广西来宾水环境综合治理项目 - documents & reports...

Guangxi Laibin Water Environment Project

Consolidated Environmental Impact Assessment Report

Compiled by: Environmental Protection Research Academy of Guangxi

Certificate No.: National Environmental Assessment Certificate Class A No. 2902

Date: October 23, 2012

Contents

- 1 -1 General Introduction

- 1 -1.1 Project Background

- 3 -1.2 Overview of Consolidated Environmental Assessment Report

- 5 -1.3 Scopes and Periods of Environmental Assessment and Objectives of Environmental Protection

- 8 -1.4 Environmental Impact Factors and Assessment Factors

- 8 -1.4.1 Identification of Impact Factors

- 7 -2 Policy, Law and Administrative Management Framework

- 7 -2.1 Environmental Policies and Regulations

- 11 -2.2 Environmental Management Agencies and Responsibilities

- 13 -3 Project Description and Analysis

- 13 -3.1 Project Name and Components

- 15 -3.2 Location and Land Acquisition for the Proposed Project (Sites)

- 15 -3.3 Project Construction Schemes

- 24 -3.4 Due Diligence and Linkage Projects

- 26 -3.5 Investment Estimates

- 28 -3.6 Construction Organization and Design

- 34 -4 Project Area Environmental and Social Status

- 34 -4.1 Project Area Natural and Social Environment

- 40 -4.2 Current Status of Flood Control and Drainage

- 41 -4.3 Current Status of Flood Control Dike and Slope Protection

- 41 -4.4 Current Status of Water Drainage

- 43 -4.5 Main Targets of Environmental Protection

- 45 -5 Survey and Assessment on Current Status of Environmental Quality

- 45 -5.1 Survey and Assessment on Current Status of Air Environment Quality

- 49 -5.2 Survey and Assessment on Current Status of Water Environment Quality

- 59 -5.3 Survey and Assessment on Current Status of Acoustic Environment

- 61 -5.4 Survey and Assessment on Sediment

- 63 -5.5 Survey and Assessment on Current Status of Ecological Environment

- 64 -6 Environment Impact Assessment

- 64 -6.1 Environmental Impact Analysis during Construction Period

- 81 -6.2 Environmental Impact Analysis during Operation Period

- 83 -7 Comparison and Analysis of Alternative Schemes

- 83 -7.1 Content and Principles of Comparison and Analysis

- 83 -7.2 Analysis on Non-project Scheme

- 84 -7.3 Comparative Analysis on the Site Selection of Flood Control Dike

- 89 -7.4 Comparison and Selection of Design Plans for Slope Protection and Revetment

- 92 -7.5 Comparison and Selection of Storage Dam

- 95 -8 Analysis on Benefits and Losses of Environment and Economy

- 95 -8.1 Analysis on Development Objective and Overall Impacts of the Project

- 95 -8.2 Expected Benefits of the Project

- 97 -8.3 Environmental Benefits

- 98 -8.4 Social Benefits

- 99 -8.5 Economic Benefits

- 100 -8.6 Conclusions

- 102 -9 Environmental Impacts of Project Construction and Mitigation Measures

- 102 -9.1 Mitigation Measures during the Construction Period

- 107 -9.2 Mitigation Measures during Operation Period

- 110 -10 Resettlement and Social Impacts

- 110 -10.1 General Situation

- 110 -10.2 Project Impacts

- 110 -Table 10.21 Summary of the Project Impacts

- 111 -Table10.2-2 Summary of Affected Population

- 112 -Table 10.2-3 Summary of Permanent Acquisition of Collective Land

- 116 -10.3 Production and Livelihood Restoration Programs for APs

- 117 -1.Direct cash compensation

- 117 -3.Resettlement in commercial properties

- 118 -4.Living subsidy

- 122 -10.4 Institutional Arrangement

- 122 -Figure10.41 Resettlement Organizational Structure of the Project

- 122 -10.5 Resttlement Budget and Financing Sources

- 125 -11 Public Participation and Information Disclosure

- 125 -11.1 Purposes and Scopes

- 125 -11.2 Arrangement and Methods

- 126 -11.3 Information Disclosure

- 128 -11.4 Public Participation Survey Results and Discussions

- 135 -12 Environmental Assessment Conclusions

Attached Maps

Map 1 Distribution Map of Project Components

Map 2 Distribution Map of Sewage Pipeline Network for the Project

Map 3 Distribution Map of Surrounding Environmental Sensitive Points

Map 4 Distribution Map of Surrounding Environmental Sensitive Points for Pipeline Network

Map 5 Distribution Map of Environment Monitoring Sites

Annex

Annex 1 Environmental Specifications for Construction

1 General Introduction

1.1 Project Background

Laibin city was approved by the State Council as a prefecture-level city in December 2002, and it has administrative jurisdiction over one city and four counties. Located between the east longitude 10824~11028 and the north latitude 2316~2429, and with the east-west transverse distance of 202.1km and the north-south longitudinal distance of 134.3km, Laibin City covers an area of 13,400 km2. Located on the connecting area between the provinces in southwest and central China and the southern coast of China, it borders Liuzhou, Guilin and Hechi city in the north, Wuzhou, Guilin and Guigang city in the east, Hechi and Nanning city in the west and Guigang and Nanning city in the south. Its population was 2.5 million in 2010. Since it became a prefecture-level city in 2002, its urban population increased to 270,000 from 120,000, and its urban area increased to 29km2 from 18km2, showing very fast development.

However, there is not yet effective flood control and drainage system and non-structural measures in the main urban areas of Laibin city. Frequent flood disasters have caused great impacts on local economic and social development and peoples living. There were 36 recorded flood disasters over the 916 years from 996 to 1911. Eight years suffered from flood disasters over the 38 years from 1912 to 1949. After the founding of Peoples Repulic of China in 1949, Laibin main urban area suffered from flood disaster in 1988 and 1994. Within the 17 hours from 20:00 on May 31 to 13:00 on June 1, 2010, the precipitation in Laibin urban area was 439mm (the recorded maximum 24-hour precipitation was 311mm before 2010). 9.45km2 of urban areas were flooded, accounting for 32% of total built-up area. 11,000 houses were flooded and 51,000 people were affected. 23 streets suffered from waterlogging of 0.3m to 1.5m. Waterlogging caused RMB 150 million direct economic losses.

After the issue of the Decision of the CPC Central Committee and the State Council to Speed up Water Conservancy Reform and Development (No. 1 document of the year) in 2011, the central government held the work conference on water conservancy on July 8~9, 2011. It was highlighted on the conference that it is the urgent need to speed up water conservancy reform and development, for it not only helps to transform the pattern of economic development, build a conservation-oriented and environment-friendly society, protect and improve people's livelihood, promote social harmony and stability, but also helps to address global climate change and to prevent natural disasters.

The flood control system for the main urban area has not been well established in Laibin city. Parts of the embankment height along the south and north banks of Hongshui River and the east bank of Beizhijiang River can not withstand the flood of one in ten years. The sluice gates (pump stations) for flood control and drainage purpose have not been built at the mouths of the inland rivers such as Caoxiegou Canal and Shizheng Canal. The existing flood drainage pipeline network on the old urban area was built in the 1980s. Without scientific planning at the time, it was built according to a low standard featuring narrow pipeline, mixed flow of storm water and sewage. It even depends on natural karst caves or underground rivers drainage for gravity drainage of flood in some areas. In a word, the existing flood drainage pipeline network lags far behind the demand for urban development and it proves to be very vulnerable in withstand flood hazards. Frequent and serious flood hazard in its main urban area has become a serious threat for Laibin city since it became a profecture-level city 10 years ago. The urban area is very likely to suffer from waterlogging in case of heavy rainfall in a short term. Short-term heavy rainfall often causes serious flood in the urban area and results in great losses. With rapid economic development and its urban development, the Laibin urban area is playing increasingly important roles. A same degree of flood can cause even greater losses. It becomes urgent needs to improve the capacity of the urban area for flood control and drainage.

The project is a very important infrastructure project for Laibin city to maintain social stability, protect peoples life and properties and protect its economic achievements. The CPC Laibin committee and the municipal government decide to take this opportunity to address the flood hazards in the urban area and to improve the comprehensive flood control capacity for its inland rivers in a fundamental way. The project construction conforms to the fundamental interests of the urban residents.

To improve the flood control and drainage capacity and enhance the management of stormwater in its urban area, Laibin municipal government decides to apply the loans from the World Bank to fund the construction of Guangxi Laibin Water Environment Project. In this report, the project investment is estimated as RMB 790.15 million (incl. RMB 80 million of compensations for land acquisition, house demolition and resettlement), including RMB 490.4678 million for the construction and installation costs. Based on its construction plan, this project will be jointly funded by the World Bank and Laibin municipal government. It is planned to apply for USD 80 million from the World Bank, and the remaining will be raised and funded by Laibin municipal government.

