基于单因子水质标识指数法的赋石水库流域河流高锰酸钾指数(COD_(Mn))分析

Analysis on COD_(Mn) in Fushi Reservoir Watershed Based on Single Factor Water Quality Identification Index Method

采用单因子水质标识指数法，以高锰酸钾指数（CODMn）为评价指标，对2009年7月～2011年6月浙江省安吉县赋石水库流域河流水质进行评价。结果表明，2009年7月～2010年6月该流域河流水体主要为I类和Ⅱ类水；2010年7月～2011年6月主要为V类水。按照达到前3类水的比例，干流（西溪）水质好于支流，西溪支流水质好于赋石水库支流。该流域有机污染物主要来自于农业非点源污染和生活生产资料废弃物，2010年7月以后该流域由于面源污染导致水质出现恶化，需要加强对面源污染的管控。

By using single factor water quality identification index method, with CODMn as an evaluation indicator, the water quality of Fushi Reservoir watershed in Anti County, Zhejiang Province during Jul. 2009-Jun. 2011 was evaluated. 3＂he results showed that the water quality was between grade I and grade [[ from July in 2009 to June in 2010, and was grade V from July in 2010 to June in 2010. The water quality in Xixi River was better than it＇s tributary, and the tributary of Xixi was better than tributary of Fushi Reservoir based on the grade m water quality standards, In this watershed, the main organic pollutions in water were come from agricultural non-point source pollution and water liquid and solid waste in lives and works. ？d＇ter July in 2010, the water quality has degraded by the non-point source pollution, so it is necessary to strength- en management and control for non-point source pollution.