关键词: 水质评价； 污染源解析； 综合水质标识指数法； 因子分析法； 阜阳市, 淮河

Abstract: The pollution of surface water in Fuyang, Anhui Province was still serious in recent years, and the composition and origin of pollution sources were still unknown. 6 rivers including the Yinghe River, the Quanhe River, the Cihuai River, the Huaihe River, the Heici River and the Guhe River in Fuyang City were selected as the research objects. 34 water samples were collected during the wet season and dry season respectively. The water pollution characteristics and sources were analyzed through the integrated water quality identification index method and principal component analysis method. The results showed that: (1) CODCr (CODMn), TN and TP were main pollutants in Fuyang City, and the risk of eutrophication was high. (2) The comprehensive water quality evaluation of different rivers showed that, the Yinghe River generally presented IV type water, there was a trend of improvement from upstream to downstream; the water quality of the Cihuai River drinking water protection zone was better. However, the pollution of the upper Heici River was heavier, which was mainly related to the direct rain and pollution discharge of tributaries. (3) Factor analysis showed that, the sources of pollutants in the Yinghe River and the Quanhe River were mainly agricultural non-point sources pollution, domestic and industrial sewage discharge. The research results provided a scientific basis for controlling pollution sources and water environmental safety in Fuyang City.

Key words: water quality evaluation, pollution source analysis, integrated water quality identification index method, factor analysis method , Fuyang City, Huaihe River