Urban Water Supply Safety Evaluation Based on Combination Weighting-Set Pair Analysis
In order to evaluate the safety of urban water supply more accurately,combination of set-pair analysis and subjective-objective combination assignment method was used to establish a regional urban water supply safety evaluation model.Using the principle of minimum relative information entropy to determine the comprehensive weights of the indi-cators and coupling into the linkage degree of the indicators,the evaluation system of urban water supply safety based combination weighting and set pair analysis was established.Finally,the urban water supply safety level was determined by the five-variable subtraction set pair potential.Taking Kunming City as an example,the evaluation of its water supply safety from 2011 to 2020 is divided into safety levels.The results show that the Kunming City from 2011 to 2013 is in the safety level,of which 2011 and 2012 are more inclined to the basic safety level;From 2014 to 2020,it is in the very safe level but is more inclined to the safe level,and the state of water supply is relatively safe and stable.This method solves the problem of uncertainty and multi-indicator in the evaluation of urban water supply safety to a certain extent,and pro-vides a new way for evaluation of urban water supply safety.
urban water supplysafety evaluationfive-variable subtraction set pair potentialset pair analysiscom-bination weighting
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