Consultancy Ref.: AFCD/FIS/02/19 Consultancy Service for Environmental Impact Assessment Study for Designation of New Fish Culture Zones

 

Environmental Impact Assessment (EIA) Report for Establishment of Fish Culture Zone at Mirs Bay

November 2022

EIA REPORT (HTML)

TABLE OF CONTENTS

1.         INTRODUCTION

2.         PROJECT DESCRIPTION

3.         WATER QUALITY

4.         MARINE ECOLOGY

5.         FISHERIES

6.         WASTE MANAGEMENT

7.         VISUAL

8.         AIR QUALITY

9.         NOISE

10.      CULTURAL HERITAGE

11.      ENVIRONMENTAL MONITORING AND AUDIT

12.      SUMMARY OF ENVIRONMENTAL OUTCOMES

13.      CONCLUSION

 

 

 

LIST OF FIGURES

Figure 1.1        Location Plan for the Establishment of Fish Culture Zone (FCZ) at Mirs Bay

Figure 2.1        Potential Areas for Development of Fish Culture Zones based on Constraint Mapping

Figure 2.2        Proposed Locations for the Establishment of Fish Culture Zones

Figure 2.3        Example of the Traditional Fish Farms

Figure 2.4        Example of the Floating Gravity Cage

Figure 2.5        Example of Newer Type of Mariculture

Figure 2.6        Example of Submersible Cage for Fish Culture

Figure 2.7        Sample Layout of IMTA

Figure 2.8        Example of Deep Cage for Echinoderm Culture

Figure 2.9        Examples of (a) Lantern Nets and (b) Longlines for Bivalve Culture

Figure 2.10      Example of Semi-submersible Steel Truss Cage

Figure 3.1        Location of Water Sensitive Receivers and Nearby EPD Marine Water / Sediment Quality Monitoring Stations

Figure 4.1        Representative Photos of Coral Survey at Mirs Bay

Figures 4.2a-d Representative Photos of Drop Camera Survey at Mirs Bay

Figure 4.3        Area of Avoidance for the Construction and Operational Activities within the Proposed   Mirs Bay FCZ

Figure 5.1        Fisheries Sensitive Receivers in the Assessment Area

Figure 5.2        Distribution of Fishing Operations (All Vessels) in Northeastern Hong Kong Waters as recorded in AFCD Port Survey 2016/17

Figure 5.3        Distribution of Fisheries Production (All Vessels) in Northeastern Hong Kong Waters as recorded in AFCD Port Survey 2016/17

Figure 7.1        VIA Assessment Area and Locations of Proposed Vantage Points (VPs) for Proposed Mirs Bay FCZ

Figure 7.2        Planning & Development Context near Proposed Mirs Bay FCZ

Figure 7.3        Detailed Locations of Proposed Vantage Points (VP1 to VP5) and Identified Zone of Visual Influence for Proposed Mirs Bay FCZ

Figure 7.4        Aerial View of Detailed Locations of Proposed Vantage Points (VP1 to VP5) and Identified Zone of Visual Influence for Proposed Mirs Bay FCZ

Figure 7.5a&b Mirs Bay Viewpoint 1 – View to Project Site from Tap Mun

Figure 7.6a&b Mirs Bay Viewpoint 2 – View to Project Site from Kau Lau Wan

Figure 7.7a&b Mirs Bay Viewpoint 3 – View to Project Site from Nam She Wan

Figure 7.8a&b Mirs Bay Viewpoint 4 – View to Project Site from Sharp Peak, hiking trail at Sai Kung East Country Park

Figure 7.9a&b Mirs Bay Viewpoint 5 – View to Project Site from Tai Tan Country Trail

Figure 8.1        Locations of Representative Air Sensitive Recievers

Figure 9.1        Locations of Noise Sensitive Receivers for Proposed Mirs Bay FCZ

Figure 10.1      Locations of Sonar Contacts at the Proposed FCZ at Mirs Bay

Figure 10.2      Example of Side Scan Sonar (SSS) Mosiac of Site C1 Showing Areas with Rock Outcrop

