impacts in Construction and Operation Phases
Table
11.1 Summary
of EM&A Requirements
Table
11.2 Framework
for Environmental Monitoring Plan
Table
11.3 Air
Quality Monitoring Stations
Table
11.4 Noise
Monitoring Stations
Table
11.5 Water
Quality Monitoring Stations
Table
11.6 Sediment
Quality Monitoring Stations
Table
11.7 Cultural
Heritage Resources Requiring Condition Survey during Construction Phase
Table
11.8 Ecological
Resources Requiring EM&A Under this Project
LIST
OF FIGURES
Figure 1.1 Locations of Drainage Improvement Works
Figure 2.1 KT13 and its Relation with Catchments in Northwest New Territories
Figure 2.2a Ma On Kong Channel KT13 Proposed Layout Plan (Sheet 1 of 2)
Figure 2.2b Ma On Kong Channel KT13 Proposed Layout Plan (Sheet 2 of 2)
Figure 2.3 Physical and Planning Constraints to the Possible Alignment of KT13
Figure 2.4 Typical Gabion Bank Construction for Trapezoidal Channel
Figure 4.1 Habitat Map for KT13
Figure 4.2 Sampling Locations and Significant Findings for Flora and Fauna Survey (KT13)
Figure 4.3 Locations of Ecological Sensitive Receivers
[Figure
4.4 – 4.12 can be found within the main text]
Figure 4.4 Number of Pairs of Egrets Breeding at Ho Pui during 1991-2000
Figure 4.5 Number of Pairs of Egrets Breeding at Ma On Kong during 1995-2000
Figure 4.7 Distance from Egretry and Number of Birds for Ho Pui and Ma On Kong, Summer 2000
Figure 4.8 Flight Direction and Distance Flown from the Egretry
Figure 4.9 Direction of Flight and Distance Traveled for Little Egret
Figure 4.10 Direction of Flight and Distance Traveled for Cattle Egret
Figure 4.11 Direction of Flight and Distance Traveled for Chinese Pond Heron (Ho Pui)
Figure 4.12 Direction of Flight and Distance Traveled for Chinese Pond Heron (Ma On Kong)
Figure 4.13 Proposed Mitigation Measures for Ecological Impact
Figure 5.1 Location
and Extent of Noise Study Area (300 m from Proposed Works)
Figure 5.2 Locations
of Representative Noise Sensitive Receivers
Figure 5.3 Locations
of Proposed Temporary Noise Barriers
Figure 6.1 Locations
of Representative Air Sensitive Receivers
Figure 6.2 Wind Rose for Shek Kong Station
Figure 7.2 Typical
Section of Sedimentation Area
Figure 7.3 Schematic
Design for Temporary Drainage Diversion
Figure 8.1 Sediment
Sampling Locations, Sediment Classification and Sediment Disposal Type for KT13
Figure 9.1 Map
of the Study Area (1:7000)
Figure 9.5 Map
of Unit 1 Showing Location of Auger Holes 1-27 and Test Pits 1 and 2
Figure 9.6 Map
of Unit 2 Showing Locations of Auger Holes 28-54 and Test Pits 3 and 4
Figure 9.7 Map
Showing the Auger Hole Tests and Test Pit 5 and 6 Locations in Unit 3
Figure 9.8 North
Section of Test Pit Number 5
Figure 9.9 North
Section of Test Pit Number 6
Figure 9.10 Map of Ho Pui Showing the Location of Each of the Historical Buildings and Structures
Figure 9.11 Map of Tai
Kek Showing the Location of Each of the Historical Buildings and Structures
Figure 9.14 Map of the
Area East of Ma On Kong Showing the Location of the Shrine Located there
Figure 9.15a Location of All
Cultural Heritage Features within the Study Area
Figure 9.15b Location of All
Cultural Heritage Features within the Study Area
D-001 Ma
On Kong Channel KT13 - Planning and Development Control Framework Review
LR-001 Ma
On Kong Channel KT13 - Landscape Resource Baseline
PR-001 Ma
On Kong Channel KT13 - Landscape Resource Photos (Sheet 1 of 2)
PR-002 Ma
On Kong Channel KT13 - Landscape Resource Photos (Sheet 2 of 2)
LRI-001 Ma
On Kong Channel KT13 - Residue Impact on Landscape Resource - Construction
Phase
LRI-002 Ma
On Kong Channel KT13 - Residue Impact on Landscape Resource - Operation Phase
(day 1)
LRI-003 Ma
On Kong Channel KT13 - Residue Impact on Landscape Resource - Operation Phase
(10 Years)
LC-001 Ma
On Kong Channel KT13 - Landscape Character Baseline
PC-001 Ma
On Kong Channel KT13 - Landscape Character Photos (Sheet 1 of 2)
PC-002 Ma
