CONTENTS
		Page
1.	INTRODUCTION	1-2
1.1	Project Background	1-2
1.2	Requirements under the Environmental Impact Assessment Ordinance	1-2
1.3	Purpose of the EIA Study	1-3
1.4	Objectives of the EIA Study	1-3
1.5	Structure of the Report	1-4
2.	PROJECT DESCRIPTION	2-2
2 2.1	Project Objectives	2-2
2.2	Site History and Project Location	2-2
2.3	Project Scope	2-3
2.4	Need for the Project	2-4
2.5	Benefits of the Project	2-5
2.6	Without Project Scenario	2-6
2.7	With Project Scenario	2-6
2.8	Design Considerations	2-7
2.9	Consideration of Alternatives Location, Design and Layout	2-7
2.10	Construction Aspects of the Project	2-14
2.11	Consideration of Alternative Construction Methods	2-16
2.12	Consideration of Alternative Construction Sequence	2-17
2.13	Implementation Programme	2-17
2.14	Concurrent Projects	2-18
2.15	Sustainability Considerations	2-20
2.16	Continuous Public Involvement	2-21
2.17	References	2.23
3.	AIR QUALITY IMPACT ASSESSMENT	3-2
3 3.1	Introduction	3-2
3.2	Statutory Requirements and Evaluation Criteria	3-2
3.3	Study Area	3-3
3.4	Identification of Air Sensitive Receivers	3-3
3.5	Existing Air Quality	3-4
3.6	Evaluation of Impacts during Construction Phase	3-7
3.7	Evaluation of Impacts during Operation Phase	3-10
3.8	Mitigation Measures	3-10
3.9	Potential for Cumulative Impacts	3-11
3.10	Residual Impacts	3-12
3.11	Monitoring and Audit Requirements	3-13
3.12	Conclusion	3-13
4.	NOISE IMPACT ASSESSMENT	4-2
4 4.1	Introduction	4-2
4.2	Environmental Legislation, Policies, Standards and Criteria	4-2
4.3	Baseline Conditions	4-7
4.4	Noise Sensitive Receivers	4-8
4.5	Potential Sources of Impacts	4-9
4.6	Assessment Methodology	4-11
4.7	Impact Assessment	4-14
4.8	Mitigation Measures	4-16
4.9	Cumulative Impacts	4-22
4.10	Residual Impacts	4-22
4.11	Monitoring and Audit Requirement	4-23
4.12	Conclusion	4-23
5.	WATER QUALITY IMPACT ASSESSMENT	5-2
5 5.1	Introduction	5-2
5.2	Environmental Legislation, Policies, Standards and Criteria	5-2
5.3	Study Area	5-7
5.4	Baseline Water Quality Conditions	5-7
5.5	Water Sensitive Receivers	5-12
5.6	Water Sources of Impacts	5-12
5.7	Impact Assessment	5-13
5.8	Mitigation Measures	5-17
5.9	Cumulative Impacts	5-22
5.10	Residual Impacts	5-24
5.11	Monitoring and Audit Requirement	5-24
5.12	Conclusion	5-25
6.	WASTE MANAGEMENT AND LAND CONTAMINATION	6-2
6 6.1	Introduction	6-2
6.2	Relevant Legislation, Policies, Standards and Criteria	6-2
6.3	Assessment Methodology	6-6
6.4	Expected Waste Sources	6-6
6.5	Waste Management Assessment	6-7
6.6	Mitigation Measures	6-13
6.7	Land Contamination	6-18
6.8	Residual Environmental Impacts	6-21
6.9	Environmental Monitoring and Audit Requirements	6-21
6.10	Conclusion	6-22
7.	ECOLOGICAL IMPACT ASSESSMENT	7-2
7 7.1	Introduction	7-2
7.2	Statutory Requirements and Evaluation Criteria	7-3
7.3	Assessment Area	7-6
7.4	Methodology for Baseline Establishment	7-6
7.5	Baseline Condition	7-8
7.6	Identification of Ecological Impacts	7-10
7.7	Potential for Cumulative Impacts	7-28
7.8	Mitigation	7-30
7.9	Precautionary Measures	7-46
7.10	Residual Impacts	7-46
7.11	Monitoring and Audit Requirements	7-48
