综合水质指数法对长江沙市江段的水质评价

Water Quality Assessment in Shashi of the Yangtze River by Comprehensive Water Quality Index

利用长江干流沙市江段3个断面水质实测资料,采用综合水质指数法,对长江干流沙市江段3个断面1999年-2008年水质状况进行分析评价。根据综合水质指数法(WQI),得出沙市江段近期水质尚好,并根据单项指数的结果,找出了沙市江段近期水质影响最大的污染因子。结果表明,铅、粪大肠菌群、总磷是沙市江段的主要污染因子。

Based on the data of the water quality at three sections in Shashi of the Yangtze River from 1999 to 2008,using a reasonable and practical integrated pollution index,an analysis of water quality assessment is carried out.According to the Comprehensive Water Quality Index （WQI）,water quality in Shashi section of the river is still good.And based on the individual indices,the greatest influencing pollution factor on water quality was identified in the Shashi River section near future.The results showed that lead,fecal coliform,total phosphorus are the City＇s major pollution factors.