The construction contents for this project include building or upgrading dikes for Hongshui River, Beizhijiang River and Longdong River and Class II flood control dam on Caoxiegou Canal; building flood control sluice gates and drainage pump stations on Caoxiegou Canal, Shizheng Canal, Modong Canal, Shuiyun Canal, Xiangyang Road and Longdong River; building check gates on Laihua Canal and Caoxiegou Canal; Caoxiegou Canal ecological rehabilitation; building stormwater and sewage pipeline network on the old urban area.

The Water Environment Integrated Treatment Plan for Jiangbei (North Bank of Hongshui River) Central Urban Area of Laibin City will be implemented with the construction of Guangxi Laibin Water Environment Project. The construction of flood control sluice gates, drainage pump stations and flood control dikes will help to improve the flood control and drainage capacity of the urban areas, reduce losses of flood and waterlogging disasters, protect the safety of peoples lives and properties and promote the harmonious and sound social development. The sewage interception and rehabilitation of original water system will improve the self-purification capacity of water body. This project will help improve water quality of the rivercourse, rehabilitate the rivercourse ecological environment, improve the functions of water system and carrying capacity of water environment. It will also improve the living environment, investment environment, competitiveness and image of the city and it is good for the coordinated development between the environment and society and economy. After the treatment, the living environment and the ecological environment of the city will be greatly improved. The project construction will create a beautiful and ecologically harmonious water-front landscape belt with rich local ethnic characteristics. As a basis of sustainable living environment in the city, it is very good for the sustainable development of Laibin City. The development strategy implemented by Laibin City is to build itself into a city with good environment, developed industries, sound urban construction, stable agricultural development, and prosperous commerce and trade. This project construction will create favorable conditions for the implementation of this development strategy.

1.2 Overview of Consolidated Environmental Assessment Report

1.2.1 Purpose of Environmental Assessment

Based on the provisions of the Environmental Impact Assessment Law of Peoples Republic of China, the Regulations on the Administration of Construction Project Environmental Protection and the Circular on Enhancing Environmental Impact Assessment Management for Construction Projects Funded with Loans from International Financial Institutions and the safeguard policies of the World Bank, as well as the related environmental impact assessment procedures of China and the World Bank, it is required to assess the positive environmental impacts of project construction, to identify, screen, predict and analyze the potential negative environmental impacts, to propose specific and effective mitigation measures for inevitablely negative environmental impacts and environmental management plan. It will provide evidence for the World Bank to carry out independent assessment for this project and offer reference for related government departments and the environmental management departments to make decision and adminstrate.

1.2.2 Categories and Ratings of Consolidated Environmental Assessment

According to the provisions of the Circular on Enhancing Environmental Impact Assessment Management for Construction Projects Funded with Loans from International Financial Institutions (Environmental Monitoring Document Ref. No.: [1993]324) and the World Bank operational manual 4.01 Environmental Assessment, and taking into consideration of the indentification and screening results of the environmental assessment factors, the environmental assessment of this project is classified as Category B, which has potential negative environmental impacts, but the impacts are less than those of Category A project.

Therefore, the consolidated environmental assessment report (CEA) is prepared according to the contents and scopes of a Category B project. The grades of environmental impact assessment for this project are listed in Table 1.2-1.

The grades of environmental impact assessment for this project are identified on the basis of following technical guidelines:

(1) Guidelines for Environmental Impact Assessment Atmospheric Environment (HJ/T2.2-2008)

(2) Guidelines for Environmental Impact Assessment Surface Water Environment (HJ/T2.3-93)

(3) Guidelines for Environmental Impact Assessment Acoustic Environment (HJ/T2.4-2009)

(4) Guidelines for Environmental Impact Assessment Non-polluted Ecological Impact (HJ/T19-2011)

Table 1.2-1: Grades of Environmental Impact Assessment

Serial No.

Category

Construction Contents

Atmospheric Environment

Surface Water Environment

Acoustic Environment

Non-polluted Ecological Environment

1

Flood control dikes and slope protection

Flood control dikes and slope protection for Hongshui River, Beizhijiang River and Longdong River

Grade III

Grade III

Grade III

Grade III

2

Rivercourse treatment

Caoxiegou ecological rehabilitation and Class II flood control dam

Grade III

Grade III

Grade III

Grade III

3

Stormwater and sewage pipeline network

Sewage interception network along Caoxiegou Canal, stormwater and sewage pipeline network on the old urban area

Grade III

Grade III

Brief analysis

Brief analysis

4

Road rehabilitation

Rehabilitation of Heshan Road and Xinxing Road

Grade III

Brief analysis

Grade II

Brief analysis

5

Drainage sluice gates and pump stations

Flood control sluice gates and drainage pump stations on Caoxiegou Canal, Shizheng Canal, Modong Canal, Shuiyun Canal, Xiangyang Road and Longdong River, and check gates on Laihua Canal and Caoxiegou Canal

Grade III

Brief analysis

Grade II

Brief analysis

Notes: Based on the identification results of environmental impact and the provisions of the guidelines for environmental impact assessment, a brief analysis is required if the assessment grade is lower than Grade III, and no quantitative forecast is required.

As shown in the Table 1.2-1, the assessment grades for individual environmental elements such as atmospheric environment, surface water environment, acoustic environment and non-polluted ecological environment are classified as Grade III or brief analysis based on the engineering characteristics and impact identification of different sub-projects and related technical guidelines for environmental impact assessment in China. However, this project as a whole includes many different construction contents and covers a wide area. It is likely to have some negative environmental impacts, and some impacts may affect an area broader than the sites or facilities subject to physical works. Therefore, this project as a whole is classified as Category B in this consolidated environmental assessment report.

1.2.3 Preparation of Consolidated Environmental Assessment

After related procedures such as project survey and capability assessment etc., Laibin Guizhong Water City Development and Investment Co., Ltd. commissioned Environmental Protection Research Academy of Guangxi (hereinafter short for Guangxi Environmental Protection Academy) to prepare the consolidated environmental assessment report (hereinafter short for CEA) for Guangxi Laibin Water Environment Project.

After being commissioned, the assessment agency collected and analyzed related information, visited the proposed construction sites and their surrounding environment, and carried out initial analyses on the characteristics, contents, scales and techniques of the construction contents, main pollution factors and potential environmental impacts. It then prepared the consolidated environmental assessment report based on the specific provisions of technical guidelines for environmental assessment of China and the safeguard policies of the World Bank.

1.2.4 Components and Compiler of Environmental Assessment Report

This project is located in the Xingbin district of Laibin city. The project components include construction of flood control dikes, drainage sluice gates and pump stations, rivercourse treatment, laying stormwater and sewage pipeline network. This CEA report carries out comprehensive analyses and assessments on the project based on the provisions of technical guidelines for environmental assessment of China and the safeguard policies of the World Bank. It aims to answer the following questions:

1) The project characteristics of this project and potential environmental issues;

2) Feasibility of site selection for this project and main environmental protection objectives (sensitive Points);

3) Potential positive environmental benefits and negative environmental impacts of this project;

4) Mitigations measures for potential environmental impacts of this project;

5) Analysis on alternative schemes;

6) Environmental management plan (EMP).

Besides this CEA report, the following report is also prepared by Guangxi Environmental Protection Academy:

Environmental management plan: The consolidated EMP is prepared on the basis of the EMP of separate subprojects and covers environmental impact, mitigation measures, environmental monitoring plan, organizations, capacity building and cost estimates.

1.3 Scopes and Periods of Environmental Assessment and Objectives of Environmental Protection

1.3.1 Scopes of Environmental Assessment

The scopes of the comprehensive environmental assessment include:

(1) The assessment scopes of different subprojects are identified as the basic assessment scopes of this comprehensive environmental assessment based on the requirements of guidelines for environmental impact assessment and the identified grade of environmental assessment.

(2) Should there be any, the environmental protection sites (sensitive Points) or focused targets of the World Bank safeguard policies will be included in the assessment scopes.

(3) Any environmental elements and items that are directly related to this project or have potential environmental impacts (such as collecting the sewage into the Chengdong Wastewater Treatment Plant, transporting the solid waste to the landfill, and resettlement area) are also included in the assessment scopes.

The scopes of environmental assessment of different subprojects are listed in Table 1.3-1.

Table 1.3-1 Scopes of Environmental Assessment for Different Project Components

Serial No.

Category

Scopes of Environmental Assessment

Atmospheric Environment

Surface water

Underground water

Acoustic environment

Non-polluted Ecological Environment

1


100m within range of both banks of flood control dikes

To be determined by the project characteristics and the environmental functions of the receiving waterbody

The same underground water tectonic unit of the proposed construction site



2


100m within range of both riverbanks





3


100m within range of pipelines





4

Road rehabilitation

100m within range of upgraded roads





5

Drainage sluice gates, pump stations and check gates

100m within range of drainage sluice gates and pump stations

To be determined by the project chatacteristics and the environmental functions of the receiving waterbody




6

Resettlement Sites

1km within range of proposed construction sites



100mwithin range of proposed construction sites

200m within range of proposed construction sites

Notes:

(1) Should there be any, the environmental protection sites (sensitive Points) or focused targets of the World Bank safeguard policies will be included in the assessment scopes.

