熵权法在煤矿区地表水环境质量评价中的应用

Application of Entropy Weight Method in Environmental Quality Assessment of Surface Water in Coal Mine Affected Area

为了研究煤矿开采对地表水环境质量的影响,以芦岭矿区5个塌陷塘(1#、2#、3#、4#、5#)以及流经矿区的沱河为研究对象,选取氨氮、总氮、总磷、化学需氧量、氟化物、硝酸盐、硫酸盐为评价指标,运用熵权法对矿区内地表水体进行了水环境质量评价。结果表明:沱河Ⅳ类水占100%;4#塌陷塘水质最好,可以作为生活用水;2#塌陷塘水质最差,有3个水样超过Ⅴ类标准;1#及5#塌陷塘为Ⅳ类水,3#塌陷塘为Ⅴ类水。总体上看,处于流动状态的沱河水质优于静水环境下的塌陷塘。

In order to study the environmental quality of surface water in coal mining affected area,this paper takes five collapse ponds(1#,2#,3#,4#,5#)in Luling mining area and Tuohe river flowing through the mining area as the research object,selects ammonia nitrogen,total nitrogen,total phosphorus,chemical oxygen demand,fluoride,ni⁃trate,sulfate as evaluation indexes,and uses entropy weight method to evaluate the water environmental quality of surface water in the mining area.The results show that:Tuohe River class IV water accounts for 100%;the water quality of No.4 collapse pond is the best,which can be used as domestic water;the water quality of No.2 collapse pond is the worst,with three water samples exceeding class V standard;No.1 and No.5 collapse pond is class IV wa⁃ter,and No.3 collapse pond is class V water.Generally speaking,the water quality of Tuohe River in flowing state is better than that of collapse pond in still water environment.