清水江流域水质污染现状评价及趋势分析

Evaluation of current water quality and changing trend of Qingshui Jiang River basin

通过单项污染指数法和综合污染指数法,对2006—2011年贵州省清水江省控断面监测数据进行分析,评价期间水质变化趋势及目前的水质状况。结果表明:实施污染防治规划以来,清水江流域水质得到显著的好转,但流域内省控断面总磷仍超标;氟化物除在重安江大桥和湾水断面略有超标外,其余断面均未超标;氨氮总体控制较好,所有省控断面均未超标。

This paper analyzed the monitoring data in sections of the Qingshui Jiang fiver basin, and used the Single pollution index and pollution index method to evaluate the change trend and present condition of water quality from 2006 to 2011. The results showed that since the implementation of pollution control plan, the general water quality of the Qingshui Jiang fiver basin has been remarkably improved. Except that total phosphorus in provincial control sections exceeded, and flu- oride in Chongan Jiang Bridge and Wanshui sections slightly exceeded the standard limits, the rest including ammonia nitrogen in all provincial control sections can meet the standards.