基于因子分析的TOPSIS法改进对浅层地下水综合评价

地下水综合评价是一种兼具绝对性、相对性和多指标性的一种综合评价法,在评价过程中存在相关性或多重共线性问题。先通过因子分析来克服相关性或多重共线性,再通过对TOPSIS方法的改进和拓展(加权欧氏距离平方的TOPSIS法)来达到兼具绝对性与相对性综合评价的要求,可以使评价结果更为客观。以福建省晋江市浅层地下水为验证研究区来阐述评价方法的实施过程和效果,并通过地统计法中的Kriging插值实现评价结果可视化。评价结果显示晋江市浅层地下水水质整体处于良好水平,可为合理保护和利用浅层地下水提供决策依据。

Comprehensive Evaluation of Shallow Groundwater Using Improved TOPSIS Method Based on Factor Analysis

The comprehensive evaluation method for groundwater is both absolute and relative with multiple indexes .There are corre-lation and multi-collinearity problems in the evaluation process .So the comprehensive evaluation result of the groundwater can be made more objective by overcoming the correlation and multi-collinearity problems through factor analysis and meeting the require-ment of having both absoluteness and relativity through the improvement of TOPSIS method .This paper expounds the implementa-tion process and the effect of the evaluation method by choosing the shallow layer groundwater in Jinjiang City of Fujian Province as the validation study area and visualizes the evaluation results with the Kriging interpolation .The evaluation results show that the shallow layer groundwater in Jinjiang City is overall in good level .The study results can be used as the decision basis for the protec-tion and utilization of shallow layer groundwater .