Application of TOPSIS Model Based on Vague Set Entropy in the Evaluation of Groundwater Quality

Groundwater quality assessment had important guiding significance on sustainable use of groundwater resources. In order to avoid the subjective judgment on the weight of each index, this article used the Vague set entropy theory to determine the weight of each index, combined with the TOPSIS method, it established the TOPSIS groundwater quality evaluation model based on Vague set entroy. Finally, this model was applied to groundwater quality evaluation in Tailan River Irrigation District, the evaluation results matched with the actual situation. The results showed that the evaluation process of this model was reasonable and scientific, it provided a new idea for groundwater quality assessment.