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《Acta Scientiae Circumstantiae》 2006-02
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Watershed approach as a framework for lake-watershed pollution control

LIU Yong 1, GUO Huaicheng 1,*, ZHOU Feng 1, Wang Lijing 1,3, ZHANG Xiumin 2, HE Bin 2 1. College of Environmental Sciences, Peking University, Beijing 100871 2. Yunnan Institute of Environmental Science,Kunming 650034 3. Chinese Research Academy of Environmental Sciences, Beijing 100012  
Based on watershed characterization, watershed-protection principle, and landscape-ecology theory, a framework of watershed approach for water pollution control in a lake-watershed system is proposed in this study. The main procedures of the watershed approach include: (1) dividing watershed into sub-basins and forecasting pollutant load from each sub-basin to the lake; (2) designing pollution control strategies consisting of source prevention, process elimination, endpoint control and sink improvement; (3) recommending the desired comprehensive-pollution-control strategy; (4) calculating the reduction rate of pollutant load. The proposed method was applied to water pollution control for the Lake Qionghai Watershed in Sichuan Province, China. The watershed is divided into six sub-basins. TP loading from each basin to the lake in 2015 is predicted and analyzed. Based on the prediction results, water pollution control strategy, which mainly consists of soil-erosion prevention, point- and nonpoint-source control, river-channels ecological-restoration, and benthic-mud dredging, are recommended for the lake-watershed system. The reduction amount of TP under the recommended strategy is 22.5 tonne per year so that the target of environmental capacity can be reached.
【Fund】: 中国高技术研究发展计划(863)项目(No.2002AA601021);; 四川省西昌市人民政府资助项目~~
【CateGory Index】: X524
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