Study On Sustainability Evalution Of Urban Water System In Jinan City

With the acceleration of urbanization process,great changes have taken place in the industrial structure of cities,which result in tremendous changes in the structure of urban water use,and more and more problems of urban water system.This paper chooses the urban areas(Lixia District,Shizhong District,Tianqiao District and Huaiyin District)and Licheng District which obvious Urbanization Characteristics in Jinan City as the research objects,and chooses the five years from 2013 to 2017 as the evaluation base year for the evaluation of sustainability.In this paper,the DPSIR is selected as evaluation model to evaluate the sustainability of Jinan urban water system.The urban water system is divided into water supply system,drainage system,water ecosystem and water management system.Based on the characteristics of DPSIR model and the five factors of "Driving forcePressure-State-Impact-Response",combined with hydrometeorology,social culture and economic conditions in the study area,and based on the sustainability evaluation objective of urban water system,the indexes of the four subsystems are screened and available.The sustainability evaluation index system is builtFor the selected indicators,there is a situation of unit inconsistency.In this paper,the coefficient of variation method and improved entropy value method are selected to normalize the indicators and determine the weight at the same time.Analysis of the advantages and disadvantages of the variation coefficient method and the improved entropy method,the method of combination of coefficient of variation and improved entropy is selected to carry out the weight of the four subsystems.At the same time,the weight of each subsystem of the integrated urban water system is determined by the comprehensive index method.When evaluating the urban water system of Jinan City,the interannual sustainability of the four subsystems is evaluated and analyzed from the five levels of "Driving force-Pressure-State-Impact-Response".That the similarities and differences between urban areas and Licheng District are compared,it has guiding significance for the sustainable development of urban water system of Jinan City.At the same time,the main function system of urban water system is determined by comprehensive analysis in different criterion layers.And leading systems of urban water system are determined,according to the intuitive characteristics of radar maps.It can be inferred that integrated urban water system is based on the main system of "Driving force-Pressure-StateImpact-Response" in different years,which has a good guiding significance for the sustainable development of urban water system.