A Method for Evaluating Happy Rivers and Lakes Based on Connection Numbers and Trapezoidal Fuzzy Numbers:Taking Puyang River in Zhuji City as an Example
In order to scientifically and reasonably evaluate the happiness status of regional rivers and lakes,a"happy river and lake"evaluation method based on connection numbers and trapezoidal fuzzy numbers was proposed.Firstly,an evaluation index system was constructed based on the four subsystems of safety and stability,effective supply,ecological health,and harmonious intelligence for the evaluation of happy rivers and lakes.Secondly,the evaluation level standards for evaluation indicators were determined,using the genetic analytic hierarchy process to calculate the weights of each evaluation indicator.Finally,a happy river and lake evaluation model(HRL-CNTFN)based on connection numbers and trapezoidal fuzzy numbers was constructed.The model was applied to the evaluation of three sections of Puyang River in Zhuji City in 2022,and the results showed that in 2022,the evaluation results of the upstream,urban,and downstream sections of Puyang River were level 1(happiness).The happiness level of the urban section of Puyang River was better than that of the upstream section,and the upstream section was better than that of the downstream section.The evaluation results are the likelihood values of corresponding evaluation levels for each district,describing the objective situation of uncertainty in the evaluation results,indicating that the HRL-CNTFN model has certain practical application value in the quantitative evaluation of regional happy rivers and lakes.
happy river and lakeconnection numbertrapezoidal fuzzy numberPuyang River
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