(2) Any environmental elements and items that are directly related to this project or have potential environmental impacts (such as the dam in the upper or lower reaches of the river, underground water, material and cultural resources with historical values) are also included in the assessment scopes.

(3) Similar linkage projects that are built at the same time or may have potential environmental impacts can be considered to included in the scopes.

(4) HJ/T2.2-2008 Guidelines for Environmental Impact Assessment Atmospheric Environment

(5) HJ/T2.4-2009 Guidelines for Environmental Impact Assessment Acoustic Environment

(6) HJ/T19-2011 Guidelines for Environmental Impact Assessment Non-polluted Ecological Impact

1.3.2 Environmental Assessment Period

This consolidated report carries out environmental assessment during the construction and operation periods of the project.

1.3.3 Environmental Protection Targets (Sensitive Points)

Based on the provisions of the laws and regulations on environmental impact assessment in China and the World Bank safeguard policies, the environmental protection objectives (Sensitive Points) of environmental assessment include:

(1) Specially preserved areas: areas regulated and planned by the national government or approved by the peoples government of the county or the above level, as the areas requiring special preservations, i.e. drinking water source protection areas, natural reservation areas, scenery resorts, ecological functions protection areas, essential farmland reservation areas, key water and soil loss prevention and control areas, forest parks, geological parks, the world heritage sites, and important cultural relic reservations.

(2) Ecological sensitive areas: areas suffered from severe water shortage; habitats of rare plants, animals, and aquatic organisms; spawning grounds of fish or shrimps, important wetlands, natural fishing grounds, etc.

(3) Social concerned areas: densely populated areas, cultural and educational districts, office areas of departments of CPC and the government, recuperation resorts, hospitals, etc.

(4) Material and cultural resources, including the existing ones, such as: distinct cultural relics, temples with historic and cultural values, local representative residential houses, ancestral temples, ancient tombs, religious historic sites, cultural relics, ancient trees, etc.

(5) Indigenous People and involuntary resettlement.

Based on the field surveys by the environmental assessment agency, the environmental protection targets of this project mainly include social concerned areas and involuntary resettlement, but do not involve the specially preserved areas, ecological sensitive areas and material and cultural resources. Based on the identification and screening results of the environmental protection targets (sensitive points) is illustrated in Chapter 4 (Project Area Environment Status).

1.4 Environmental Impact Factors and Assessment Factors

1.4.1 Identification of Impact Factors

The implementation of the project will help improve flood control capacity of urban area, reduce losses of flood disasters, improve water quality of rivercourse and self-purification of the water body. Meanwhile, implementation of the project will induce some negative environmental impacts to the eco-environment and the environmental quality. Generally, the project would not cause negative impacts during the design period, as jobs conducted in this phase include mainly site selection, comparison of technical alternatives, and feasibility study etc.

Since this project contains different categories of components, the impacts of different components include common environmental impacts and unique impacts of individual components.

Common environmental impacts include fugitive dust during the transportation and loading of materials, excavation and filling of earthwork and transit of vehicles, exhaust of construction machinery and vehicles; oil leaking from construction machines and domestic wastewater of the construction staff may induce pollution to the nearby water bodies; noise of the machineries will also interfere the normal work and life of the local residents nearby; and the frequently shuttling engineering vehicles will break the existing traffic order; land occupation caused by the project will decrease the quantity of local cultivated land and the coverage of vegetation, change the way of land use, and induce the influence to local agricultural ecology. In the process of implementation, vegetation of the proposed sites will be destroyed; water and soil loss might be easily broken out because of not being able to take sufficient protection measures for massive excavation and backfilling of the road works, and for temporary stacking of the excavated earth/gravels during construction.

The environmental impacts of individual components are listed in Table 1.4-1.

Table 1.4-1 Environmental Impacts of Individual Components

Serial No.

Project Components

Individual Environmental Impacts

1


Construction sewage and oily sewage discharged from construction machinery will cause pollution to the rivers.

Dangerous materials and spoils can be flushed into the water body by rainwater if they are stored or piled near the river.

2


Sludge and waste dredged from the rivercourse can be flushed into the water body by rainwater if they are reasonably stored.

The odor emissioned from the river dredging and transportation of sludge will pose impacts on surrounding environment.

3


Road excavation will pose impacts on traffic flow and transportation for residents living nearby;

Road excavation will cause noise and vibration for surrounding environmental sensitive points such as school, kindergarten and hospital.

4

Road rehabilitation

Road excavation will pose impacts on traffic flow and transportation for residents living nearby;

Road excavation will cause noise and vibration for surrounding environmental sensitive points such as school, kindergarten and hospital.

5


Noise from operations of machinery equipment and pumps

In general, the main impact factors of the project in construction and operation periods are as follows:

(1) Social environment: land occupation, demolition, resettlement, traffic of roads, and city appearance and landscapes, etc;

(2) Eco-environment: change of land use, vegetation damages, soil and water loss, and impact on aquatic organisms caused by dredging, etc;

(3) water environment: domestic waste water and surface runoff on the road in the construction period; and industrial and domestic wastewater generated in the operation period;

(4) Acoustic environment: noise of traffic and machineries, etc;

(5) Ambient air: fugitive dust from construction and tail gas emitted by transportation vehicles in the construction period;

1.4.2 Screening of Environmental Impact and Assessment Factors

Based on the above analysis, a matrix of environmental impact identification was set up, taking consideration of the engineering types and features of the project, which is shown in Table 1.4-1.

Table 1.4-1 Matrix for Identification of Environmental Impacts

Period

Construction Activities

Impact Factor

Natural Environment

Eco-environment

Social Environment

Atmosphere

Water body

Acoustic

Land use

Water & soil conservation

Plant

Animal

Landscape

Employment

Peoples income

Local economy

life quality

Tourism

Construction Period

Selection of construction site

-S

-S

-S

-L

-M

-L

-S

-L

+S

+S

+S

-S

-S

Materials conveyance

-S

-S

-S

-S

-L

-L

-S

-L

+S

+S

+S

-S

-S

Site cleaning

-S

-S

-M

-S

-M

-L

-M

-L

+S

+S

+S

-S

-S

Engineering construction

-L

-S

-L

-M

-L

-L

-S

-L

+S

+S

+S

-S

-S

Operation Period

Transportation

-S

-M

-M

-S

-M

M

-M

-S

+M

+M

+M

+M

+L

Facilities operation

+S

+M

-S

-S

+S

+S

+S

+M

+M

+M

+M

+M

+L

Notes: S indicates light impact; M indicates medium impact; L indicates large impact; + indicates positive impact; - indicates negative impact.

Results of identification of the impact factors for the subcomponents are shown in Table 1.4-2.

On the basis of environmental impact identification, the assessment factors for different types of subcomponents were screened out, which is shown in Table 1.4-3.

Principles for screening of the environmental assessment factors are as follows:

A. Routine pollutant factors;

B. Factors may cause major impact to the environment, and typically featuring the subcomponents; and

C. Factors with the limit value defined specifically in national environmental standards.

Table 1.4-2 Results of Identification of the Impact Factors

Actions May Cause Impact on Environmental Resources and Value

Possible Damages or Benefits to Natural/Social Environment

Basis for Impact Analysis

Typical Mitigation Measures

Identification of Potential Impact Factors




Road rehabilitation


1. Location (Site Selection) Related Environmental Issues

Impact on production system (e.g. agriculture)

Loss of production capacity

Land area occupied;

Type of production / income of per ha. of land

Change of project location (reselection of site);

Compensation measure

Impact on transportation

Change of roads in the field or residential areas

Description of roads (width, length);

Area and service population

Change of project location;

Rehabilitation or alternative solution for transportation

Damage of the existing construction

Loss of private building

Type, quantity, value;

Resettlement population


Proper settling of the involved population

Loss of infrastructure

Type, characteristic and estimated value


Compensation or alternative solution

Damage of the ecological area

Damage of vegetation

Vegetation area / species of plants;

Value (economic and ecological)

Change of project vegetation

Damage of biodiversity

List of species

Special area


Reduce of land occupation

Impact on reserves: national parks and nature reserves

Type and purpose of preservation;

Total area; Impacted area


Reduction of land occupation

Impacts on surface water environment and risk of flood disaster

Hydrological parameters,

Monitoring data of the water quality


Change of location of the drainage outlet

Damage to historical cultural relics (e.g. ancient tombs, historical site, etc.)

Cultural loss

Description of historical culture (type, quantity, location)

Change of project location

Damage to drainage canals/channels

Flood, acidification of soil

Major ways of drainage or alignments of canals /channels (pipelines)


Attention should be paid to protection of the canals /channels during construction.

Manmade infrastructures in the outdoor scenery spots (scale and area)

Damages of the natural scenery and tourism values

Damages to the values of the sceneries


Optimized design for protection of the scenery resort

2. Potential Environmental Issues during Construction Period

Temporary land occupation for camps and storage sites, etc.