7.12	Conclusion	7-48
7.13	References	7-51
8.	FISHERIES IMPACT ASSESSMENT	8-2
8 8.1	Introduction	8-2
8.2	Statutory Requirements and Evaluation Criteria	8-2
8.3	Assessment Area	8-2
8.4	Assessment Methodology	8-3
8.5	Baseline Condition	8-3
8.6	Evaluation of Impacts during Construction Phase	8-8
8.7	Evaluation of Impacts during Operational Phase	8-10
8.8	Mitigation Measures	8-11
8.9	Potential for Cumulative Impacts	8-13
8.10	Residual Impacts	8-13
8.11	Monitoring and Audit Requirements	8-13
8.12	Conclusion	8-13
8.13	References	8-14
9.	CULTURAL HERITAGE IMPACT ASSESSMENT	9-2
9 9.1	Introduction	9-2
9.2	Relevant Legislation, Standards & Guidelines	9-2
9.3	BHIA Methodology	9-5
9.4	Baseline Review	9-9
9.5	Impact Assessment	9-14
9.6	Mitigation Recommendations	9-30
9.7	Cumulative and Residual Impacts	9-32
9.8	Conclusion	9-32
9.9	Environmental Monitoring and Audit	9-33
9.10	References and Bibliography	9-38
10.	LANDSCAPE AND VISUAL IMPACT ASSESSMENT	10-2
10 10.1	Introduction	10-2
10.2	Environmental Legislation, Policies, Standards and Criteria	10-2
10.3	Scope and Content of Study	10-7
10.4	Landscape and Visual Impact Assessment Methodology	10-9
10.5	Planning and Development Control Framework	10-17
10.6	Baseline Study	10-21
10.7	Landscape Impact Assessment	10-42
10.8	Visual Impact Assessment	10-67
10.9	Cumulative Impacts	10-93
10.10	Residual Impact	10-93
10.11	Monitoring and Audit Requirements	10-94
10.12	Conclusion	10-95
11.	ENVIRONMENTAL MONITORING AND AUDIT REQUIREMENTS	11-2
11 11.1	Introduction	11-2
11.2	EM&A Manuel	11-2
11.3	Air Quality	11-3
11.4	Noise	11-3
11.5	Water Quality	11-4
11.6	Waste Management	11-4
11.7	Ecology	11-5
11.8	Fisheries	11-6
11.9	Cultural Heritage	11-6
11.10	Landscape and Visual	11-6
11.11	Implementation Schedule	11-7
12.	SUMMARY OF ENVIRONMENTAL OUTCOMES	12-2
12 12.1	Introduction	12-2
12.2	Environmental Benefits of the Project	12-2
12.3	Environmental Friendly Options Considered	12-3
12.4	Environmental Friendly Design Recommended	12-4
12.5	Estimated Population and Environmentally Sensitive Areas Protected	12-5
12.6	Key Environmental Problems Avoided and Compensation Areas Included	12-6
12.7	Environmental Benefits of Environmental Protection Measures Recommended	12-7
13.	CONCLUSION	13-2
13 13.1	Introduction	13-2
13.2	Air Quality Impact	13-3
13.3	Noise Impact	13-3
13.4	Water Quality Impact	13-3
13.5	Waste Management and Land Contamination	13-4
13.6	Ecological Impact	13-5
13.7	Fisheries Impact	13-7
13.8	Cultural Heritage Impact	13-7
13.9	Landscape and Visual Impact	13-8
13.10	Environmental Monitoring and Audit (EM&A)	13-8
13.11	Overall Conclusion	13-9
	END OF TEXT

LIST OF TABLES

Table 2.1	Summary of Project Scope
Table 2.2	Rainfall Increase and Sea Level Rise due to Climate Change
Table 2.3	Comparison Summary of Options A and B
Table 2.4	Summary of Operation Scenarios for the Barrage Scheme
Table 2.5	Key Construction Phases & Description
Table 2.6	Potential Concurrent Projects
Table 3.1	Hong Kong Air Quality Objectives
Table 3.2	Identified Representative Air Sensitive Receivers
