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HJ 2.3-2018 English PDF

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HJ 2.3-2018: Technical guidelines for environmental impact assessment surface water environment
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HJ 2.3-2018English1519 Add to Cart 9 days [Need to translate] Technical guidelines for environmental impact assessment surface water environment Valid HJ 2.3-2018
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Basic data

Standard ID HJ 2.3-2018 (HJ2.3-2018)
Description (Translated English) Technical guidelines for environmental impact assessment surface water environment
Sector / Industry Environmental Protection Industry Standard
Classification of Chinese Standard Z00
Word Count Estimation 66,610
Issuing agency(ies) Ministry of Ecology and Environment

HJ 2.3-2018: Technical guidelines for environmental impact assessment surface water environment


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Technical guidelines for environmental impact assessment surface water environment Replace HJ/T 2.3-93 Technical guidelines for environmental impact assessment Surface water environment Technical guidelines for environmental impact assessment Surface water environment Published on.2018-09-30 2019-03-01 implementation Ministry of Ecology and Environment released

Content

Preface ii 1 Scope..1 2 Normative references..1 3 Terms and Definitions.1 4 General. 2 5 Evaluation level and evaluation range determined. 4 6 Environmental Status Survey and Evaluation 9 7 Surface water environmental impact prediction.13 8 Surface water environmental impact assessment. 18 9 Environmental Protection Measures and Monitoring Plan..21 10 Conclusions on surface water environmental impact assessment..22 Appendix A (Normative Appendix) Table of Contaminants and Equivalent Values.24 Appendix B (normative appendix) Environmental Status Survey Content.27 Appendix C (normative appendix) supplementary survey monitoring points and sampling frequency..29 Appendix D (Normative Appendix) Water Environmental Quality Assessment Method 31 Appendix E (normative appendix) Basic equations and solutions for commonly used mathematical models in rivers, lakes, estuaries and coastal waters 33 Appendix F (normative appendix) special mathematical model and basic solution for the estuary and nearshore waters of the sea..49 Appendix G (Normative Appendix) Construction Project Pollutant Emissions Information Table 54 Appendix H (informative appendix) construction project surface water environmental impact assessment self-checking table..60

Foreword

To implement the Environmental Protection Law of the People's Republic of China, the Environmental Impact Assessment Law of the People's Republic of China The Prevention and Control Law and the Regulations on Environmental Protection Management of Construction Projects, guide and standardize the surface water environmental impact assessment of construction projects, and promote the water ring Environmental protection, the development of this standard. This standard specifies the general principles, working procedures, contents, methods and requirements for surface water environmental impact assessment. This standard was first published in.1993. This is the first revision. The main changes are. -- Revised the standard name and revised it from the Technical Guidelines for Environmental Impact Assessment to Surface Water Environment to the Technical Guidelines for Environmental Impact Assessment Surface water environment"; -- Adjust and improve the terms and definitions; -- Revised and improved the classification criteria for surface water environmental impact assessment work, simplifying the evaluation of water pollution impact construction projects, etc. The judgment basis of the level increases the judgment basis for the evaluation level of the hydrological element-affected construction project; - Increased the scope of evaluation and the determination of the evaluation period; -- Adjusting and improving the status quo investigation and supplementary monitoring requirements, simplifying the investigation requirements for indirect emission projects; --Improved the prediction method of surface water environmental impact, and increased the numerical solution prediction model for rivers, lakes, estuaries and coastal waters. Type, perfecting the analytical solution model; simplifying the forecasting requirements of indirect emissions projects; -- Improve the content and requirements of water environmental impact assessment and simplify the evaluation requirements of indirect emission projects; -- Increased the calculation requirements and evaluation contents of pollution source emissions and ecological flows; -- Increased the content requirements for surface water environmental protection measures and surface water environmental impact assessment conclusions; -- Adjusted and added the appendix. From the date of implementation of this standard, the Technical Guidelines for Environmental Impact Assessment (GJ/T 2.3-93) shall be abolished. Appendix A ~ G of this standard is a normative appendix, and Appendix H is an informative appendix. This standard is revised and revised by the Department of Environmental Impact Assessment and Emission Management of the Ministry of Ecology and Environment, and the Department of Regulations and Standards. The main drafting unit of this standard. Environmental Engineering Evaluation Center of the Ministry of Environmental Protection, China Institute of Water Resources and Hydropower Research. This standard is approved by the Ministry of Ecology and Environment on September 30,.2018. This standard has been implemented since March 1,.2019. This standard is explained by the Ministry of Ecology and Environment. Environmental Impact Assessment Technical Guidelines Surface Water Environment

