摘要
采用综合污染指数法对京杭大运河常州段近10 a水质的主要污染因子及其变化趋势进行了研究。结果表明:京杭大运河常州段水质不断提高,2013年水质达到Ⅳ类地表水标准,满足相应功能区划要求;中下游水质较上游明显下降,下游4个断面在2004年—2009年间部分水质指标超出Ⅳ类地表水标准,主要超标因子为NH3-N;不同水期水质变化显著,丰水期水质综合污染指数较小,平水期其次,枯水期最大。
This research used comprehensive pollution index to analyze the main pollution factors and their trends of this section and evaluate the water quality pollution of the section of Changzhou City of the Beijing-Hangzhou Grand Canal. The results show that the water quality at section of Changzhou City of the Beijing-Hangzhou Grand Canal enhances unceasingly and the status quo of water quality reached Ⅳ class value of surface water standard in 2013, which met the requirements of the corresponding function regionalization; compared with the water quality of upstream, the water quality of midstream and downstream decreased obviously and the main pollutant was ammonia nitrogen; the water quality changed significantly in different water period, the comprehensive pollution index in wet season was the smallest, followed by in the normal season and the comprehensive pollution index in dry season was the largest.
出处
《能源与节能》
2015年第4期91-94,共4页
Energy and Energy Conservation
基金
常州市科技项目(CE20125010)
国家重大水环境专项(No.2013ZX07501005)
关键词
水环境质量评价
综合污染指数法
京杭大运河
water environmental quality evaluation
comprehensive pollution index
the Beijing-Hangzhou Grand Canal