Table 3.3	5-year Averaged Annual Background Concentration of Air Pollutants recorded at Yuen Long Station by EPD for the Period of 2015-2019
Table 3.4	Dust Concentrations extracted from PATH-2016 Model
Table 4.1	EIAO-TM Day-time Construction Noise Standards
Table 4.2	Area Sensitivity Ratings
Table 4.3	Acceptable Noise Levels (ANLs) for General Construction Works to be carried out during Restricted Hours (GW-TM)
Table 4.4	ANLs for Fixed Noise Source under NCO
Table 4.5	Measured Baseline Noise Levels
Table 4.6	Representative Noise Sensitive Receivers (NSRs)
Table 4.7	Predicted Construction Noise Levels (Without Mitigation Measures)
Table 4.8	Predicted Fixed Plant Noise Levels due to the Proposed Pumping Stations
Table 4.9	Sound Power Level of Quiet PME
Table 4.10	Sound Pressure Level of Quiter Equipment/Methods
Table 4.11	Predicted Construction Noise Levels (With Mitigation Measures)
Table 5.1	Water Quality Objectives of the Deep Bay Water Control Zones
Table 5.2	Summary of River Water Quality Monitoring Data collected by EPD River Water Quality Monitoring Programme for Stations in YLTN, MN and SHN (2018)
Table 5.3	Summary of River Water Quality Monitoring Data collected by EPD River Water Quality Monitoring Programme for Stations in Kam Tin River (2018)
Table 5.4	Summary of EPD¡¦s Routine Marine Water Quality Data for Inner Deep Bay WCZ in Year 2018
Table 5.5	Water Sampling Result in YLTN EIA
Table 6.1	Government Facilities for Disposal of C&D Materials
Table 6.2	Estimated Quantities of C&D Materials and Other Wastes during Construction
Table 6.3	Estimated Quantities of Sediment under Disposal Option
Table 6.4	Review of Historical Aerial Photographs
Table 7.1	Ecological Survey Programme from July 2019 to July 2020
Table 7.2	Habitat Evaluation
Table 7.3	Estimated Loss of Area of Each Habitat Type
Table 7.4	Comparison of Waterbirds¡¦ Abundance among the Assessment Area, Nam Sang Wai, Shan Pui River and Deep Bay Area during the Ecological Survey Period
Table 7.5	Potential Cumulative Ecological Impact from Concurrent Projects
Table 7.6	Summary of Construction Phase and Operational Phase Impacts
Table 8.1	Baseline Information of Fisheries Resources in the Assessment Area
Table 8.2	Fishpond Area and Annual Fish Production in Hong Kong from 2009 to 2018
Table 8.3	Recent Figures of Hong Kong Capture Fisheries Industry
Table 8.4	Summary of Capture Fisheries Data in Deep Bay WCZ
Table 8.5	Top Ten Families / Groups of Fish Catch in Hong Kong Waters
Table 8.6	Fisheries Impact on Active and Inactive Fishponds within the Assessment Area
Table 9.1	Recorded Not-Graded and Nil-Grade Buildings
Table 9.2	Graded Historic Buildings
Table 9.3	Other Heritage Items (Not-Graded and Nil-Grade)
Table 9.4	Fung Shui Woodlands
Table 9.5	Summary of Recommended Mitigation Measures Prior and During the Construction Phase
Table 10.1	Relationship between Receptor Sensitivity and Magnitude of Change in Defining Impact Significance
Table 10.2	Landscape Resources
Table 10.3	Sensitivity of Landscape Resources
Table 10.4	Landscape Character Areas
Table 10.5	Sensitivity of Landscape Character Areas
