综合水质指数法对滴水湖水质的评价

摘要

正确认识和评价滴水湖水质的变化特征是进行水环境管理的前提.通过监测2006～2009年滴水湖水体溶解氧(DO)、高锰酸盐指数(CODMn)、五日生化需氧量(BOD5)、氨氮(NH3-N)以及总磷(TP)等5种主要污染因子的月度变化,利用综合水质污染指数法进行了比较评价.结果表明2006～2009年间滴水湖湖区整体水质已达到地表水Ⅳ类水标准((GB 3838-2002),水质状况有明显好转；有机污染物和总磷是滴水湖水体主要污染因子.%Correct understanding and evaluating the change of water quality in the Dishuihu Lake have great significance for pollution control. Based on monitoring the monthly changes of DO, CODmn, BOD5, NH3-N and TP in 2006~2009, comprehensive water quality index method was used to evaluate the water quality in Dishuihu Lake. The results show Dishuihu Lake's surface water quality in 2006?2009 meets GB 3838?002 Standard Class IV, water quality is significantly improved and organic pollutants and TP are main pollution factors in Dishuihu Lake.