Figure 10.3      SSS Rectified Image Showing Sonar Contact C1-SC006

Figure 10.4      Example of Side Scan Sonar (SSS) Mosiac of Site C2 Showing Areas with Rock Outcrop

Figure 10.5      SSS Rectified Image Showing Numerous Trawl Scars in Site C2

Figure 10.6      SSS Rectified Image Showing Possible Dumped Materials/ Boulders (NW-SE Orientation) in Site C2

Figure 10.7      SSS Rectified Images Showing Sonar Contact C2-SC023 from Different Survey Lines in Site C2

 

 

LIST OF APPENDICES

Appendix 1A   Stakeholder Engagement Activities

Appendix 2A   Operation Measures and Practices

Appendix 3A   Water Quality Modelling Plan for Mirs Bay Fish Culture Zone

Appendix 3B   Assessment of Carrying Capacity of the Project Site

Appendix 3C   Contour Plots of Water Quality Parameter

Appendix 3D   Comparison of Observed Water Quality Against Time Series Plots of Predicted Water Quality at EPD Water Quality Monitoring Stations near Project Site

Appendix 4A   Literature Review – Marine Ecology

Appendix 4B   Approved Method Statement on Marine Ecological Impact Assessment for Mirs Bay FCZ

Appendix 4C   Survey Data of Subtidal and Benthic Assemblages

Appendix 5A   Approved Method Statement on Fisheries Impact Assessment of Mirs Bay FCZ

Appendix 9A   Photographs of Representitive Noise Sensitive Receivers (NSRs)

Appendix 9B   Indicative Construction Plant Inventory

Appendix 10A United Kingdom Hydrographic Office ‘Wreck’ Files

Appendix 10B Survey Track Plots

Appendix 10C Side Scan Sonar Images of Sonar Contacts

Appendix 11A Implementation Schedule of Recommended Environmental Protection Measures / Mitigation Measures

 

 

LIST OF TABLES

Table 2.1       Summary of the Key Considerations of Site Selection Criteria

Table 2.2       Summary of Site Evaluation

Table 2.3       Proposed Organisms and Example Species for IMTA

Table 2.4       Summary of Environmental Benefits and Dis-benefits of the Development Options and Alternative Mitigation Measures Considered for the Project

Table 3.1       Summary of Water Quality Objectives for Mirs Bay WCZ and Tolo Harbour and Channel WCZ

Table 3.2       Summary of EPD Routine Water Quality Monitoring Data from Selected Stations of the Tolo Harbour and Channel WCZ and Mirs Bay WCZ (1986 – 2020)

Table 3.3       Summary of EPD Routine Sediment Monitoring Data from Selected Stations of the Tolo Harbour and Channel WCZ and Mirs Bay WCZ (1986 – 2020)

Table 3.4       Water Sensitive Receivers (WSRs) in the Vicinity of the Proposed FCZ Site at Mirs Bay

Table 3.5       Summary of Assessment WQO Criteria

Table 3.6       Summary of Applicable Assessment Criterion for Identified WSRs

Table 3.7       Pollution Loading Contribution from Wasted Feed and Fish Faeces for Production Level of 1 ton at Proposed FCZs

Table 3.8       Predicted Water Quality under Baseline and Project Scenario

Table 4.1       Marine Ecological Baseline Surveys

Table 4.2       Density and Indices of Richness, Evenness and Diversity of Infaunal Assemblages at the Sampling Locations for the Soft Bottom Habitat Surveys at the Assessment Area during the Wet Season

Table 4.3       Density and Indices of Richness, Evenness and Diversity of Infaunal Assemblages at the Sampling Locations for the Soft Bottom Habitat Surveys at the Assessment Area during the Dry Season

Table 4.4       Description of the Seabed Recorded along Each Transect during the Qualitative Surveys (Spot Dive Reconnaissance Check Surveys)

Table 4.5       Marine Ecological Importance of Existing Marine Parks and SSSI within the Assessment Area