Table 10.6	Key Visually Sensitive Receivers (VSRs)
Table 10.7	Magnitude of Landscape Change during the Construction and Operation Phases before Mitigation
Table 10.8	Proposed Construction Phase Landscape and Visual Mitigation Measures
Table 10.9	Proposed Operation Phase Landscape and Visual Mitigation Measures
Table 10.10	Significance of Landscape Impacts in Construction and Operation Phases (Adverse Impacts unless otherwise stated)
Table 10.11	Magnitude of Visual Change during the Construction and Operation Phases before Mitigation
Table 10.12	Significance of Visual Impacts in Construction and Operation Phases
Table 10.13	Summary of Visual Impacts of VPs at Photomontage Viewpoints
Table 12.1	Summary of Key Environmental Problems Avoided and Sensitive Areas Protected
Table 12.2	Key Recommended Mitigation Measures and Associated Environmental Benefits

LIST OF APPENDICES (VOLUME 2)

Appendix 1.1	Engineering Drawings Drawing No. 400171/LAY/001 Drawing No. 400171/LAY/002 Drawing No. 400171/LAY/003 Drawing No. 400171/LAY/004 Drawing No. 400171/LAY/101 Drawing No. 400171/LAY/102 Drawing No. 400171/LAY/201 Drawing No. 400171/LAY/202 Drawing No. 400171/LAY/402 Drawing No. 400171/LAY/501 Drawing No. 400171/LAY/502 Drawing No. 400171/LAY/601
Appendix 2.1	Flood Extent Maps of ¡§Without Project Scenario¡¨
Appendix 2.2	Flood Extent Maps of ¡§With Project Scenario¡¨
Appendix 2.3	Comparison Table of the Proposed Layouts
Appendix 2.4	Visual Illustration and Indicative Details of Conceptual Operation Modes
Appendix 2.5	Public Comments on Project Profile
Appendix 4.1	Construction Programme
Appendix 4.2	Plant Inventory
Appendix 4.3	Noise Calculation for Predicted Façade Noise Levels During Daytime Period
Appendix 4.4	Plant Inventory
Appendix 4.5	Calculation for Mitigated Noise Levels at the Representative NSRs
Appendix 4.6	Noise Calculation for Predicted Noise Levels at All the Representative NSRs
Appendix 4.7	Baseline Noise Measurement Locations
Appendix 4.8	Locations of Identified Representative NSRs
Appendix 4.9	Schematic Configuration of Movable Noise Barrier
Appendix 4.10	Noise Insulating Sheet
Appendix 6.1a	Sediment Sampling & Testing Plan
Appendix 6.1b	CEDD¡¦s memo on Rationale for Sediment Removal
Appendix 6.2	Sediment Quality Report
Appendix 6.3	Historical Aerial Photos
Appendix 6.4	Existing Site Conditions
Appendix 6.5	Relevant Correspondences with FSD and EPD
Appendix 7.1	Ecological Baseline Report
Appendix 9.1	Graded Historic Buildings Catalogue
Appendix 9.2	Not-Graded and Nil-Grade Built Heritage Catalogue
Appendix 9.3	Fung Shui Woodlands Catalogue
Appendix 10.1	Broad Brush Tree Survey
Appendix 11.1	Implementation Schedule of Environmental Protection Measures for the Project
Appendix 13.1	Summary of Environmental Impacts Associated with the Project
Appendix 13.2	Key Assessment Assumptions and Limitations of Assessment Methodologies

LIST OF FIGURES (VOLUME 3)

Figure 1.1	Location Plan of Sensitive Receivers and Area of Conservation Importance
Figure 3.1	Air Sensitive Receivers (Key Plan)
Figure 3.2	Air Sensitive Receivers