Impact on land use and production

Area, utilization purpose and location of the occupied land

Reduction of land occupation, definition of the contractors obligations;

Monitoring and supervision of the construction activities

Elimination of vegetation

Damages of woodland, fruit garden and cultivated land

Type/area of the damaged vegetation;

Economic value

Way of elimination and monitoring of the elimination activities;

Area division

Easier access to the natural areas

Risk of poaching

Location of the sensitive areas;

Threatened areas or species

Contractors obligation;

Management and monitoring of the construction staff

Wastes produced by civil engineering works

Soil erosion and loss of aggregated substances

Location of earthwork excavation, and those for the backfilling and disposal of the excavated materials;

Natural drainage method

Contractors obligation (drainage and sedimentation tank);

Monitoring

Temporary occupation or damage

Location, area, and purpose of land occupation

Contractors are obliged to prepare a Management Plan for Potential

Damages and Temporary Land Occupation.

Emission of fugitive dust and other particulates

Location and distance of the residential area,

Wind direction;

Engineering Construction implementation schedule

Contractors obligations (spraying of water);

Monitoring of the civil engineering activities

Dredging of the river course

During the process of dredging and disposal, the aggregated substances in the bottom mud will release certain pollutants, which may pollute the environment if not being disposed improperly.

Sampling analysis of the aggregated substances and its results;

Quantity of silts to be dredged

Dredging method;

Disposal conditions (stacking or disposal), monitoring

Transportation of construction materials and engineering equipments

Particulates and noise;

Safety of transportation

Volume of materials, transportation quantity;

Transportation method for passing through the environmental sensitive areas

Contractors obligations: maintenance of vehicles and road signs,

and monitoring of the transportation method

Employment of construction staff

Employment of the local labours will bring direct benefit to the local residents and the ethnic people

Estimated amount of the employees

Contractors obligations (to be put into effect in the

EMP);

Monitoring

Impact on hygiene and health safety of the construction staff and local residents

The amount of the potentially involved population;

Health statistics (incidence rate of disease);

Status of local infectious and epidemic diseases

Contractors obligation: hygiene and health safety management

Monitoring

Pollution to the nearby surface water body caused by the domestic wastewater discharged

Surface water quality, environmental quality standards, discharge standards;

Water conservancy facilities at lower reach of the river

Contractors obligation: management of hygiene and health safety and wastes

Monitoring

Use of large-scale construction equipments

Impacts on local residents caused by noise and exhaust gas

Necessary construction equipments,

Construction task plan;

Distance to the nearest residential area and population density of the area;

Wind direction and speed

Emission standards for noise and exhaust gas

Large-scale equipments are prohibited to work during nighttimes;

Local residents should be noticed about the working time of construction;

Contractors obligations;

Monitoring

Solid wastes generated

Pollution to the soil, river and the water bearing layer of the groundwater

Type and quantity of the solid wastes: domestic wastes, construction wastes, surplus soils, chemical wastes

Solid waste management and disposal plan;

Contractors obligations;

Monitoring

3. Potential Environmental Issues during Operation Period

Improvement of the drainage system

Waterlogging or river pollution induced by irrational drainage arrangements

Water consumption estimation,

Confirmation of the waste water discharge outlets

Incorporated with water supply and

Sanitation facilities, if necessary

Operation of sewerage networks and wastewater pump stations

Odours and noise

Location of the pumping station/odour emission source;

Distance to the residential area;

Standards for noise;

Emission standards for offensive odours

Purchase of low noise equipments, and strengthening the maintenance;

Monitoring

Reducing risks of flood disaster

Enhance the safety of the public and the area

The public in the protection area and their activities

Flood level control, adoption of adequate flood-control standards;

Monitoring

Increase of the peak flow of the flood at lower section of the river

Parameters of flood

Risk of dam landslip

The newly developed urban area and cultivated land may be suffered from floods.

Parameters of the dam (height of the dam, storage volume, etc.);

the public in the protection area and their activities

Dam safety shall be considered in the design;

Monitoring

Change of land value

Land value change caused by the project

Present land value of the flooding area and the protection area

Reduction of land occupation, and compensation upon necessity

Table 1.4-3 Screening Results of the Environmental Assessment Factor

Environmental Assessment Factor

Possible Levels of Impact

Eco-environment

Ambient Air

Surface Water

Ground Water

Acoustic Environment

Solid Waste

Construction Period

Operation Period

Land use, vegetation, natural habitat, water and soil erosion

TSP, odor

pH value, suspended matter, DO, CODMn,BOD, ammonia nitrogen, oil type, TN, TP, fecal coliform

/

Noise at boundary of the plant, construction noise

Construction spoil, surplus residual sludge

2 Policy, Law and Administrative Management Framework

2.1 Environmental Policies and Regulations

2.1.1 Overview

Based on the integrated analytical results in respect of project type and scale, selection of project sites, environmental sensitivity, and the characteristics and extent of the potential impacts, the following policy frameworks, regulations and standards will be mainly relied on in the process of environmental assessment:

(1) Environmental Protection Laws and Regulations;

(2) Pollution Control Technical Policy;

(3) Socio-Economic Development and Environmental Protection Plan;

(4) Urban Development Master Plan;

(5) Environmental Impact Evaluation Technical Guidelines and Norms;

(6) Environmental Quality Standards;

(7) Pollutant Discharge Standards;

(8) Safeguard Policies of the World Bank.

The above policies, regulations and standards form the framework of legal and policy documents for guiding and standardizing the environmental assessment of the project. Considering that the types and natures of each subcomponent are different, practical application of legal regulations, policies and standards for each subcomponent can be varied.

2.1.2 Laws and Regulations on Environmental Protection

(1) The Environmental Protection Law of the People's Republic of China (1989);

(2) The Law of the People's Republic of China on the Prevention and Control of Atmospheric Pollution (2000);

(3) The Law of the People's Republic of China on Prevention and Control of Water Pollution (2008);

(4) Law of the Peoples Republic of China on the Prevention of Environmental Noise Pollution (1996)

(5) Law of the Peoples Republic of China on Prevention and Control of Environmental Pollution Caused by Solid Waste (2004);

(6) Law of the Peoples Republic of China on Promoting Clean Production (2002);

(7) Law of the Peoples Republic of China on Environmental Impact Assessment (2003);

(8) Law of the Peoples Republic of China on Water and Soil Conservation (1991);

(9) Law of the Peoples Republic of China on Land Administration (revised in 1998);

(10) Law of the Peoples Republic of China on Urban and Town Master Plan (2008);

(11) The Water Law of the Peoples Republic of China (2002);

(12) The Flood Control Law of the Peoples Republic of China (1997);

(13) The Regulation on Protection of Basic Farmland, mandate No. 257 issued by the State Council of the Peoples Republic of China in 1998;

(14) The Management Regulation on Environmental Protection for Construction Projects, mandate No.253 issued by the State Council of the Peoples Republic of China in 1999;

(15) Catalogue of Construction Projects for Categorized Environmental Protection Management, mandate No. 14 issued by the National EPB in 2003;

(16) Technical Policy on the Prevention of Over-nutrition of Lakes and Reservoirs, Huanfa (2004) No. 59 issued by the National EPB;

(17) Implementing Regulations on Law of the Peoples Republic of China on Water and Soil Conservation (1993);

(18) The Safety Production Law of the Peoples Republic of China (2002);

(19) Interim Measures for Public Participation in the Process of Environmental Impact Assessment, Huanfa (2006) No.28, issued by the National EPB in 2006;

(20) A Decision Made by the State Council in 2005 on Putting the Concept of Scientific Development into Effect and Strengthening Environmental Protection, Guofa (2005) No. 39;

(21) National General Precautious Measures for Public Emergency Response (2006);

(22) Regulations on Rivercourse Management of the Peoples Republic of China (1988);

(23) Function Zoning of Surface Water in Guangxi Zhuang Autonomous Region (2002);

(24) The Regulation on the Environmental Protection of Guangxi Zhuang Autonomous Region (2006);

(25) The Regulation on the Agricultural Environmental Protection of Guangxi Zhuang Autonomous Region;

(26) Measures of Guangxi Zhuang Autonomous Region for Implementing the Law of the Peoples Republic of China on the Prevention of Environmental Noise Pollution (1993);

(27) The Circular of the State Council on Keystones in the Near Future for the Smooth Construction of Conservation-oriented Society (2005);

(28) A Bulletin on the Modification List of Pollutants Discharge Standard for Wastewater Treatment Plants in Towns, ( issued by the National EPB, No.21, 2006);

(29) Regulation on the Administration of Cultural Relics of Guangxi Zhuang Autonomous Region (2006);

2.1.3 Techniques and Policy on Pollution Prevention and Control

(1) The Technical Policy for Urban Domestic Sewage Treatment and Its Pollution Prevention and Control;

(2) The Opinions about Pushing forward Industrialization of Urban sewage and Garbage Disposal;

(3) The Inventory for Guiding the Industrial Restructuring (2012).

