巢湖出入湖口的水质动态分析评价

Dynamic Analysis Evaluation of Water Quality in Inlet and Outlet of Chaohu Lake

为了对巢湖各出入湖口水质进行评价并分析污染变化趋势，根据2000～2007年巢湖9个主要出入湖口的8种污染指标监测结果，运用模糊综合评价方法评价了水质现状．并采用Spearman秩相关系数法分析了各出入湖口的水质变化趋势。结果表明，巢湖各出入湖口总体水质污染程度呈逐年减轻趋势，但污染均较为严重；十五里河希望桥处污染程度最高，各年污染综合指数均高于其他监测点。工业污水、生活废水等大量排放而导致的富营养化是引起巢湖污染的主要原因。

In order to assess the water quality and analyze its variation tendency of pollution for inlet and outlet of Chaohu Lake, based on the practical monitoring data and 8 main indicators of 9 inlets and outlets of Chaohu Lake in 2000-2007, the current situation of water quality is evaluated by using fuzzy comprehensive evaluation method. And the variation tendency of water quality is analyzed with Spearman rank correlation coefficient method. The results show that the water quality in inlet and outlet of Chaohu Lake is increasingly improved year by year but the pollution is also relative serious ~ the most serious area is Xiwangqiao in Shiwuli River and the comprehensive pollution indexes is higher than those of other monitoring stations; the contribution factor for pollution of Chaohu Lake is eutrophication, which is caused by plenty of industrial sewerage and domestic wastewater.