Figure 3.3	Air Sensitive Receivers
Figure 3.4	Air Sensitive Receivers
Figure 3.5	Air Sensitive Receivers
Figure 3.6	Air Sensitive Receivers
Figure 4.1	Noise Sensitive Receivers and Proposed Works Areas (Key Plan)
Figure 4.2	Noise Sensitive Receivers and Proposed Works Areas
Figure 4.3	Noise Sensitive Receivers and Proposed Works Areas
Figure 4.4	Noise Sensitive Receivers and Proposed Works Areas
Figure 4.5	Noise Sensitive Receivers and Proposed Works Areas
Figure 4.6	Noise Sensitive Receivers and Proposed Works Areas
Figure 5.1	EPD¡¦s Marine Water Quality Monitoring Station
Figure 5.2	Water Sensitive Receivers
Figure 5.3	Arrangement of Works within Yuen Long Nullah
Figure 5.4	General Arrangement of Energy Dissipators
Figure 6.1	Sampling Location Plan
Figure 7.1	Proposed Layout of the Barrage overlaid with Habitat Map
Figure 8.1	Location of Oyster Culture Area in Deep Bay
Figure 8.2	Active and Inactive Fishponds in the Assessment Area
Figure 9.1	Location of Heritage Resources within the Built Heritage Survey Study Area
Figure 9.2	Built Heritage Resources in Lung Tin Tsuen
Figure 9.3	Built Heritage Resources in Ko Po Tsuen
Figure 9.4	Built Heritage Resources in Sham Chung Tsuen
Figure 9.5	Built Heritage Resources in Tin Liu Tsuen
Figure 9.6	Built Heritage Resources in Ma Tin Tsuen
Figure 9.7	Built Heritage Resources in Tai Kiu
Figure 9.8	Built Heritage Resources in Wang Chau Tung Tau Wai
Figure 9.9	Built Heritage Resources in Wang Chau Lam Uk Tsuen and Yeung Uk Tsuen
Figure 9.10	Built Heritage Resources in Shan Pui Chung Hau Tsuen North
Figure 9.11	Built Heritage Resources in Shan Pui Chung Hau Tsuen South
Figure 10.00a	Aerial Photograph ¡V Yuen Long Barrage Scheme
Figure 10.00b	Aerial Photograph - Kam Tin River Parapet Modifications
Figure 10.01a	Site Layout Plan ¡V Yuen Long Barrage Scheme
Figure 10.01b	Site Layout Plan ¡V Kam Tin River Parapet Modifications
Figure 10.02	Review of Planning and Development Control Framework
Figure 10.10	Landscape Resources (Sheet 1 of 4)
Figure 10.11	Landscape Resources (Sheet 2 of 4)
Figure 10.12	Landscape Resources (Sheet 3 of 4)
Figure 10.13	Landscape Resources (Sheet 4 of 4)
Figure 10.14	Landscape Resources Photographs (Sheet 1 of 3)
Figure 10.15	Landscape Resources Photographs (Sheet 2 of 3)
Figure 10.16	Landscape Resources Photographs (Sheet 3 of 3)
Figure 10.17a	Residual Impacts on Landscape Resources with Mitigation Year10 (Sheet 1 of 4)
Figure 10.17b	Residual Impacts on Landscape Resources with Mitigation Year10 (Sheet 2 of 4)
Figure 10.17c	Residual Impacts on Landscape Resources with Mitigation Year10 (Sheet 3 of 4)
Figure 10.17d	Residual Impacts on Landscape Resources with Mitigation Year10 (Sheet 4 of 4)
Figure 10.20	Landscape Character Areas (Sheet 1 of 2)
Figure 10.21	Landscape Character Areas (Sheet 2 of 2)
Figure 10.22	Landscape Character Areas Photographs (Sheet 1 of 2)
Figure 10.23	Landscape Character Areas Photographs (Sheet 2 of 2)
Figure 10.24a	Residual Impacts on Landscape Character Areas (Sheet 1 of 2)
Figure 10.24b	Residual Impacts on Landscape Character Areas (Sheet 2 of 2)