2.1.4 Socio-Economic Development and Environmental Protection Plan

The 12th Five-Year Plan of Laibin City for the National Socio-economic Development

2.1.5 Urban Master Plan

The Urban Master Plan of Laibin City (2008~2025).

2.1.6 Environmental Impact Evaluation Technical Guidelines and Norms

(1) HJ/T2.1-2011 Guidelines for Environmental Impact Assessment General Principles;

(2) HJ/T2.2-2008 Guidelines for Environmental Impact Assessment Atmospheric Environment;

(3) HJ/T2.3-93 Guidelines for Environmental Impact Assessment Surface Water Environment;

(4) HJ/T2.4-2009 Guidelines for Environmental Impact Assessment Acoustic Environment;

(5) HJ/T19-2011 Guidelines for Environmental Impact Assessment Non-Pollution Ecological Impact;

(6) HJ/T88-2003 Guidelines for Environmental Impact Assessment Water Conservancy and Hydropower Projects;

(7) HJ/T169-2004 Guidelines for Environmental Risk Assessment on Construction Projects;

(8) HJ/T192-2006 Technical Criterion for Eco-environmental Status Assessment ( On Trial );

(9) GB50433-2008 Technical Specifications for Schemes of Water and Soil Conservation for Development of Construction Projects.

2.1.7 Environmental Quality Standards

(1) GB3095-1996 Ambient Air quality Standards;

(2) GB3838-2002 Environmental Quality Standards for Surface Water;

(3) GB3096-2008 Acoustic Environment Quality Standards;

(4) TJ36-79 Hygienic Standards for the Design of Industrial Enterprises (the Maximum Allowable Concentration of Hazardous Substance in the Atmosphere of Residential Areas)

Table 2.1-1 lists the environmental quality standards and assessment factors adopted in the environmental impact assessment.

2.1.8 Pollutant Discharge Standards

(1) GB16297-1996 Integrated Emission Standard of Air Pollutants;

(2) GB14554-93 Emission Standards for Odor Pollutants;

(3) GB8978-1996 Integrated Wastewater Discharge Standard;

(4) GB18918-2002 Standard for Pollutants Discharge from Urban Wastewater Treatment Plant;

(5) CJ3082-1999 Discharge Standard for Municipal Wastewater;

(6) GB12523-2011 Noise Limits for Construction Site;

(7) GB12348-2008 Emission Standard for Industrial Enterprises Noise at Boundary;

(8) GB18599-2001 Standard for Pollution Control on the Storage and Disposal Site for General Industrial Solid Waste.

(9) GB 5085.3-2007 Identification Standards for Hazardous Wastes Idetification for Extraction Toxicity.

Table 2.1-2 lists the pollutant discharge standards and assessment factors adopted in the environmental impact assessment.

Table 2.1-1 Environmental Quality Standards and Assessment Factors Used in Environmental Impact Assessment

Serial No.

Standards

Category/Class

Assessment factors

1

Ambient Air Quality Standard (GB3095-1996)

Class II

TSP, SO2,, NO2

2

Hygienic Standards for the Design of Industrial Enterprises (TJ36-79)

-

H2S, NH3

3

Environmental Quality Standards for Surface Water(GB3838-2002)

Class

pH, SS, DO, CODMn, BOD5, NH3-N, volatile phenol, total cyanide, As, Hg, Cd, petroleum, Cu, Zn, Fluoride, sulfide, TP, anionic surfactant, Se, fecal coliform

4

Acoustic Environment Quality Standards(GB3096-2008)

Class II

Equivalent sound level

Table 2.1-2 Pollutant Discharge Standards and Assessment Factors used in Environmental Impact Assessment

Serial No.

Standards

Category/Class

Assessment factors

1

Integrated Emission Standard of Air Pollutants (GB16297-1996)

Unorganized emissions

TSP

2

Emission Standards for Odor Pollutants (GB14554-93)

II

Odor

3

Integrated Wastewater Discharge Standard (GB8978-1996)

I, III

pH, SS, DO, BOD5, NH3-N, anionic surfactant

4

Emission Standard for Industrial Enterprises Noise at Boundary (GB12348-2008)

Category


5

Noise Limits for Construction Sites (GB12523-90)

-


2.1.9 Safeguard Policies of the World Bank

(1) OP/BP 4.01 Environmental Assessment;

(2) OP/BP 4.04 Natural Habitats;

(3) OP 4.09 Pest Management;

(4) OP 4.36 Forest;

(5) OP 4.37 Safety of Dams;

(6) OP 4.11 Physical Cultural Resources;

(7) OP/BP 4.12 Involuntary Resettlement;

(8) OP 4.10 Indigenous Peoples;

(9) OP 7.50 Projects on International Waterways;

(10) OP 7.60 Projects in Disputed Area.

This environmental assessment is based on the OP/BP 4.01 Environmental Assessment and the OP/BP 4.12 Involuntary Resettlement.

2.1.10 Relevant Project Documents

(1) The Feasibility Study Report on Guangxi Laibin Water Environment Project prepared by Shanghai Municipal Engineering Design Institute (Group) Co., Ltd.

(2) The Resettlement Plan of Guangxi Laibin Water Environment Project prepared by Hohai University.

2.2 Environmental Management Agencies and Responsibilities

China's Central People's Government and the people's governments of all provinces (municipalities directly under the Central Government, autonomous regions), municipalities (state) and counties (districts) shall establish the environmental management agencies in accordance with the law, and fulfill the corresponding environmental management responsibilities in accordance with the law. The environmental management agency related to this project is Laibin Environmental Protection Bureau.

Laibin Environmental Protection Bureau is responsible for environmental protection administration and administrative law enforcement of its whole region and its main responsibilities include: implementing the national environmental protection guidelines, policies, laws, regulations, administrative regulations and standards; drafting the Environmental Protection regulations and administrative regulations of the whole region and supervising their being implemented; evaluating environmental effects of important economic and technical policies and development plans of Laibin, as well as important economic development plans authorized by Laibin municipal government; drawing up the environmental protection plan, organizing the preparation of pollution prevention and governance planning of drainage areas and ecological protection planning, and supervising their being implemented; taking charge of the supervision and management of ecological environment protection in the area under its jurisdiction and environmental protection of the construction project; organizing the relevant people to develop and supervise the implementation of the time-limited governing plans for pollution sources; enacting a controlling plan for Laibins pollutant emitting volume; taking charge of the enrollment of pollutant emission and managing pollutant emitting licenses; supervising the collection of pollutant emitting fees; taking charge of environmental supervision and administrative checks of environment protection; taking charge of the international economic and technical cooperation and communications about environment protection; conducting relative foreign environment protection affairs authorized by Laibin municipal government.

The pollution control section and supervision and management section established under Laibin Environmental Protection Bureau shall be exclusively responsible for the administrative management of EIA and its main responsibilities include: taking charge of the implementation of the unified supervision and management system of evaluation of the environmental effects of Laibin and Three Simultaneousness System; carrying out laws, regulations, rules and policies of evaluation of Laibin and the national relevant environmental effects and the Three Simultaneousness System; drawing-up and implementing of the evaluation of environmental effects, Three Simultaneousness System and other local laws and regulations, regulations and policies and supervising their being implemented; guiding and supervising the approval of evaluation of environmental effects of construction projects of Laibin; taking charge of the administrative licensing of documents of evaluation of environmental effects of construction projects under the jurisdiction of Laibin Environmental Protection Bureau; taking charge of the administrative licensing of trial production (operation) and environmental protection acceptance of construction project completion under the jurisdiction of Laibin.

3 Project Description and Analysis

3.1 Project Name and Components

The construction contents of Guangxi Laibin Water Environment Project include: building of four flood control dikes in Laibin main urban area, namely, Hongshui River (Shizheng Canal to Caoxiegou Canal Section) north bank flood control dike (1.33km in length), Hongshui River (Xiangyang Road to Xianggui Railway Bridge Section) north bank flood control dike (1.56km in length), Beizhijiang River (North Part of Shuiyun Canal) east bank flood control dike (2.2km in length) and Longdong River (Mengcun village to Tianran Bridge Section) north bank flood control dike (6.85km in length); newly-built slope protection for Hongshui River at the Shizheng Canal to Caoxiegou Canal Section (1.23km in length) and Xiangyang Road to Xianggui Railway Bridge Section (1.46km in length); building two Class II flood control dams on Caoxiegou Canal; building a flood control sluice gate and a drainage pump station respectively on Caoxiegou Canal, Shizheng Canal, Modong Canal, Shuiyun Canal, Xiangyang Road and Longdong River; building a check gate respectively on Laihua Canal and Caoxiegou Canal; Caoxiegou Canal (Guizhong Avenue to Hongshui River Section) ecological rehabilitation (2.9km in length); building stormwater and sewage pipeline network on the old urban areas; laying 26.123km of stormwater pipelines and 21.147km of sewage pipelines on the old urban areas in the north bank of Hongshui River; building 6.67km of sewage interception pipelines along Caoxiegou Canal, covering the total green area of 80,377m2; as well as road rehabilitation of Heshan Road and Xinxing Road (1,983 km in total length, including 1,278 km for Hedshan Road and 707km for Xinxing Road). This project components and environmental protection measures are shown in Table 3.1-1.

