基于熵权的集对分析方法在地下水脆弱性评价中的应用

Application of the set pair analysis based on entropy and weight to the vulnerability assessment of groundwater

针对传统集对分析在评价地下水脆弱性时认为各指标权重相同的缺点,以DRASTIC模型指标体系作为基础,将熵值理论与集对分析相结合,在集对分析中使用熵值法确定权重系数,对地下水脆弱性进行了评价,实现了特性权重随样本数据的动态变化。应用实例表明,该方法评价地下水脆弱性能够充分反映样本数据本身对指标权重的影响,评价结果更加客观、可靠。

Aiming at the disadvantages of the traditional set pair analysis method with the same weight of the indices in the assessment of groundwater vulnerability,based on the index system of DRASTIC model, the entropy theory and the set pair analysis are combined,and the weight coefficients are determined by using entropy method to evaluate the groundwater vulnerability. The method achieves the dynamic changes that make the weight of the indices follow the sample data. The application results show that the method could reflect the influence of sample data to the weights of indices in the assessment of groundwater vulnerability,and the assessment results are more objective and reliable.