基于模糊数学的矿业城市地表水污染风险评价

Risk Evaluation of Surface Water Pollution for Mining Cities Based on Fuzzy Mathematics

根据模糊数学方法，建立了水污染风险模糊综合评价数学模型，以煤炭资源型城市阜新为研究对象，选取辽河流域阜新段1996～2005年枯水期和丰水期水质状况平均值进行水污染风险评价。旨在定量分析评价阜新地区地表水环境质量现状和存在的问题。结果表明：辽河阜新段水质在1996～2005年间波动较大，呈水质日益恶化的状态。水体主要污染物为有机物、氨氮和溶解性铁，总体来说各污染物变化规律各不相同，总磷、BOD5、溶解性铁呈递增趋势，其他污染物质都呈波动性变化。

A fuzzy comprehensive evaluation mathematical model of water pollution risk was built according to the fuzzy mathematical method. Fuxin, a city with colliery resource, was taken as the research subject. The averages of water quality in Fuxin section of Liao River in low and high water season from 1996 to 2005 were adopted to evaluate water pollution risk. It aimed at quantitative analysis and evaluation of the environmental quality and existing problems of the surface water in Fuxin region. The result showed that the water quality of Liao River in Fuxin section fluctuated strongly from 1996 to 2005, with an increasingly deteriorated water quality. The main pollutants of the water body were organic matters, ammonia nitrogen and dissolved Fe. Generally, the pollutants changed in different ways, i.e. , total phosphorous, BOD5 and dissolved Fe increased gradually, while the level of other pollutants fluctuated.