Table 3.1-1 Lists of Project Components

Categories

Construction Contents Descriptions

Environmental Protection Measures

Flood Control Dikes

Newly-built Hongshui River (Shizheng Canal to Caoxiegou Canal Section) north bank flood control dike (1.3km) and slope protection(1.23km)

General construction regulations (Annex 1) + Special construction regulations(9.2)

Newly-built Hongshui River (Xiangyang Road to Xianggui Railway Bridge Section) north bank flood control dike (1.56km) and slope protection (1.46km)

Newly-built Beizhijiang River (North Part of Shuiyun Canal) east bank flood control dike (2.2km)

Newly-built Longdong River (Mengcun village to Tianran Bridge Section) north bank flood control dike (6.32km)

Flood Control Sluice Gates, Drainage Pump Stations, Flood Control Dam and Check Gates

Newly-built flood control dam on Caoxiegou Canal (2 rubber dams, with single span of 15m and height of 2.5m)

General construction regulations (Annex 1) + Special construction regulations

Newly-built check gate on Caoxiegou Canal (with sluice hole of 3.0m in width 3.0m in height)

Newly-built flood control sluice gate on Caoxiegou Canal (2 holes with 4m in width and 5m in height)

Newly-built flood drainage pump station on Caoxiegou Canal

Newly-built flood control sluice gate on Shizheng Canal (3 holes with 3m in width and 3.5m in height)

Newly-built flood drainage pump station on Shizheng Canal

Newly-built flood control sluice gate on Modong Canal (2 hole with 4m in width and 4m in height)

Newly-built flood drainage pump station on Modong Canal

Newly-built flood control sluice gate on Shuiyun Canal (3 holes with 3m in width and 3.5m in height)

Newly-built flood drainage pump station on Shuiyun Canal

Newly-built flood control sluice gate on Xiangyang Road (2 holes with 3.5m in width and 3.5m in height)

Newly-built flood drainage pump station on Xiangyang Road

Newly-built flood control sluice gate on Longdong River (2 holes with 3.0m in width and 3.0m in height)

Newly-built flood drainage pump station on Longdong River

Newly-built check gate on Laihua Canal (with sluice hole of 3.0m in width 3.0m in height)

Rivercourse Treatment

Newly-built Caoxiegou Canal (Guizhong Avenue to Hongshui River Section) ecological rehabilitation: including channel dredging (2.9km), newly-built slope protection and revetment

General construction regulations (Annex 1) + Special construction regulations(9.1.1)

Stormwater Pipeline Network

Newly-built 26.123km of stormwater pipeline network on the old urban areas on the north bank and 3 stormwater drainage outlets


Sewage Pipeline Network Upgrading

Newly-built 21.147km of sewage pipeline network on the old urban areas on the north bank

Road Rehabilitation

Rehabilitation of Heshan Road (1276m) and Xinxing Road (707m) (1983m in total length)


Construction gravel storage yard and earth borrowing yard

There will be 3 earth material yards near the project areas, namely, Xigualing earth material yard, Hualou earth material yard and Jianmaling earth material yard. The volume of earth borrowing is 841,700 m3.


Temporary piling-up area of sludge

Two temporary piling-up areas of sludge will be located near the river bank and must be 50m away from the environmental sensitive points.


Spoil ground and waste slag ground

A total of 554,900 m3 of earthwork will be excavated (including stripping112,100 m3 of surface soil). It will also need to fill 1,187,200 m3 of earthwork, borrow 841,700 m3 of earthwork and have 209,400 m3 of spoil (including 129,300 m3 of permanent spoil and 80,100 of temporary spoil). The temporary spoil will be used as earth covering for landscaping. The proposed earth material grounds for this project are all located close to the construction areas. A total of 841,700 m3 of earth will be borrowed. The waste slag will be transported to the waste slag site located near Guizhong Avenue for disposal. Parts of the spoil will be transported to Laibin Waste Landfill for disposal.

General construction regulations (Annex 1)

Temporary construction access roads

All vehicles are suggested to run on the temporary construction access roads instead of surrounding village roads to avoid negative impacts on rural residents in their transport and living.


Construction area (concrete mixing stations)

Based on the volume of concrete pouring needed for the construction, a 50m3/h mixing station and 0.8m3 mixer will be set up. The mixing station should be will be located near the single building that needs a large amount of concrete pouring. The concrete will be transported to the pouring site through concrete pump, dump truck and concrete container. The 1t diesel dumper will be used to transport the concrete in some areas, with the assistance of barrow and chute for concrete pouring.


Construction camps

The construction camps will be built separately in different bidding sections, and they should be located in a high place within the scope of bidding sections. There will be 11 construction camps in total.


Resettlement sites

Gusan village resettlement site: with an area of 111.46mu

Shacun village resettlement site: with an area of 75mu

Changling village resettlement site: with an area of about 40mu


Lingkage projects

Binjiang north road (Xingbin District Navigation Administration-Xiangyang Road section) flood control dike (0.83km) and revetment (0.96 km)


3.2 Location and Land Acquisition for the Proposed Project (Sites)

The land acquisition and resettlement of Guangxi Laibin Water Environment Project involve one district (Xingbin district) and 5 villages under the jurisdiction of 4 sub-district offices/townships. Based on the topographic map (1:1000) and the red lines of project scopes provided by the project implementing agency and the land acquisition area provided by Guangxi University of Finance and Economics, together with the calculation of the topographic map, this project will permanently acquire 264.53 mu of collective land from 5 villages under the jurisdiction of Chengbei sub-district office, Hexi sub-district office, Mengcun township and Liangjiang township. This land acquisition will not cover basic farmland. 122.47 mu of collective land will be temporarily occupied as temporary sand and gravel yards, earth borrowing area, concrete mixing plant, spoil, residential area and temporary road during the construction period. The average period of temporary land occupation is 2 years. This project will also permanently acquire 94.78 mu of state-owned land and temporarily occupy 69.6 mu of state-owned land, all being unutilized land.

3.3 Project Construction Schemes

3.3.1 Flood Control Dikes and Slope Protection

3.3.1.1Flood Control Dikes

1) Hongshui River (Shizheng Canal to Caoxiegou Canal Section) north bank flood control dike

Hongshui River (Shizheng Canal to Caoxiegou Canal Section) north bank flood control dike is 1,330m in length and is part of the north Binjiang Road flood control dike section I. Part of the flood control dike is located along the north Binhe Road, while part of it is located in the inner side of north Binhe Road.

The parameters of standard section of the Hongshui River (Shizheng Canal to Caoxiegou Canal Section) north bank flood control dike are determined as follows: the dam crest level is 86.14~85.97m, the crest width is 8m (road shoulder 1.0m + traffic lane 6m + road shoulder 1.0m). The inner slope is 1:2.0 and the outer slope is 1:2.5. For the earth dike with more than 8m in height, 2m-wide berm should be built at the height of 4m. Concrete slope protection should be laid at the outer slope toe of earth dike and the concrete drainage ditch should be built in the inner slope toe. The road at the crest is in concrete structure.

The flood control dike will be built along the planned north Binhe Road and can be expanded to become part of north Binhe Road in the future.

2) Hongshui River (Xiangyang Road to Xianggui Railway Bridge Section) north bank flood control dike

Hongshui River (Xiangyang Road to Xianggui Railway Bridge Section) north bank flood control dike is 1,560m in length and is part of the north Binhe Road flood control dike section II. The dike axis will be laid along the slope crest of north bank of Hongshui River. The flood control dike will be built on the stable river bank, and the toe line of its outer slope will be controlled at a distance with no less than 5m from the crest side boundary of the stable river bank so as to minimize the impacts of land acquisition and house demolition.

The parameters of standard section of the Hongshui River (Xiangyang Road to Xianggui Railway Bridge Section) north bank flood control dike are determined as follows: the crest level is 85.75~85.33m, the crest width is 8m (road shoulder 1.0m + traffic lane 6m + road shoulder 1.0m). The inner slope is 1:2.0 and the outer slope is 1:2.5. For the earth dike with more than 8m in height, 2m-wide berm should be built at the height of 4m. Concrete slope protection should be laid at the outer slope toe of earth dike and the concrete drainage ditch should be built in the inner slope toe. The road at the crest is in concrete structure.

3) Beizhijiang River (North Part of Shuiyun Canal) east bank flood control dike

Beizhijiang River (North Part of Shuiyun Canal) east bank flood control dike is 2,200 in length and is part of the whole Beizhijiang east bank flood control dike. The dike will be laid along the Zhijiang Road, and the dike axie will be laid along 30~400m from side boundary of left bank of Hongshui River. The parameters of standard section of the Beizhijiang River (North Part of Shuiyun Canal) east bank flood control dike are determined as follows: the crest level is 86.72m, the crest width is 8m (road shoulder 1.0m + traffic lane 6m + road shoulder 1.0m). The inner slope is 1:2.0 and the outer slope is 1:2.5. For the earth dike with more than 8m in height, 2m-wide berm should be built at the height of 4m. Concrete slope protection should be laid at the outer slope toe of earth dike and the concrete drainage ditch should be built in the inner slope toe. The road at the crest is in concrete structure.

