水电工程的环境_健康和安全途径（英文版）_72页_1mb

Environmental, Health, and Safety Approaches for Hydropower Projects Summary

Core Content

This document is a Good Practice Note (GPN) by the International Finance Corporation (IFC) that outlines environmental, health, and safety (EHS) approaches for hydropower projects. It serves as a technical reference and complements the IFC's broader EHS guidelines and performance standards. The GPN is intended to guide the identification, avoidance, mitigation, and management of EHS risks and impacts in hydropower development, particularly during the design, construction, and operational phases.

Main Views

The document emphasizes the complex and context-specific nature of EHS risks in hydropower projects, which can vary based on:

• Project size and type (e.g., run-of-river, storage reservoir, pumped storage)
• Location (e.g., proximity to biodiversity hotspots, water-stressed areas)
• Operating mode (e.g., seasonal flow patterns, peak discharge)
• Interactions with local ecosystems and human communities

Key areas of focus include:

1. Environmental Impacts and Management

• Climate Change Risks: Hydropower production is vulnerable to climate change due to altered precipitation patterns, glacier and snowmelt changes, and increased flood or drought risks. These factors can impact reservoir capacity, turbine performance, and community water access.
• Watershed Management: Hydropower projects depend on the maintenance of ecosystem services such as water regulation, sediment control, and nutrient input. Poor watershed management by third parties (e.g., deforestation, unsustainable agriculture) can reduce the operational efficiency of hydropower projects.
• Habitat Conversion: Reservoir creation, changes in flow regimes, and infrastructure development can lead to habitat degradation and conversion, threatening aquatic and terrestrial biodiversity. This is especially critical in biological corridors and areas of high conservation value.
• Instream Flow Changes: Altered water flow, quality, and sediment dynamics can affect aquatic ecosystems, fish migration, and ecosystem services. The document recommends environmental flow (EFlow) assessments to ensure ecosystem health and community needs are met.

2. Occupational Health and Safety (OHS)

• Construction OHS: Safety during construction is critical, including risk management for rock slides and snow avalanches, which are common in certain regions.
• Operation OHS: Safety measures must be in place during the operational phase to protect workers and publics, especially in areas with high-risk environments.

3. Community Health and Safety

• Dam Safety and Emergency Preparedness: Projects must include emergency action plans (EAPs) and risk assessments to prevent glacial lake outburst floods (GLOF) and slope failures.
• Infrastructure Safety: The safety of reservoirs and related structures is a priority, with a focus on community health, public safety, and local economic stability.

Key Information

Performance Indicators and Monitoring

• Environmental Monitoring: Includes emissions and effluent guidelines, water quality monitoring, and baseline assessments of hydrologic regimes and ecosystem conditions.
• OHS Monitoring: Focuses on accident and fatality rates, compliance with OHS guidelines, and risk mitigation strategies.

Recommendations

• Conduct early and comprehensive environmental assessments using participatory stakeholder approaches.
• Consider strategic site selection to avoid areas of high biodiversity, cultural significance, and aesthetic value.
• Implement adaptive resource management (ARM) to account for uncertainty in baseline data and potential impacts.
• Establish environmental flows (EFlows) based on site-specific conditions and scientific methodologies.
• Ensure operational flexibility to maintain ecosystem services and community needs.
• Develop collaborative watershed management programs with local landowners, conservation organizations, and public/private institutions.
• Include measures to prevent habitat fragmentation, support fish populations, and minimize displacement of communities and economic activities.

Conclusion

This GPN provides sector-specific guidance to help private-sector companies in emerging markets effectively assess and manage EHS risks associated with hydropower projects. It encourages sustainable development, environmental stewardship, and community engagement, and highlights the importance of climate resilience, ecological balance, and operational safety in hydropower planning and execution.

Annexes

• Annex A: General description of industry activity.
• Annex B: Suggested aspects of an Environmental Impact Assessment (ESIA).
• Annex C: Assessment and provision of instream environmental flows (EFlows).
• Annex D: Glossary of terms.

References

The document references various international standards, guidelines, and organizations, including the International Commission on Large Dams (ICOLD), International Hydropower Association (IHA), International Union for the Conservation of Nature (IUCN), and World Bank Group (WBG) EHS guidelines.

This summary provides an overview of the environmental, health, and safety considerations in hydropower projects, emphasizing the need for comprehensive planning, stakeholder involvement, and adaptive management to ensure sustainable and responsible development.