吕梁市三川河水质分析评价

Analysis and evaluation of water quality of Sanchuan River in Luliang City

采用单因子评价法和综合污染指数法,对三川河四个水质监测断面2015-2019年水质情况进行了分析。结果表明:三川河上游河段水质较好,均达到了Ⅲ类及以上;中下游河段水质较差,水体水质多为劣Ⅴ类,水体污染严重。从污染指数年际变化分析可知,水体水质总体上呈明显好转趋势。

The single factor evaluation method and comprehensive pollution index method were used to analyze the water quality of four water quality monitoring sections of Sanchuan River from 2015 to 2019.The results show that the water quality of the upper reaches of the Sanchuan River is good,reaching class III or above,while the water quality of the middle and lower reaches is poor.The water quality of the middle and lower reaches is mostly worse than Class V,and the water pollution is serious.However,according to the analysis of the interannual change of pollution index,the water quality of the whole river is obviously improving.