1 Scope of application

This standard specifies the general principles, working procedures, contents, methods and requirements for surface water environmental impact assessment. This standard applies to the surface water environmental impact assessment of construction projects. Surface water environmental impact assessment in planning environmental impact assessment Refer to this standard for implementation.

2 Normative references

The contents of this standard refer to the following documents or their terms. For undated references, the valid version applies to this standard. quasi. GB 3097 seawater quality standard GB 3838 Surface Water Environmental Quality Standard GB 5084 Farmland Irrigation Water Quality Standard GB 11607 Fishery Water Quality Standard GB 17378 Ocean Monitoring Code GB 18421 Quality of marine life GB 18486 Wastewater Marine Disposal Project Pollution Control Standard GB 18668 Marine sediment quality GB 50179 River Flow Test Specification GB/T 12763 Ocean Survey Specification GB/T 14914 Seaside Observation Specification GB/T 19485 Technical Guidelines for Environmental Impact Assessment of Marine Engineering GB/T 25173 water area pollution capacity calculation procedures HJ 2.1 General Outline of Technical Guidelines for Environmental Impact Assessment of Construction Projects HJ 442 Code for Environmental Monitoring of Coastal Waters HJ 819 General Guidelines for Self-Monitoring Technical Units of Sewage Units HJ 884 Guidelines for Strong Sources of Pollution Sources HJ 942 General Regulations for the Application and Issuance of Pollution Discharge Permits HJ/T 91 Surface Water and Wastewater Monitoring Technical Specifications HJ/T 92 Water Pollutant Total Monitoring Technical Specification SL 278 Hydrological calculation code for water conservancy and hydropower projects

3 Terms and definitions

The following terms and definitions apply to this standard. 3.1 Surface water It exists on the surface of rivers (rivers, canals and channels), lakes, reservoirs and other surface water bodies as well as into the estuary and nearshore waters. 3.2 Water environment protection target Drinking water source protection area, drinking water intake, wading nature reserve, scenic spots, important wetlands, key protection and Zhen Habitats of rare aquatic organisms, natural spawning grounds for important aquatic organisms, feeding grounds, wintering grounds and migratory passages, fishery water such as natural fisheries Body, as well as aquatic germplasm resources conservation areas. 3.3 Water pollution equivalent Measure different pollutants according to the degree of harmfulness of pollutants or pollution discharge activities to the surface water environment and the technical economy of treatment A comprehensive indicator or unit of measurement for surface water pollution. 3.4 Control unit The water environment space control unit delineated by considering the three elements of water body, catchment range and control section. 3.5 Ecological flow The flow (water level) and process required to meet the ecological protection requirements of rivers and lakes and to maintain the structure and function of ecosystems. 3.6 Margin of safety Considering the uncertainties between the pollution load and the water environment quality of the receiving water, in order to improve the water environment quality of the receiving water body The amount of load reserved for safety.

