钱塘江流域杭州段水功能区水质现状与分析

Analysis of present situation and variation tendency of water quality of the water functionzonings of the main stream of Qiantang River in Hangzhou

对钱塘江流域干流杭州段11个水功能区的水质现状进行评价,结合2004~2013年共计10年的监测数据,对水功能区进行了水质趋势分析。分析表明,2013年钱塘江流域干流杭州段水质状况总体表现优异,仅在个别断面发现有总磷超出目标水质要求的现象。近10年各水功能区水质整体呈向好趋势,仅少量断面仍有少数指标有明显的变差情况。同时指出影响这些水功能区水质的主要因素,并提出了相应的建议。

The water quality and its variationtendencyofeleven water function zonings of the main stream of Qiantang River in Hangzhou was analyzed and evaluated with ten years＇ monitoring data from 2004 to 2013. The results showed that the overall water quality of Qiantang River in Hangzhou was good in 2013. Only TP of some individual monitoring sections exceeded the monitoring target of these water function zonings.Analysis of the trend of the water quality of water function zonings in recent 10 years showed that ithas an overall tendency for the better, but a few monitoring indexes still have obvious worsening variations. At the same time, the main factors affecting the water quality were pointed out, and the corresponding proposals have been put forward.