Table 4.6       Ecological Importance of Intertidal Habitats within and in the vicinity of the Project site

Table 4.7       Ecological Importance of Subtidal Hard-Bottom Habitats within and in the vicinity of the Project site

Table 4.8       Ecological Importance of Subtidal Soft Benthos Assemblages within the Project site

Table 4.9       Ecological Importance of Marine Waters

Table 4.10     Species of Conservation Importance within the Assessment Area

Table 4.11     Approximate Shortest Distance to Marine Ecological Sensitive Receivers (SRs) around the Project site

Table 4.12     Significance of Marine Ecological Impacts Associated with the Construction and Operation of the Project Evaluated in accordance with EIAO-TM

Table 5.1       Marine Culture Fisheries Summary Statistics 2008-2021 (Source: AFCD)

Table 5.2       Distances between the FCZs in the Assessment Area and the Proposed FCZ at Mirs Bay

Table 5.3       Main Commercial Families of Fisheries Resources in Northeastern Hong Kong Waters from Fishery Surveys (Source: AFCD Hong Kong Fisheries Resources Monitoring Report (2010-2015))

Table 5.4       Evaluation of Fisheries Impacts in accordance with the Criteria described in Annex 9 of the EIAO-TM

Table 6.1       Government Waste Disposal Facilities for Construction Waste

Table 6.2       Tentative Transportation Routings for Waste Disposal of General Refuse during Construction Phase

Table 6.3       Tentative Transportation Routings for Waste Disposal of Various Waste during Operation Phase

Table 6.4       Summary of Estimated Waste Arisings and Recommended Waste Management Arrangements

Table 7.1       Relationship between receptor sensitivity and magnitude of change in defining impact significance

Table 7.2       VSRs within the Predicted Visual Envelope

Table 7.3       Magnitude of Change

Table 7.4       Visual Impacts Prior to Mitigation

Table 7.5       Un-mitigated and Mitigated Impacts at the VSRs

Table 8.1       Hong Kong Air Quality Objectives

Table 8.2       Identified Representative ASRs

Table 8.3       Concentrations of Air Pollutants Measured at EPD’s Tap Mun AQMS in the Recent Five Years (2016 to 2020)

Table 8.4       Background Air Pollutant Concentrations Predicted by the PATH v2.1 Model in 2024

Table 9.1       EIAO-TM Daytime Construction Noise Standards (Leq(30min) dB(A))

Table 9.2       Area Sensitivity Ratings (ASRs)

Table 9.3       Acceptable Noise Levels of General Construction Works

Table 9.4       Acceptable Noise Levels (ANLs) of Operational Noise

Table 9.5       Identified Representative NSRs

Table 10.1     Survey Types with Objectives and Survey Spacing

Table 10.2     Equipment List

Table 10.3     Sonar Contacts Summary Table for Site C1

Table 10.4     Sonar Contacts Summary Table for Site C2

Table 12.1     Key Environmental Problems Avoided, Sensitive Areas Protected and Environmental Outcomes achieved

Table 12.2     Key Recommended Environmental Protection / Mitigation Measures and their Associated Benefits

Table 13.1     Summary of Environmental Assessment and Outcomes – Water Quality

Table 13.2     Summary of Environmental Assessment and Outcomes – Marine Ecology

Table 13.3     Summary of Environmental Assessment and Outcomes – Fisheries

Table 13.4     Summary of Environmental Assessment and Outcomes – Waste

Table 13.5     Summary of Environmental Assessment and Outcomes – Visual Impact

Table 13.6     Summary of Environmental Assessment and Outcomes – Air Quality

Table 13.7     Summary of Environmental Assessment and Outcomes – Noise

Table 13.8     Summary of Environmental Assessment and Outcomes – Cultural Heritage

Table 13.9     Key Assessment Assumptions, Limitation of Assessment Methodologies and related Prior Agreement(s) with the Relevant Authorities

Table 13.10   Summary of Environmental Benefits and Dis-benefits of the Development Options and Alternative Mitigation Measures Considered for the Project