Study On The Evaluation Of Urban Water Ecological Construction In Anhui Province Based On The Connection Number

Under the background of continuous economic and social development and the continuous prominent ecological environment problems,the urban water ecological environment deterioration,over exploitation of river and lake sand and stone,eutrophication of water body and other urban water ecological problems are becoming increasingly serious.These problems greatly hinder the high-quality development of economy and society and the further improvement of people’s living standards.The research on water ecology and related issues has become the front and hot spot of water science research.It is very important for the sustainable development of a city and the improvement of the living standard of residents.In order to explore a scientific and reasonable quantitative evaluation method for urban water ecological construction,based on the analysis of the current situation of urban water ecological construction in Anhui Province,the paper uses genetic fuzzy analytic hierarchy process to select the urban water ecological evaluation index system,constructs the urban water ecological construction evaluation model based on the number of connections,and quantitatively analyzes the status of urban water ecological construction in Anhui Province,The key factors restricting the urban water ecological construction in Anhui Province are identified by using the obstacle factor diagnosis and identification model,and the above methods are verified by examples in four representative cities in Anhui Province.The main research work and achievements of this paper are as follows:(1)Based on the study of natural geography,hydrogeology,population economy and other conditions in Anhui Province,this paper analyzes the influencing factors of urban water ecology,summarizes the main influencing factors of urban water ecology into five aspects,and analyzes the important water ecological problems in different cities in Anhui Province,so as to provide practical reference for the next quantitative evaluation of the current situation of urban water ecological construction.The fuzzy analytic hierarchy process based on accelerating genetic algorithm is applied to screen the evaluation index system,which effectively solves the problems of numerous and complicated index systems in the current evaluation process of urban water ecological construction,and it is difficult to select and apply to the evaluated City,highlights the importance of evaluation subsystem and index,and lays the foundation for the comprehensive evaluation of urban water ecological construction state.(2)In order to improve the rationality and reliability of the evaluation results of urban water ecological construction,the paper puts forward the comprehensive application of the method of connection number,grade characteristic value,attribute identification,weighted and score(Level eigenvalue-Attribute recognition-Weighted sum synthesis method based on Connection Number,LAW-CN)to evaluate the urban water ecological construction in Anhui Province.The application results in the four typical urban water ecological construction practice show the status of urban water ecological construction in Maanshan,Huaibei,Luan and Chizhou At present,they are in the basic harmony,more harmonious,harmonious and harmonious level state.The LAW-CN can make full use of the evaluation information of the standard coefficient between the sample of urban water ecological construction evaluation index and the evaluation standard grade,and solve the uncertainty between the evaluation index and the evaluation standard.The evaluation results of the current situation of water ecological construction in each city are clearly differentiated,the evaluation process is steady,the diagnosis analysis is reasonable,and the applicability is wide.It is used in other cities The state evaluation and diagnosis analysis are of great value in application.The difference coefficient I of the relation number expression of urban water ecological construction evaluation is simulated by trigonometric fuzzy number method,and the confidence interval is obtained under the condition of 0.05 confidence level.The results obtained by this method are stable in a range,which is more stable and objective than the other methods,and can be used in combination with different evaluation models.(3)In order to diagnose and identify the main influencing factors of urban water ecological construction in time,a diagnosis and identification model of urban water ecological construction obstacle factors based on connection number is proposed.29 evaluation indexes selected from Ma’anshan City,Huaibei City,Lu’an City and Chizhou City are used as the original diagnosis indexes,Through calculation and diagnosis,four obstacle factors of urban water ecological construction were identified: there are 27 obstacle factors in water ecological construction of Ma’anshan City,and the first obstacle factor is urban drainage standard rate;There are six obstacle factors in the construction of water ecology in Huaibei City.The first obstacle factor is the ornamental and water culture characteristics of water area and surrounding scenic spots;There are four obstacle factors for water ecological construction in Lu’an City,and the primary obstacle factor is the water consumption of ten thousand yuan GDP;There are four obstacle factors of water ecological construction in Chizhou City,and the first obstacle factor is the rate of restoration and control of the slash.Through the diagnosis,we can analyze the important obstacle factors in the water ecological construction of the city,which can provide technical support for the targeted and efficient treatment and construction of water ecology in the region.In conclusion,the application of the set pair analysis connection number method in the evaluation of urban water ecological construction has preliminarily explored its evaluation mechanism and the realization method of quantitative evaluation,and the evaluation results have a high degree of agreement with the actual situation of the region,which has a good applicability and application prospect in the evaluation of urban water ecological construction.