城市富营养化湖泊生态恢复—南京莫愁湖物理生态工程试验

在分析了太湖及其流域所面临的水环境质量问题及其原因基础上,回顾总结了“十五”太湖水环境治理经验,认为源头控制需要长期不懈的努力,太湖流域的湖泊治理要针对太湖平原河网与湖荡水系特色,要重视太湖东部草型湖区生态环境恶化的严重性,必须加强生态修复单项技术间的效应优化和有效集成．根据太湖流域的社会经济发展规划,提出了太湖流域水污染控制技术与水体生态修复工程示范的总体思路是:从污染源头到湖泊出口,依次通过污染源控制、河道截污、湖荡调节、河口净化、湖泊生态修复、出湖疏导等多道防线,有效促使太湖水环境向良性方向转化．在此基础上提出了具体实施建议:全流域污染源削减和太湖水源地典型水域生态修复技术集成与工程示范,同时进行全流域水环境治理强化管理政策与决策支持技术的研究与示范．

Ecological restoration of urban eutrophic lakes-a case study on the physical and ecological engineering in Lake Mochou, Nanjing

The situation of water environmental quality and its causation in Taihu Basin was analyzed. The experience of water environmental management in the 10 five-year project was summarized. It is proposed that pollutant source control be implemented for a long time. Management in Taihu Basin must consider the characteristics of its plains and network of waterway. The ponderance of typical macrophytic lake ecological deterioration should be recognized. We need to optimize each technique used in lake ecological restoration and emphasize on their combination. Based on social-economic development program in Taihu Basin, we put forward our strategic thinking for the control of pollution and water remediation in the future, which was implemented successively by pollutant source control, watercourse pollutant collection, small lake and marshes regulation, estuary intensity purification, lake ecological restoration, outflowing leading, et al. All these steps could accelerate the improvement of water quality in Taihu Basin. We proposed technique combination and project demonstration of whole basin pollutant reduction and ecological restoration of representative district of drinking water sources, and also suggested the development and demonstration of water environmental management policy and supported techniques.