Figure 10.30	Key Visual Elements and Photomontage Viewpoints
Figure 10.31	Zone of Visual Influence, Key VSRs and Photomontages Viewpoints (Sheet 1 of 4)
Figure 10.32	Zone of Visual Influence, Key VSRs and Photomontages Viewpoints (Sheet 2 of 4)
Figure 10.33	Zone of Visual Influence, Key VSRs and Photomontages Viewpoints (Sheet 3 of 4)
Figure 10.34	Zone of Visual Influence, Key VSRs and Photomontages Viewpoints (Sheet 4 of 4)
Figure 10.35	Photographs of VSRs (Sheet 1 of 6)
Figure 10.36	Photographs of VSRs (Sheet 2 of 6)
Figure 10.37	Photographs of VSRs (Sheet 3 of 6)
Figure 10.38	Photographs of VSRs (Sheet 4 of 6)
Figure 10.39a	Photographs of VSRs (Sheet 5 of 6)
Figure 10.39b	Photographs of VSRs (Sheet 6 of 6)
Figure 10.40a	Residual Impacts on VSRs with Mitigation Year10 (Sheet 1 of 4)
Figure 10.40b	Residual Impacts on VSRs with Mitigation Year10 (Sheet 2 of 4)
Figure 10.40c	Residual Impacts on VSRs with Mitigation Year10 (Sheet 3 of 4)
Figure 10.40d	Residual Impacts on VSRs with Mitigation Year10 (Sheet 4 of 4)
Figure 10.50a	Photomontages ¡V VP1 (Sheet 1 of 2)
Figure 10.50b	Photomontages ¡V VP1 (Sheet 2 of 2)
Figure 10.51a	Photomontages ¡V VP2 (Sheet 1 of 2)
Figure 10.51b	Photomontages ¡V VP2 (Sheet 2 of 2)
Figure 10.52a	Photomontages ¡V VP3 (Sheet 1 of 2)
Figure 10.52b	Photomontages ¡V VP3 (Sheet 2 of 2)
Figure 10.53a	Photomontages ¡V VP4 (Sheet 1 of 2)
Figure 10.53b	Photomontages ¡V VP4 (Sheet 2 of 2)
Figure 10.54a	Photomontages ¡V VP5 (Sheet 1 of 2)
Figure 10.54b	Photomontages ¡V VP5 (Sheet 2 of 2)
Figure 10.55a	Photomontages ¡V VP6 (Sheet 1 of 2)
Figure 10.55b	Photomontages ¡V VP6 (Sheet 2 of 2)
Figure 10.57a	Photomontages ¡V VP7 (Sheet 1 of 2)
Figure 10.57b	Photomontages ¡V VP7 (Sheet 2 of 2)
Figure 10.57c	Photomontages ¡V VP8 (Sheet 1 of 2)
Figure 10.57d	Photomontages ¡V VP8 (Sheet 2 of 2)
Figure 10.58a	Photomontages ¡V VP9 (Sheet 1 of 2)
Figure 10.58b	Photomontages ¡V VP9 (Sheet 2 of 2)
Figure 10.59a	Photomontages ¡V VP10 (Sheet 1 of 2)
Figure 10.59b	Photomontages ¡V VP10 (Sheet 2 of 2)
Figure 10.59c	Photomontages ¡V VP11 (Sheet 1 of 2)
Figure 10.59d	Photomontages ¡V VP11 (Sheet 2 of 2)
Figure 10.60a	Landscape & Visual Mitigation Measures Plan (Sheet 1 of 2)
Figure 10.60b	Landscape & Visual Mitigation Measures Plan (Sheet 2 of 2)
Figure 10.61A	Barrage Mitigation ¡V Plan
Figure 10.61B	Barrage Mitigation ¡V Elevation A - Northwest
Figure 10.61C	Barrage Mitigation ¡V Elevation B - Southwest
Figure 10.61D	Barrage Mitigation ¡V Elevation C - Northeast
Figure 10.70	Landscape Resources ¡V Existing & Affected Trees (Sheet 1 of 4)
Figure 10.71	Landscape Resources ¡V Existing & Affected Trees (Sheet 2 of 4)
Figure 10.72	Landscape Resources ¡V Existing & Affected Trees (Sheet 3 of 4)
Figure 10.73	Landscape Resources ¡V Existing & Affected Trees (Sheet 4 of 4)
Figure 10.80	Typical Nullah Mitigation ¡VSection A
Figure 10.81	Typical Nullah Mitigation ¡VSection B
Figure 10.82	Typical Nullah Mitigation ¡VSection C
Figure 10.83	Typical Nullah Mitigation ¡VSection D
Figure 10.90	Typical Vertical Greening Detail