Optimal selection and analysis of groundwater quality evaluation methods:A case study in the Hutuo River alluvial pluvial fan

Taking the Hutuo River alluvial pluvial fan for example,in contrast to the fuzzy mathematics method,the Nemerow method is significantly affected by extreme values while trace indexes are of higher proportion.Since the weights of evaluation indexes are neglected,the physical meaning of evaluation results is hard to define.So we can conclude that the Nemerow method is not suitable for evaluation of multiple indexes.As the weights of the indexes’are considered and membership degree is used to defin...