治污工程对武汉东湖生态恢复的研究与探讨

通过对武汉东湖水域水质污染现状的调查 ,东湖已成为浮游植物响应型的城市富营养湖泊。对东湖入湖污水几乎全部截流 ,并通过长江补充新水 ,辅之换水 ,挖除部分底泥 ,污水处理 ,利用水浮莲的作用及生态调整等措施 ,湖水经大约 2 3～ 2 4a时间 ,随着东湖水质的改善 ,必将促进其水生生物的良性演替 ,使湖泊生态功能较迅速得以恢复 ,不断增进湖泊生态经济效益

Effect of Pollution Control Projects on Recovery of East Lake in Wuhan: Recent Advances and Future Trend

The environmental surveys carried out in recent years indicate that East Lake of Wuhan has become a eutrophicated lake due to pollution of sewage discharge. Pollution control projects implemented since last couple of years include interception and diversion of sewage, dredging sediments and transferring river water from the Yangtse River. According to the estimates referring to release of total phosphorus (TP) before and after the projects completion, it is expected that water quality of the lake will be ameliorated year by year, and approximately 24 years later the lake will recover in terms of water quality and eco system. This paper also suggests the supplementary measures like so called natural systems of hyacinth and other aquatic plants to enhance the lake water purification.