灰色关联法在长江宜宾-万州段水质评价的应用

发布时间：2018-01-24 21:37

  本文关键词： 灰色关联评价法 粪大肠菌群 污染物分担率 指标选取 水质评价　出处：《人民长江》2016年S2期 　论文类型：期刊论文

【摘要】：为了解和进一步研究长江水质状况,选取其干流及部分支流宜宾-万州共10个断面,分析了2004~2013年的水质数据,进行水质评价;另外,还分析了各断面粪大肠菌群的时空变化规律。通过计算污染物分担率并对其按得分排序,得到排名靠前的8项污染物:TP、CODMn、铅、DO、氟化物、镉、BOD5、氨氮;然后利用这8项指标采用灰色关联评价法对该河段水质进行评价。结果显示,大部分断面水质均在Ⅲ类以上,宜宾、寸滩、临江门、清溪场城区断面水质稍差,但水质总体状况有逐年转好的趋势。大部分断面粪大肠菌群在2003,2006,2010年前后到达高点,分析其原因,可能与三峡蓄水、水温、高锰酸钾指数、总磷、BOD5有关。
[Abstract]:In order to understand and further study the water quality of the Yangtze River, the water quality data from 2004 to 2013 were analyzed and the water quality was evaluated by selecting 10 sections of the main stream and some tributaries of Yibin-Wanzhou. In addition, the temporal and spatial variation of fecal coliform bacteria in each section was analyzed. By calculating the pollutant sharing rate and ranking it according to the score, we got the top 8 pollutants: TPN, CODMn, Pb-DO. Fluoride, cadmium Bod 5, ammonia nitrogen; Then the water quality of the reach was evaluated by using the grey correlation evaluation method. The results showed that the water quality of most of the sections was above class 鈪，

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