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WEN CHUAN EARTHQUAKE RECOVERY PROJECT Cheng County Moba Gorge Water Source Project in Gansu Province Public Disclosure Authorized Environmental Impact Assessment Public Disclosure Authorized Public Disclosure Authorized Moba Gorge Water Source Engineering Construction Management Department of Cheng County Lanzhou University Public Disclosure Authorized May 2012 1 Content 1 General Instructions ........................................................................................................................... 5 1.1 Project Background .................................................................................................................. 5 1.2 Evaluation Basis ....................................................................................................................... 6 1.3 Assessment Aim, Principles and Keys .................................................................................... 9 1.4 Functional Division of Assessment Area ............................................................................... 10 1.5 Assessment Time Intervals and Factors................................................................................ 11 1.6 Assessment Rating and Scope .............................................................................................. 11 1.7 Environmental Protection Goal .............................................................................................. 12 1.8 Assessment Standards .......................................................................................................... 13 2 regional environment overview 2.1 General Situation of Natural Environment ............................................................................. 18 2.3 General Situation of Environmental Quality ........................................................................... 21 3 Project Profile ................................................................................................................................... 40 3.1 Project Profile Summary ........................................................................................................ 40 3.2 General Situation of River Basin ............................................................................................ 40 3.3 Project Tasks, Scale and Operation Methods ....................................................................... 40 3.4 Project Arrangement and Constructions ................................................................................ 41 3.5 Construction Arrangement ..................................................................................................... 43 3.6 Submerging Area and Migration Arrangement ...................................................................... 49 3.7 Engineering Feature List ........................................................................................................ 50 3.8 Comparison with Original Project .......................................................................................... 54 4 Project Analysis ................................................................................................................................ 56 4.1 Selection of the Dam Site Plan .............................................................................................. 56 4.2 Conformity Analysis of Project Site and Planning ................................................................. 57 4.3 Relation with the Newly Built Water Factory .......................................................................... 59 4.4 Project Pollutant Source, Pollutant Discharge and Environmental Impact Analysis ............. 59 5 Environment Impact Prediction and Assessment ............................................................................ 73 5.1 Hydrology and Mud Sand Prediction and Assessment ......................................................... 73 2 5.2 Local Climate Impact Assessment ......................................................................................... 73 5.3 Prediction and Assessment of Water Environment Impact .................................................. 74 5.4 Environmental Geological Impact Assessment ..................................................................... 77 5.5 Air Environment Impact Assessment ..................................................................................... 78 5.6 Prediction and Assessment of Acoustic Environment Impact ............................................... 80 5.7 Solid Waste Environment Impact Assessment ...................................................................... 82 5.8 Impact on Human Health ....................................................................................................... 82 5.9 Social Economic Impact Assessment .................................................................................... 82 5.10 Landscape Environment Impact Assessment ..................................................................... 83 5.11 Ecological Environment Impact Assessment ....................................................................... 83 5.12 Reservoir Migration Impact Assessment ............................................................................. 83 6 Soil and Water Conservation ........................................................................................................... 86 6.1 Status of Water Loss and Soil Erosion and Soil and Water Conservation ............................ 86 6.2 Analysis of Water loss and soil erosion ................................................................................. 96 6.3 Preventive measures for water loss and soil erosion .......................................................... 102 6.4 Monitoring for Soil and Water Conservation ........................................................................ 107 6.5 Budget estimate for investing soil and water conservation project ..................................... 111 6.6 Comprehensive Analysis ..................................................................................................... 111 7 Environmental Protection Measure ................................................................................................ 112 7.1 Protective Measures for Water Environment ....................................................................... 112 7.2 Protective measures for atmospheric environment ............................................................. 115 7.3 Disposal measures for solid wastes .................................................................................... 116 7.4 Noise control measures ....................................................................................................... 117 7.5 Protective measures for environmental geological hazard .................................................. 117 7.6 Protective measures for landscape ..................................................................................... 118 7.7 Protective measures for ecological environment ................................................................. 118 8 Environmental Monitoring and Management ................................................................................. 120 8.1 Environmental monitoring task............................................................................................. 120 8.2 Environmental management ................................................................................................ 122 3 8.4 Partition for water source protection area ............................................................................ 130 8.5 “Three Simultaneity” Acceptance for environmental protection facility ............................... 131 9 Investment Estimate for Environmental Protection and Economic Profit and Loss of Environmental Influence ............................................................................................................................................ 133 9.1 Investment Estimate for Environmental Protection .............................................................. 133 9.2 Economic Profit and Loss of Environmental Influence ........................................................ 136 10 Environmental Risk Analysis ........................................................................................................ 138 10.1 Identification for Environmental Risk Source ..................................................................... 138 10.3 Cause Analysis for Environmental Risk ............................................................................. 139 10.4 Consequence Analysis of Environmental Risk .................................................................. 141 10.5 Management Measures for Environmental Risk ................................................................ 142 10.6 Emergency Arranged Plan ................................................................................................. 143 11 Public Participation ....................................................................................................................... 147 11.1 Significance and Purpose of Public Participation .............................................................. 147 11.2 The First Public Participation ............................................................................................. 147 11.3 The Second Public Participation ........................................................................................ 164 12 Conclusion and Suggestion ........................................................................................................