基于指数法和模糊综合评价法对盘龙铅锌矿区的水质分析与评价

Analysis and evaluation of water quality in Panlong lead-zinc mine based on index method and fuzzy comprehensive evaluation method

为了研究广西盘龙铅锌矿区水质污染情况,使用指数法和模糊综合评价法,分别对选取的12处地表水和14处地下水水质数据进行分析与评价。指数法结果表明:1处地表水监测断面的水质呈重度污染,主要污染因子为总磷、铁和锰,分别超出地表水Ⅲ类标准限值的3.27、2.31和5.84倍;1处地表水监测断面的水质呈轻度污染;其余监测断面的水质良好。模糊综合评价结果表明,矿区地下水水质在Ⅰ~Ⅲ类水范围,其中,42.86%的地下水水质为Ⅰ类水,18.75%的地下水水质为Ⅱ类水,31.25%的地下水水质为Ⅲ类水。Ⅲ类地下水主要分布在盘古和尾矿库周围,主要污染因子包括砷、铅和镉。

In order to study the water pollution situation of the Panlong lead-zinc mine area of Guangxi,the water quality data of 12 surface waters and 14 groundwaters were analyzed and evaluated using the index method and the fuzzy comprehensive evaluation method.The results of the index method show that the water quality of one surface water monitoring section is severely polluted,and the main pollution factors are total phosphorus,iron,and manganese,which are 3.27,2.31,and 5.84 times higher than the limit of surface waterⅢstandard,respectively.The water quality of one surface water monitoring section is slightly polluted.The water quality of other monitored sections is good.The results of the fuzzy comprehensive evaluation show that the groundwater quality of the mining area is in the range of classⅠ~Ⅲ,of which 42.86%,18.75%and 31.25%of the studied samples can be indexed to classⅠ,ⅡandⅢwater,respectively.ClassⅢgroundwater is mainly distributed around Pangu and tailings pond,and the main pollution factors include arsenic,lead,and cadmium.