The flood control dike will be built along the planned Zhijiang Road and can be expanded to be part of Zhijiang Road in the future.

4) Longdong River (Mengcun village to Tianran Bridge Section) north bank flood control dike

The Longdong River flood control dike (6.85km) starts from Mengcun village at the north bank of Longdong River in its middle reach and ends in the Tianran Bridgethe outlet Longdong River. Since part of the protection section are hills and their existing ground level can meet the requirement of flood control. Therefore, the total length of newly-built dike will be 6.32km.

The area from Mengcun village to metallurgical plant is located in the planned new urban area. And the dike will be laid along the outer road of this area and will be built in the form of both a dike and a road. The area from metallurgical plant to Tianran Bridge is the old urban area in the south of Hongshui River. The metallurgical plant and the vehicle administration bureau is located on the left bank of Longdong River, and the dike can not pass through their plant area. Therefore, the dike will be laid on the stable slope on the left river bank along the rivercourse in a straight line.

The parameters of standard section of the Longdong River (Mengcun village to Tianran Bridge Section) flood control dike are determined as follows: the crest level is 85.51m, the crest width is 8m (road shoulder 1.0m + traffic lane 6m + road shoulder 1.0m). The inner slope is 1:2.0 and the outer slope is 1:2.5. For the earth dike with more than 8m in height, 2m-wide berm should be built at the height of 4m. Concrete slope protection should be laid at the outer slope toe of earth dike and the concrete drainage ditch should be built in the inner slope toe. The road at the crest is in concrete structure.

The flood control dike will be built along the planned Binhe Road and can be expanded to become part of Binhe Road in the future.

3.3.1.2 Slope Protection

1) Hongshui River (Shizheng Canal to Caoxiegou Canal Section)

Newly-built slope protection is necessary for the whole section of Hongshui River (Shizheng Canal to Caoxiegou Canal Section). The galvanized steel wire gabion slope protection will be built, with a total length of 1,230m

The base elevation of the galvanized steel wire gabion slope protection is 62.0~64.0m. The crest level is 76.0m and the gradient of the slope protection is 1:1.5. The galvanized steel wire gabion slope protection will be 500m in thickness and will be filled inside with block stone. Gabion capping 1000500 (height width) will be built at the top of the slope protection, and the gabion 600500 (height width)will be also built at the base of the slope protection.

The slope gradient of Hongshui River bank above 76.0m ranges from 1:1.25~1:1.5, and the slope protection will be built according to the slope gradient of 1:1.5. The turf will be planted on the slope.

2) Hongshui River (Xiangyang Road to Xianggui Railway Bridge Section)

Newly-built slope protection is necessary for the whole section of Hongshui River (Xiangyang Road to Xianggui Railway Bridge Section). The galvanized steel wire gabion slope protection will be built, with a total length of 1,460m.

The base elevation of the galvanized steel wire gabion slope protection is 60.0~64.8m. The crest level is 75.0m and the gradient of the slope protection is 1:1.5. The galvanized steel wire gabion slope protection will be 500m in thickness and will be filled inside with block stone. Gabion capping 1000500 (height width) will be built at the top of the slope protection, and the gabion 600500 (height width)will be also built at the base of the slope protection.

The slope gradient of Hongshui River bank above 75.0m ranges from 1:1.25~1:1.5, and the slope protection will be built according to the slope gradient of 1:1.5. The turf will be planted on the slope.

3.3.2 Flood Control and Drainage Sluice Gates

A flood control and drainage sluice gate will be built respectively on Shuiyun Canal, Modong Canal, Shizheng Canal, Caoxiegou Canal, Xiangyang Road and Longdong River. All the sluice gates will be in C25 reinforced concrete culvert structure.

The sluice gate on Shuiyun Canal will be built together with the Beizhijiang River east bank flood control dike (North Part of Shuiyun Canal section). It is located in the intersection of Shuiyun Canal and the flood control dike, and its corresponding flood control dike stake number is K2+200. The elevation of the base slab of sluice gate is 75.0m, and the sluice gate will have 3 holes with 3m in width and 3.5m in height.

The sluice gate on Modong Canal will be built together with the Hongshui River flood control dike at the section of North Binjiang Road section I. It is located in the intersection of Modong Canal and the flood control dike. The elevation of the base slab of sluice gate is 76.0m, and the sluice gate will have 2 holes with 4m in width and 4m in height.

The sluice gate on Shizheng Canal will be built together with the Hongshui River flood control dike (Caoxiegou Canal to Shizheng Canal section). It is located in the intersection of Shizheng Canal and the flood control dike, and its corresponding flood control dike stake number is K0+100. The elevation of the base slab of sluice gate is 76.5m, and the sluice gate will have 3 holes with 3m in width and 3.5m in height.

The sluice gate on Caoxiegou Canal will be built together with the Hongshui River flood control dike (Caoxiegou Canal to Shizheng Canal section). It is located in the intersection of Shizheng Canal and the flood control dike, and its corresponding flood control dike stake number is K1+200. The elevation of the base slab of sluice gate is 67.5m, and the sluice gate will have 2 holes with 4m in width and 5m in height.

The sluice gate on Xiangyang Road will be built together with the Hongshui River flood control dike (Xiangyang Road to Xianggui Railway Bridge section). It is located in the intersection of Xiangyang Road sewage pipeline and the flood control dike, and its corresponding flood control dike stake number is K0+100. The elevation of the base slab of sluice gate is 71.5m, and the sluice gate will have 2 holes with 3.5m in width and 3.5m in height.

The sluice gate on Longdong River will be built together with the Longdong River flood control dike (Mengcun village to Tianran Bridge section). It is located in the intersection of Linghu Lake and the flood control dike, and its corresponding flood control dike stake number is K3+584. The elevation of the base slab of sluice gate is 74.7m, and the sluice gate will have 2 holes with 3.0m in width and 3.0m in height.

3.3.3 Flood Drainage Pump Stations

A flood drainage pump station will be built respectively on Shuiyun Canal, Modong Canal, Shizheng Canal, Caoxiegou Canal, Xiangyang Road and Longdong River. All the sluice gates will be in C25 reinforced concrete culvert structure. Main structures of the pump station include forebay, intake chamber, pump house, pressure water tank and electrical substation.

The pump station on Shuiyun Canal will be built together with the Beizhijiang River east bank flood control dike (North Part of Shuiyun Canal section). It is located in the intersection of Shuiyun Canal and the flood control dike, and its corresponding flood control dike stake number is K2+200. It is a levee-top pump station located in the right bank of Shuiyun Canal. The elevation of the base slab of intake chamber is 76.5m. The elevation of pump layer and operational layer is 79.05m and 84.0m respectively. The culvert outlet will have one hole with 3m in width and 3.5m in height.

The pump station on Modong Canal will be built together with the Hongshui River flood control dike (North Binjiang Road section I). It is located in the intersection of Modong Canal and the flood control dike. It is a levee-top pump station located in the right bank of Modong Canal. The elevation of the base slab of intake chamber is 76.5m. The elevation of pump layer and operational layer is 79.05m and 84.0m respectively. The culvert outlet will have one hole with 3m in width and 3.5m in height.

The pump station on Shizheng Canal will be built together with the Hongshui River flood control dike (Caoxiegou Canal to Shizheng Canal section). It is located in the intersection of Shizheng Canal and the flood control dike. It is a levee-top pump station located in the right bank of Shizheng Canal. The elevation of the base slab of intake chamber is 76.5m. The elevation of pump layer and operational layer is 79.05m and 84.0m respectively. The culvert outlet will have one hole with 3m in width and 3.5m in height.

The pump station on Caoxiegou Canal will be built together with the Hongshui River flood control dike (Caoxiegou Canal to Shizheng Canal section). It is located in the intersection of Caoxiegou Canal and the flood control dike, and its corresponding flood control dike stake number is K1+200. It is a levee-top pump station located in the right bank of Caoxiegou Canal. The elevation of the base slab of intake chamber is 74.5m. The elevation of pump layer and operational layer is 79.05m and 84.5m respectively. The culvert outlet will have one hole with 4m in width and 4m in height.

The pump station on Xiangyang Road will be built together with the Hongshui River flood control dike (Xiangyang Road to Xianggui Railway Bridge section). It is located in the intersection of Xiangyang Road sewage pipeline and the flood control dike and is a levee-top pump station. The elevation of the base slab of intake chamber is 74.5m. The elevation of pump layer and operational layer is 79.05m and 84.5m respectively. The culvert outlet will have one hole with 3.0m in width and 3.0m in height.