4 General

4.1 Basic tasks Based on the investigation and analysis of the assessment of the surface water environmental quality status and water environmental protection objectives of the evaluation scope, forecast and evaluate the construction project Surface water environmental quality, water environment functional area, water function area, water environmental protection target and water environment control unit influence range and influence process Degree, propose corresponding environmental protection measures and environmental management and monitoring plans, and clearly indicate whether the environmental impact of surface water is acceptable. 4.2 Basic requirements 4.2.1 The surface water environmental impact of the construction project mainly includes the impact of water pollution and the impact of hydrological factors. Construction projects based on their main impact The environmental impact assessment of surface water is divided into water pollution impact type, hydrological factor influence type and the combined impact type of both. 4.2.2 Surface water environmental impact assessment shall carry out corresponding evaluation work according to the evaluation grades specified in this standard. Construction project evaluation grade is divided into The third level, classification principle and criteria are shown in 5.2. For the evaluation of composite influential construction projects, the evaluation grades shall be determined separately according to the categories and evaluations shall be carried out. Price work. 4.2.3 The discharge water pollutants of the construction project should meet the requirements of national or local water pollutant discharge standards, and should also meet the environmental quality of the receiving water body. The quantity management requirements are linked to the requirements related to the sewage permit management system. Hydrological factors affecting construction projects should also meet the ecological flow related requirements. 4.3 Working procedures The working procedure of surface water environmental impact assessment is shown in Figure 1, which is generally divided into three phases. In the first phase, study relevant documents, conduct preliminary analysis of engineering plans and environmental impacts, and conduct preliminary adjustment of regional environmental conditions. Check, identify the water environment functional area or water function area management requirements, identify the main environmental impact, and determine the evaluation category. According to different evaluation categories Further screening evaluation factors, determining evaluation levels, evaluation scopes, and clarifying evaluation criteria, evaluation priorities, and water environmental protection objectives. In the second stage, according to the evaluation category, evaluation level and evaluation scope, the pollution sources related to surface water environmental impact assessment are carried out. Survey and evaluation of water environmental quality status, hydrology and water resources and water environmental protection objectives, and supplementary monitoring when necessary; selection of appropriate forecasts Model, carry out prediction and evaluation of surface water environmental impact, analyze and evaluate construction project on surface water environmental quality, hydrological factors and water environmental protection The scope and extent of the target's impact, on the basis of which the pollution source emissions and ecological flows of the construction project are accounted for. In the third stage, according to the results of the prediction and evaluation of the surface water environment impact of the construction project, the environmental protection measures for surface water shall be formulated. Evaluation of the effectiveness of environmental protection measures for surface waters, preparation of surface water environment monitoring plans, and submission of pollutant discharge lists and surface water rings for construction projects Conclusion of the impact assessment, complete the preparation of the environmental impact assessment document. Figure 1 Block diagram of surface water environmental impact assessment work

