上海淀浦河水质评价及成因分析

Water Quality Evaluation and Cause Analysis of Shanghai Dianpu River

采用单因子评价和内梅罗综合污染指数法对上海市淀浦河枯丰水期的水质进行评价。结果表明:淀浦河枯水期七莘路断面未达到水质目标,南港大桥和七莘路断面在丰水期未达到水质目标。枯水期内梅罗综合污染指数大于枯水期,总体上枯水期的水质较差于丰水期。河道沿程水质依次变差,其中下游七莘路断面的水质最差,与水质功能区目标相差较大。通过主成分分析法初步识别出淀浦河的水质污染源为农业面源污染和城市生产生活的综合污染源,农业面源污染的主要贡献因子为TP、NH_(3)-N、EC和浊度,城市生产生活污染源的主要贡献因子为EC、COD_(Mn)和DO。

In this paper,single factor evaluation and Nemerow comprehensive pollution index method were used to evaluate the water quality of Dianpu River in Shanghai in dry and wet seasons.The results of single factor evaluation showed that the Qishen Road section of Dianpu River did not meet the water quality target in dry season,and the Nangang Bridge and Qishen Road section did not meet the water quality target in wet season.The Nemerow comprehensive pollution index in dry season is greater than that in dry season,and the water quality in dry season is worse than that in wet season.The water quality along the river becomes worse,and the water quality of the downstream Qishen Road section is the worst,which is quite different from the target of the water quality functional area.Through principal component analysis,it is preliminarily identified that the water pollution source of Dianpu River is the comprehensive pollution source of agricultural non-point source pollution and urban production and life.TP,NH_(3)-N,EC and turbidity are the main contribution factors of agricultural non-point source pollution,and EC,COD_(Mn) and DO are the main contribution factors of urban production and life pollution sources.