长沙市浏阳河水功能区水质评价及达标分析

Water quality evaluation of water function zones of Liuyang River in Changsha City and compliance rate analysis

以2017年长沙市全年水质监测数据为依据,采用单因子评价法、平均污染指数法对长沙市浏阳河水功能区水质现状进行了评价,并依据功能区水质目标进行了达标评价分析。基于2008~2017年连续10 a的水质监测数据,通过平均污染指数法对水功能区的水质变化趋势进行了分析。结果表明:近10 a来长沙市浏阳河水功能区水质整体较好,水质综合污染指数呈现下降趋势,由轻污染转至尚清洁。2017年长沙市浏阳河水功能区水质达标率达100%。

The status quo of water quality of water function zones of Liuyang River in Changsha City was evaluated by using single factor evaluation method and average pollution index method on the basis of water quality monitoring data of 2017 and the compliance rate of water quality of water function zones was analyzed according to the water quality protection target.The variation trend of water quality of water function zones was analyzed by average pollu⁃tion index method on the basis of 10 years of consecutive water quality monitoring data from 2008 to 2017.The re⁃sults showed that the water quality of water function zones of Liuyang River was good over the last 10 years,with the comprehensive pollution index declining.The water quality was changed from mild polluted to relatively clean.The compliance rate of water quality of the water function zones was 100%.