On Kong Channel KT13 - Landscape Character Photos (Sheet 2 of 2)
LCI-001 Ma
On Kong Channel KT13 - Residue Impact on Landscape Character - Construction
Phase
LCI-002 Ma On Kong Channel KT13 - Residue Impact on Landscape Character - Operation Phase (day 1)
LCI-003 Ma
On Kong Channel KT13 - Residue Impact on Landscape Character - Operation Phase
(10 Years)
V-001 Ma
On Kong Channel KT13 - VSRs baseline
for Primary ZVI
V-002 Ma
On Kong Channel KT13 - VSRs baseline
for Secondary ZVI
PV-001 Ma
On Kong Channel KT13 - VSRs Photos (Sheet 1 of 2)
PV-002 Ma
On Kong Channel KT13 - VSRs Photos (Sheet 2 of 2)
VI-001 Ma
On Kong Channel KT13 - Residue Visual Impact - Construction Phase
VI-002 Ma
On Kong Channel KT13 - Residue Visual Impact - Operation Phase (day 1)
VI-003 Ma
On Kong Channel KT13 - Residue Visual Impact - Operation Phase (10 Years)
LP-001 Ma
On Kong Channel KT13 - Landscape Mitigation Plan (Sheet 1 of 2)
LP-002 Ma
On Kong Channel KT13 - Landscape Mitigation Plan (Sheet 2 of 2)
PM-001 Ma
On Kong Channel KT13 - Photomontages
PM-002 Ma
On Kong Channel KT13 - Photomontages
PM-003 Ma
On Kong Channel KT13 – Photomontages
PM-004 Ma On Kong Channel KT13 - Photomontages
Figure 11.1 Proposed
Air Monitoring Locations and Representative Air Sensitive Receivers
Figure 11.2 Proposed
Noise Monitoring Locations and Representative Noise Sensitive Receivers
Figure 11.3a Locations of Water Quality
and Sediment Quality Monitoring Stations
Figure 11.3b Locations of Water
Quality and Sediment Quality Monitoring Stations
Figure 11.4 Locations
of Cultural Heritage Resources Monitoring
Figure 11.5 Ecology
Monitoring Areas Recommended for Construction Phase and Operation Phase
Figure F1 Cross Section View of Construction Site and Proposed Noise Barriers
Figure K1 KT13 and its relation with catchments in Northwest New Territories
Figure K2a Ma On Kong Channel KT13 Proposed Layout Plan (Sheet 1 of 2)
Figure K2b Ma On Kong Channel KT13 Proposed Layout Plan (Sheet 2 of 2)
Plate
4.1 Woodland
north of the Ho Pui Egretry
Plate 4.2 Shrubland
behind Ma On Kong
Plate 4.3 Marsh
Showing Two of the Dominant Plants, Colocasia
esculenta, and Commelina nudiflora
Plate 4.4 An
abandoned pond at the upstream section of the KT13
The
water surface was covered with Eichhornia
crassipes
Plate 4.5 A
stream section, southwest of the Ho Pui Village
Plate 4.6 Grassland
east of the Ho Pui Village
Plate 4.7 Hillside
grassland behind Ma On Kong
Plate 4.8 Agricultural
land east of Cheung Po Village
Plate 4.9 Orchard
north of the Ho Pui Village
Plate 4.10 Michelia elba in Cheung Po
Plate 4.11 Michelia figo in Ma On Kong
Plate 4.12 Rhododendron championae in the Shrubland
behind Ma On Kong
Plate 4.13 Dead
Chinese Cobra Naja atra at KT13
Plate 4.14 Dead
Musk Shrew Suncus murinus at KT13
Plate 4.15 Top:
Cattle Egret standing on a pile of mud in the Ho Pui Egretry
Bottom:
The overview of the Ho Pui Egretry
Plate 4.17 A
Breeding Chinese Pond Heron Aideola
bacchus standing on a Fruit Tree in the Egretry
Plate 4.18 Le
Seine River near Giverny, France
Rocks
on Channel Margin for Protection against Erosion
Plate 4.19 Gabion
Lined River Banks in Maryland, US
Plate 4.20 Gabion
Lined Stream Bank and Bottom in Scidy, Italy
Plate 4.22 Gabion
Channels in Mui Wo, Lantau Island
Plate 9.1 Finds
from Auger hole tests 14 (right) and 15 (left) in Unit 3
Plate 9.2 Test
Pit 5, context 2
Plate 9.3 Test
Pit 5, context 4 (left) and context 5 (right)
Plate 9.4 Test
Pit 6, context 1
Plate 9.5 Test
Pit 6, context 2
Plate 9.6 Test
Pit 6, large vessel recorded in context 3
Plate 9.7 Test
Pit 6, context 4
Plate 9.8 Test Pit 6, context 4. Sherd from within the large vessel
Plate
9.9 Aerial
View of the Study Area, 8.5.49 (Y 01904, sheet no.6)
Plate 9.10 Aerial
View of the Study Area, 20.10.64 (Y 11598, sheet no.6)
Plate 9.11 Aerial
View of the Study Area, 20.10.64 (Y 11599, sheet no.6)
Plate 9.12 Aerial View of the Study Area, 8.2.99 (CN 22574, sheet no.6)