地下水质量模糊综合评判法的改进与应用

Improvement and Application of Fuzzy Synthetic Evaluation of Groundwater Quality

基于传统模糊综合评判法原理,针对其在实际应用中暴露出的弊端,分别在评价因子选择、权重确定、算子选择和综合评判结果向量分析等环节采用了累积频率法、修正的聚类权法、加权平均型算子和级别特征值法,建立了一种改进的模糊综合评判模型.应用该模型对大沽河水源地地下水质量进行了综合评价.结果表明:有近70%的监测井达不到生活饮用水要求,其水质主要为偏Ⅳ类水;有30.43%的监测井水质等级全部处于2.50~3.00之间,也应当引起警惕.通过与《中华人民共和国地下水质量标准》(GB/T 14848-93)推荐方法的比较,验证了本文提出的改进模型的可靠性和优越性.

Based on the traditional fuzzy synthetic evaluation theory,a new model was developed to overcome the limitations of traditional model in practice.In the procedures of selecting assessment indices,calculating weighted values,choosing fuzzy synthetic operator and analyzing object vectors of fuzzy synthetic evaluation,the methods of cumulative frequency,modified clustering weight,weighting average operator and level eigenvalue were proposed,respectively.Finally,a case study of groundwater quality assessment us...