本文關鍵詞： 灰色關聯(lián)評價法 糞大腸菌群 污染物分擔率 指標選取 水質評價　出處：《人民長江》2016年S2期 　論文類型：期刊論文

【摘要】：為了解和進一步研究長江水質狀況,選取其干流及部分支流宜賓-萬州共10個斷面,分析了2004~2013年的水質數(shù)據(jù),進行水質評價;另外,還分析了各斷面糞大腸菌群的時空變化規(guī)律。通過計算污染物分擔率并對其按得分排序,得到排名靠前的8項污染物:TP、CODMn、鉛、DO、氟化物、鎘、BOD5、氨氮;然后利用這8項指標采用灰色關聯(lián)評價法對該河段水質進行評價。結果顯示,大部分斷面水質均在Ⅲ類以上,宜賓、寸灘、臨江門、清溪場城區(qū)斷面水質稍差,但水質總體狀況有逐年轉好的趨勢。大部分斷面糞大腸菌群在2003,2006,2010年前后到達高點,分析其原因,可能與三峽蓄水、水溫、高錳酸鉀指數(shù)、總磷、BOD5有關。
[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，

本文編號：1461087