改进的TOPSIS模型在地下水水质评价中的应用

地下水水质评价是保护水环境实现地下水资源可持续利用的重要基础工作。为了克服使用TOPSIS模型评价水质时常受到多指标决策的局限性,对原模型进行了两点改进:一是采用以主观赋权(AHP法)与客观赋权(熵权法)相结合确定组合权重;二是采用Kullback-Leibler距离代替传统方法中的欧式距离计算贴近度。利用改进后的TOPSIS模型,分别对邯郸市、焦作市地下水水质进行评价,评价结果分别与参考文献对比基本一致,表明改进后的TOPSIS模型,计算方法基本合理可行,具有一定的探索价值。

Application of Improved TOPSIS Model in the Comprehensive Evaluation of Groundwater Quality

Evaluation of groundwater quality is the basis for the protection of water environment and realization of sustainable utilization of groundwater resources.Using the TOPSIS model to evaluate groundwater quality is often limited by its drawbacks in multiple criteria decision making.In this paper,two improvements were performed to the TOPSIS model.One improvement was that subjective weight(AHP method) and objective weight(entropy value method) are used to determine combinatorial weights,and the other improvement was that the Kullback-Leibler distance instead of the traditional Euclidean distance is used to calculate the similarity degree.The improved TOPSIS model was applied to evaluate the groundwater quality in Handan city and Jiaozuo city,and the evaluation results were consistent with the referenced results,which indicated that the improved TOPSIS model is basically feasible and rational for the groundwater quality evaluation,and it is a worth-exploring method.