俞塘2005年至2013年水质变化趋势分析

Analysis of Water Quality Variation Trend of Yutang River between 2005 and 2013

采用综合污染指数法,评价了俞塘2005年至2013年间在丰水期、平水期、枯水期和全年的水质达标情况,计算了主要污染物的污染负荷,得到了水质的时间变化特征。结果表明,2005年至2013年俞塘水质均超标,但总体水质呈改善趋势,水质以轻度污染为主;各主要污染物中,氨氮的污染负荷最大,五日生化需氧量和高锰酸盐指数的污染负荷最小。研究结果为俞塘的地表水水质监测和污染防治等工作提供了重要依据。

Standard reaching results of water quality of Yutang River were evaluated in high water period, common water period, low water period and whole year between 2005 and 2013 by using comprehensive pollution index. The pollution loads of main pollutants were calculated and temporal variation of water quality was analyzed. The results showed that the water quality of Yutang River was over standard, but the water quality was improved and it was slightly polluted between 2005 and 2013. In main pollutants, the pollution load of ammonia nitrogen was highest and the pollution loads of five day biochemical oxygen demand and permanganate index were lowest. The results would provide important reference for surface water quality monitoring, pollution prevention and control of Yutang River.