基于熵权物元可拓法的工业循环经济产业园地下水水质评价OA

At present,groundwater serves as the water intake source for 70%of China's population,and the available freshwater resources that can be directly exploited and utilized by humans are limited.Due to excessive exploitation and development by human beings,frequent problems such as water quality deterioration,resource shortage and ecological damage have occurred.Groundwater resources were greatly affected owing to their weak renewal capacity.It was obtained through comprehensive comparison and analysis that the calculation results of the entropy weight matter-element extension method were more accurate.Moreover,the extension index was enabled to reflect the quality of indicators within a standard interval more intuitively,and the variation trend of each monitoring indicator could also be judged.Accordingly,the entropy weight matter-element extension method was adopted to assess groundwater pollution in the circular economy industrial park.It was showed by the research results that the overall water quality of 121 monitoring wells in the study area was poor.The concentrations of Ca2+and Mg2+in water were excessively high,and a large area of high-hardness groundwater was detected.The over-standard rates of nitrite,sulfate and chloride all reached 100%.The total organic matter concentration of each monitoring well ranged from 0 to 248 005 mg/L,with an average concentration of 3 978 mg/L.Volatile phenol presented the largest concentration variation range,contributing 96.06%to groundwater pollution.Among all wells,the groundwater quality of 77 wells met Class Ⅱ standard,10 wells(accounting for 8.3%)reached Class Ⅲ standard,7 wells(accounting for 5.8%)fell into Class Ⅳ standard,and 27 wells(accounting for 22.3%)were classified as Class Ⅴ standard.No monitoring well achieved Class Ⅰ water quality.