基于组合赋权的改进尼梅罗指数法在地下水水质评价中的应用

Application of the Improved Nemerow Index Method Based on Combined Weights in Groundwater Quality Evaluation

针对传统尼梅罗指数法中单项组分评分值Fi不连续,以及过分突出各单项组分最大评分值Fmax的问题,以熵权法和二项系数法组合赋权的方式对尼梅罗指数法进行改进,并以彭州川西气田部分水质检测结果为基础进行水质评价。评价结果表明,改进的尼梅罗指数法解决了传统方法中Fi值不连续和过分突出Fmax的问题,评价结果符合实际且在5个水质级别中的分布更加连续、均匀。

In view of the problems that the single component score(Fi)in traditional Nemerow index method is not successive and each single component maximum score(Fmax)is excessively outstanding,in this paper,entropy weight method and binomial coefficient method are combined to improve the Nemerow index method and the water quality evaluation is conducted based on the water quality test results of Pengzhou West Sichuan gas field.The evaluation results show that the improved Nemerow index method solves the problem of Fi discontinuity and overemphasis on Fmax in the traditional method,and the evaluation results are in line with the reality and the distribution in the five water quality grades is more continuous and even.