5 Evaluation level and evaluation scope determination

5.1 Environmental Impact Identification and Evaluation Factors Screening 5.1.1 Surface water environmental impact factors should be identified in accordance with the requirements of HJ 2.1, analysis of construction project construction phase, production operation phase and service After the expiration (according to the project situation, the same below), the impact of various stages on the surface water environmental quality and hydrological factors. 5.1.2 The screening of evaluation factors for water pollution-influencing construction projects should meet the following requirements. a) According to the technical guidelines for strong source of pollution sources, carry out identification of pollution sources and water pollution factors of construction projects, combined with the construction project The status of water environment control unit or regional water environment quality, screening factors for survey and evaluation of water environment status and impact prediction and evaluation; b) Water pollutants involved in industrial pollutant discharge standards should be used as evaluation factors; c) The first type of pollutant discharged from the discharge of the treatment facility in the workshop or workshop shall be used as an evaluation factor; d) the water temperature should be used as an evaluation factor; e) The main pollutants contained in non-point source pollution should be used as evaluation factors; f) Water quality exceeding the standard factor or potential pollution factor of the control unit that is discharged by the construction project (refers to water in the past three years) The water quality factor with an upward trend in the concentration value should be used as an evaluation factor. 5.1.3 Hydrological factors The evaluation factors of construction projects should be determined according to the characteristics of the impact of construction projects on the hydrological factors of surface water bodies. River The flow, lake and reservoir mainly evaluate the water surface area, water volume, water temperature, runoff process, water level, water depth, flow rate, water surface width, erosion and siltation changes, etc. Factors, lakes and reservoirs need to focus on factors such as the area of the lake's waters or the amount of water storage and hydraulic retention time. The tidal reaches, the estuary and the estuary The coastal waters mainly evaluate the flow, flow direction, tidal zone boundary, tidal current, nano-tidal volume, water level, flow velocity, water surface width, water depth, and erosion and siltation. child. 5.1.4 Construction projects may lead to eutrophication of the receiving water body, and the evaluation factors should also include factors related to eutrophication (such as total phosphorus, total Nitrogen, chlorophyll a, permanganate index and transparency. Among them, chlorophyll a is a factor that must be evaluated). 5.2 Evaluation level determination 5.2.1 Surface water environmental impact assessment level of construction projects According to the type of impact, emission mode, emissions or impact, receiving water ring The status of environmental quality and water environmental protection objectives are comprehensively determined. 5.2.2 Water pollution impact construction projects are classified according to emission methods and wastewater discharge levels, as shown in Table 1. 5.2.2.1 The direct emission construction project evaluation grade is divided into first, second and third grade A, according to wastewater discharge amount, water pollutant pollution equivalent The number is determined. 5.2.2.2 The evaluation level of indirect discharge construction projects is Grade III B. Table 1 Evaluation of evaluation level of water pollution affected construction projects Evaluation level Judgment basis Emission method Wastewater discharge Q/(m3/d); Water pollutant equivalent number W/(dimensionless) First-level direct emission Q≥20000 or W≥600000 Secondary direct discharge other Level 3 A direct discharge Q< 200 and W< 6000 Level 3 B indirect emissions - Note 1. The number of water pollutant equivalents is equal to the annual emissions of the pollutant divided by the pollutant equivalent of the pollutant (see Appendix A). The quantity should distinguish between the first type of water pollutants and other water-like pollutants, the sum of the first type of pollutant equivalents, and then the other types of pollutants according to the pollutant equivalent. The number is sorted from large to small, and the maximum number of equivalents is taken as the basis for determining the evaluation level of the construction project. Note 2. The discharge of wastewater is based on the type of wastewater specified in the industry emission standards. It is reasonably determined through engineering analysis without the requirements of relevant industry emission standards. The discharge of cooling water containing a large amount of heat may not count the discharge of indirect cooling water, circulating water, and other clean water containing very little pollutants... Note 3. In the plant area, there are deposits (raw materials, fuel, waste residue, etc., and garbage dumps), and dust pollution. The initial rainwater should be included in the wastewater discharge. Continued Evaluation level Judgment basis Emission method Wastewater discharge Q/(m3/d); Water pollutant equivalent number W/(dimensionless) The amount of the corresponding major pollutants is included in the calculation of the water pollution equivalent. Note 4. If the construction project directly discharges the first type of pollutants, the evaluation level is one level; the pollutants directly discharged from the construction project are the over-standard factors of the receiving water body, The price level is not lower than the second level. Note 5. The scope of direct discharge of receiving water bodies involves drinking water source protection areas, drinking water intakes, habitats for key protection