The pump station on Longdong River will be built together with the Hongshui River flood control dike (Mengcun village to Tianran Bridge section). It is located in the intersection of Linghu Lake. Its corresponding flood control dike stake number is K3+584 and it is a levee-top pump station. The elevation of the base slab of intake chamber is 74.5m. The elevation of pump layer and operational layer is 79.05m and 84.5m respectively. The culvert outlet will have one hole with 3.0m in width and 3.0m in height.

3.3.4 Check Gates and Flood Control Dams

(1) Check Gates on Laihua Canal

The check gate on Laihua Canal is located in the intersection between the head of Laihua Canal and Chengbei Canal. It is a control gate for flushing water in the Laihua Canal, and its main structures include the inlet section, sluice chamber section and the outlet section. The sluice chamber section is in C25 reinforced concrete structure and is composed of sluice pier, frame bent, sluice gate and maintenance platform. The sluice chamber is 8m in length and the sluice pier is 0.80m in thickness. The control gate is in steel structure. The size of sluice hole is 3.0m in width 3.0m in height. The elevation of the base slab of check gate is 78.3m and the normal water level is 80.0m.

(2) Check Gates on Caoxiegou Canal

The check gate on Caoxiegou Canal is located in the intersection between the head of Caoxiegou Canal and Chengbei Canal. It is a control gate for flushing water in the Caoxiegou Canal, and its main structures include the inlet section, sluice chamber section and the outlet section. The sluice chamber section is in C25 reinforced concrete structure and is composed of sluice pier, frame bent, sluice gate and maintenance platform. The sluice chamber is 8m long in the direction of water current and the sluice pier is 0.80m in thickness. The control gate is in steel structure. The size of sluice hole is 3.0m in width 3.0m in height. The elevation of the base slab of check gate is 77.4m and the normal water level is 80.0m.

(3) Rubber Dam #1 on Caoxiegou Canal

Rubber Dam #1 on Caoxiegou Canal is located in the outlet of Caoxie Lake and its corresponding canal central line stake number is K2+920 m (starting from Chengbei Canal). Its single span is 15m. Both banks of the dam are vertical retaining walls. The bottom elevation of the rubber dam is 76.0m and the crest level is 78.5m. The sluice chamber is 10.0m long in the direction of water current. The water supply and drainage pipelines are laid inside the bottom slab of the dam.

(4) Rubber Dam #2 on Caoxiegou Canal

Rubber Dam #2 on Caoxiegou Canal is located in the lower reach of Caoxie Lake and its corresponding canal central line stake number is K4+480 m (starting from Chengbei Canal). Its single span is 15m. Both banks of the dam are vertical retaining walls. The bottom elevation of the rubber dam is 71.9m and the crest level is 76.5m. The sluice chamber is 10.0m long in the direction of water current. The water supply and drainage pipelines are laid inside the bottom slab of the dam.

3.3.5 Rivercouse Rehabilitation of Caoxiegou Canal

The rehabilitation scopes of Caoxiegou Canal ranges from Guizhong Avenue to Hongshui River, with a total length of 2,900m. The Caoxiegou Canal rehabilitation engineering includes channel dredging, newly-built revetment and slope protection. Based on the calculation, the dredging sludge volume of Caoxiegou Canal is estimated to be 22,500 m3. Caoxiegou Canal mainly absorbs the domestic sewage and unorganized non-point source pollutants from its both banks, and there is no industrial pollutant sources discharged into the canal. The monitoring results of different factors of the sludge leachate show that all the factors are within the standard values of the Identification Standards for Hazardous Wastes Identification for Extraction Toxicity (GB5085.3-2007). Therefore, the sludge will be transported to Laibin Waste Landfill for landfill.

The width of river bottom of Caoxiegou Canal is designed to be 15m, with an elevation of 75.71~67.5m. The design canal gradient is 1.31, 0.63 and 6.03.

Most ground area along the Caoxiegou Canal is above the design flood level and no new flood control dikes are necessary along the canal. Some sections such as the beginning of the engineering being lower than the design flood level will need to be elevated to be above the design flood level.

The canal section of Caoxiegou Canal will be in the form of stone masonry retaining wall revetment + landscape turf slope protection.

3.3.6 Pipeline Networks

3.3.6.1 Stormwater Pipeline Network

Three stormwater drainage outlets will be newly-built. The contents of stormwater drainage pipeline network are listed in Attached Map 4.

1) Beiyi Road to Caoxiegou Canal drainage system (The drainage system includes an interception combined system and a separate system): A new drainage outlet will be built and its water collection area is 69.17ha. The design rainwater pipe diameter in the service area is d800~d2200mm, and the gradient is 2~3.

2) Qianwei Road to Caoxiegou Canal drainage system (The drainage system includes an interception combined system and a separate system) : A new drainage outlet will be built and its water collection area is 49.05ha. The design rainwater pipe diameter in the service area is d600~d1800 mm, and the gradient is 1.5~3.

3) Liulai Road to Caoxiegou Canal drainage system (The drainage system is an interception combined system): The drainage outlet has been built and its water collection area is 16.70ha. The combined system will remain unchanged in this area.

4) Liulai Road to Hongshui River drainage system (The drainage system includes an interception combined system and a separate system) : The drainage outlet has been built and its water collection area is 35.46ha. The design rainwater pipe diameter in the service area is d600~d1350mm, and the gradient is 2~5.

5) No. 3 Middle School karst cave drainage system (The drainage system includes an interception combined system and a separate system) : A new drainage outlet will be built and its water collection area is 380ha. The design rainwater pipe diameter in the service area is d500~d2200mm. The canal section is 2.62.2~2.82.2m (width x height) and the gradient is 1.5~10.

3.3.6.2 Sewage Pipeline Network Upgrading in the Old Urban Area

With the implementation of flood control engineering and the pipeline network upgrading in the old urban area, the combined drainage system in the old urban area should be upgraded into a drainage system including a separate system and interception combined system. The sewage of this area is within the service area of Chengdong Wastewater Treatment Plant. The collected sewage will be transported to Chengdong Wastewater Treatment Plant. The sewage pipeline network will not only carry the sewage in the area but also transport the sewage collected from other areas in the north of Hongshui River to the Chengdong Wastewater Treatment Plant. Based on the planning, two sewage trunk pipelines A and B will be laid in the project area.

Sewage trunk pipeline A (The trunk pipeline has been built): With a pipe diameter of d1500, the sewage trunk pipeline A not only carries most of sewage collected in the area but also carries the sewage collected from the Beicheng commercial cluster area. It is laid along Caoxiegou Canal from south to north and extended to Weihuan Road, Liulai Road, Qianwei Road, Zhongnan Road, Dongyi Road and eventually to Chengdong Wastewater Treatment Plant. It will connect with the sewage trunk pipeline A and be discharged to the sewage pipeline network in the lower reach after lifted by the sewage lift pump station.

Sewage trunk pipeline B (newly built): With the pipe diameter of d1800, it will mainly collect and transport the sewage collected from Laihua Educational cluster area in the long run. It will be laid along Weilin Avenue and Binhe Road and eventually extended to Chengdong Wastewater Treatment Plant. It will connect with the sewage trunk pipeline A at Weihuan Road in the near future and will be discharged to the sewage pipeline network in the lower reach after lifted by the sewage lift pump station.

3.3.7 Road Rehabilitation

Based on the surveys on the road conditions of Heshan Road and Xinxing Road, the existing cement concrete pavement is seriously damaged. All the existing road pavement will be demolished and will be rehabilitated. The road rehabilitation will cover 2km (about 1.3km in Heshan Road and 0.7km in Xinxing Road). The road rehabilitation is a pilot project and the new road will have permeable pavement.

(1) The motorway of Heshan Road and Xinxing Road will be in OGFC permeable pavement structure. The pavement cross section is shown in Figure 3.3-1.

Figure 3.3-1 Pavement Upgrading Cross Section of Heshan Road and Xinxing Road

(2) Improving sidewalk structure to increase permeability

The design sidewalk will be laid with permeable floor brick and its base structure will also be laid with permeable materials. The permeable sidewalk allows part of rainwater to permeate into underground, reduce the peak flow of rainwater and make it safer for pedestrians to walk on the sidewalk during rainy days. The pavement structures of sidewalk from top to down include respectively: 6cm-thick interlocking permeable bricks, 3cm-thick cement mortar layer at the ratio of 1:2, 18cm-thick 4.5% cement stable gravel and 15cm-thick concrete cushion layer.

3.3.8 Hydraulic Machinery, Electrical Engineering and Metal Structure

(1) Hydraulic Machinery

The hydraulic machinery mainly include the pumps, water supply and drainage system, and auxiliary equipment such as crane and machine maintenance for 6 flood control and drainage pump stations, water supply and drainage system and auxiliary equipment for two rubber dams.

The design flow of pump station on Shuiyun Canal is 13.6m3/s. The pump model is ZL3612-5. There are total 6 pumps, with a total power of 960kW.

The design flow of pump station on Modong Can