Study On Evaluation System Of Urban Drinking Water Security Scheme Based On Cloud Model

With the gradual expansion of urban population scale,urban water consumption is gradually increasing,and the existing water supply capacity of cities has fallen far behind the growth rate of urban water demand.In the context of continuous water pollution,rational distribution of available water resources is the only way to sustainable development.In the context of continuous water pollution,rational distribution of available water resources is the only way to sustainable development.The establishment of the evaluation system of urban drinking water safety guarantee scheme and the optimization of urban drinking water safety guarantee scheme can not only make full use of various existing water sources,alleviate water resource crisis,but also rationalize the distribution of water supply system.This study aims at solving the contradiction between the supply and demand of urban water resources,and studies the evaluation system of urban drinking water security from the perspective of rational allocation of water resources.Based on improved g1-entropy weight method,a set of evaluation cloud model of urban drinking water safety assurance scheme was constructed and visualized.Finally,wenjiang district of chengdu is taken as an example to study.The main contents and achievements of this study are as follows:(1)The evaluation index system of urban drinking water security was established Through literature review,research on relevant laws and regulations,and combining with the characteristics of urban drinking water sources,an evaluation index system of urban drinking water safety assurance was established with 5 criterion layers,10 indicator layers and 27 evaluation layers.The 5 criteria include water quantity,water quality,environmental management,risk and emergency,construction and operation.The system improved the way water quality and risk sources were evaluated,and the results were more in line with the actual situation.(2)The evaluation cloud model of urban drinking water security scheme is constructed This research adopts the improved G1-entropy weight method,the cloud features,3 En principle combined with the optimized cloud model,to evaluate urban drinking water security scheme.Through the comparison between the alternative integrated cloud and the five-level standard cloud,the alternative was selected.The optimized model reduces the difficulty of calculation,limits the fuzziness of subjective evaluation,and makes the evaluation result more scientific.(3)The evaluation system of urban drinking water security scheme was developed.In this study,Visual Studio 2017 software was used to program and develop the evaluation system of urban drinking water safety assurance scheme.The system can directly output the evaluation cloud map according to the input data,and the evaluation process can be visualized and highly efficient,which improves the practicability of the evaluation cloud model of the urban drinking water security scheme.(4)An example is given to verify the evaluation model of urban drinking water security scheme.The evaluation model established in this study was used to evaluate the drinking water security scheme in wenjiang district.According to the model,the cloud number characteristics of the four alternatives were determined as(60.22,7.11,0.27),(76.16,5.72,0.21),(66.03,5.92,0.22),(81.85,4.24,0.13),and their advantages and disadvantages were ranked as: plan 4 > plan 2 > plan 3 > plan 1.Scheme 4 is the best choice among the four schemes in terms of safety evaluation value,reliability of evaluation results and stability of evaluation results.