and rare aquatic organisms, and important water. When the target is protected by a natural spawning ground such as a living organism, the evaluation level is not lower than the second level. Note 6. The discharge of warm water from the construction project to the river and lake reservoir causes the water temperature change of the receiving water body to exceed the water environmental quality standard requirements, and the evaluation range has water temperature sensitive targets. When the rating is one level. Note 7. The construction project uses seawater as the temperature regulating medium, the displacement is ≥5 million m3/d, the evaluation level is one level; the displacement is < 5 million m3/d, the evaluation level For the second level. Note 8. If the discharge water quality only meets the requirements of the water quality standard of the receiving water body, the evaluation grade is Grade III A. Note 9. For the direct discharge construction project that relies on the existing discharge port and the external environment has not newly added pollutants, the evaluation grade refers to indirect discharge and is designated as Grade III B. Note 10. Waste water is produced in the production process of the construction project, but as the return water is used and is not discharged to the external environment, it is evaluated according to the third grade B. 5.2.3 Classification of the classification of the affected construction projects of hydrological factors According to the three types of hydrological elements such as water temperature, runoff and affected surface waters The degree of sound is judged, see Table 2. Table 2 Evaluation of evaluation level of hydrological elements affected construction projects Evaluation grade Water temperature runoff affected surface waters Annual runoff and total Storage percentage α / % Xingli storage and annual path Flow percentage β/ % Take up more water Annual average runoff Percentage γ / % Engineering vertical projection area And the expansion range A1/ km2; Engineering disturbed water bottom area A2/ km2; Cross-water section width occupation ratio or occupied water area Ratio R/% Engineering vertical projection Area and external expansion Surrounding A1/km2; Engineering disturbing underwater Area A2/ km2 River lake library Into the sea estuary, near shore Sea area First level Α≤10; or stable Layering ≥≥20; or full year Regulation and multi-year adjustment Γ≥30 A1 ≥ 0.3; or A2 ≥ 1.5; or R ≥ 10 A1 ≥ 0.3; or A2 ≥ 1.5; or R ≥ 20 A1 ≥ 0.5; or A2 ≥ 3 Secondary 20 >α >10; or Unstable stratification 20 >β >2; or season Regulation and incomplete years Adjustment 30 >γ >10 0.3 >A1 >0.05; or 1.5 >A2 >0.2; or 10 >R >5 0.3 >A1 >0.05; or 1.5 >A2 >0.2; or 20 >R >5 0.5 >A1 >0.15; Or 3 >A2 >0.5 Third level ≥≥20; or mix β ≤ 2; or no adjustment γ ≤ 10 A1 ≤ 0.05; or A2≤0.2; or R≤5 A1 ≤ 0.05; or A2≤0.2; or R≤5 A1 ≤ 0.15; or A2≤0.5 Continued Evaluation grade Water temperature runoff affected surface waters Annual runoff and total Storage percentage α / % Xingli storage and annual path Flow percentage β/ % Take up more water Annual average runoff Percentage γ / % Engineering vertical projection area And the expansion range A1/ km2; Engineering disturbed water bottom area A2/ km2; Cross-water section width occupation ratio or occupied water area Ratio R/% Engineering vertical projection Area and external expansion Surrounding A1/km2; Engineering disturbing underwater Area A2/ km2 River lake library Into the sea estuary, near shore Sea area Note 1. The scope of influence involves drinking water source protection areas, habitats for key protection and rare aquatic organisms, natural spawning grounds for important aquatic organisms, and nature reserves. Such as the protection target, the evaluation level should not be lower than the second level. Note 2. Inter-basin water transfer and diversion power stations may be affected by the river flood tide section, and the evaluation level is not lower than the second level. Note 3. The width of the estuary (bay mouth) is narrow (the narrow beam size is more than 5% of the original width), and the evaluation level should not be lower than the second level. Note 4. For hydraulic structures with long-term construction in impervious unidirectional directions (such as breakwaters, dikes, etc.), they are perpendicular to the tangential direction of the main flow or current flow. When the shadow length is greater than 2 km, the evaluation level shall not be lower than the second level. Note 5. Projects allowed to be constructed in a type of sea area are rated at one level. Note 6. There are multiple construction projects affected by hydrological factors at the same time, and each hydrological factor impact evaluation level is determined separately, and the highest level is taken as the hydrological element shadow. Evaluation level of the sounding construction project. 5.3 Determination of the scope of the evaluation 5.3.1 Surface water environmental impact assessment scope of construction projects refers to the range of impacts that may be caused to the surface water environment after the overall implementation of the construction project. 5.3.2 The scope of evaluation of water pollution-influencing construction projects, according to the evaluation grade, engineering characteristics, impact mode and extent, surface water environment quality Quantity management requirements are determined. 5.3.2.1 Levels A, 2 and 3 A shall have the following evaluation requirements. a) According to the migration and transformation of major pollutants, at least the waters affected by the pollution of the construction project should be covered; b) When the receiving water body is a river, the requirements of covering the control section, the control section and the reduction section should be satisfied; c) When the receiving water body is a lake or a reservoir, the first-level evaluation shall be no less than the center of the discharge port of the lake (...

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