Index System And Empirical Study Of Sustainable Development Of Urban Ecosystem

With the continuing fast development of world economy, the population explosion and the accelerating process of urbanization, a series of problems of urban ecological environment thus occurred. These problems has seriously threatened the existence and development of urban residents. Experts and scholars at home and abroad has made comprehensive study from different subjects and viewpoints. Based on these studies and in view of characteristics of city in our country, this thesis makes thorough study on sustainable development of urban ecosystem, puts forward the index system and model of assessment of urban ecosystem.This thesis consists of four chapters. The first chapter gives a general overview of urban ecosystem. It mainly involves the functions, the structures and the characteristics of urban ecosystem. It puts emphasis of analysis on the disequilibrium of urban ecosystem concerning its current situation and its influence factors.The second chapter mainly constructs the assessment index system and the assessment model of sustainable development of urban ecosystem from three aspects. Firstly it presents a summary of sustainable development of urban ecosystem and a comparison between cities at home and abroad. And then it deals with the related problems of assessment index system of sustainable development of urban ecosystem, including the construction of assessment system of urban ecological security, the sustainable development capability, the coordination between urban economy and urban ecological environment.The third chapter makes an assessment on sustainable development of urban ecosystem of Qingdao city, including its status of economic development, energy consumption, ecological environment, the evaluation on Qingdao's ecological security, the coordination between economy and eco-environment, and the sustainable development capability. Such analysis on Qingdao eco-environment is conducted in five aspects from different point of view in the form of graphs and by the method of comparative analysis. The assessment index system of sustainable development of urban ecosystem constructed in chapter two is also used to make empirical analysis. Regarding the assessment of Qingdao's ecological security , this thesis determines the weight of different index by the method of entropy, gives an overall evaluation by synthetical index method. Regarding the assessment of Qingdao's coordination between economy and eco-environment, this thesis determines the weight of different index by the method of Analytic Hierarchy Process, and determines the coordinated development degree by synthetical index method. Factor analysis method is used to evaluate each subsystem during all assessment.The forth chapter puts forward some suggestions on sustainable development of urban ecosystem in terms of our country, local government and the enterprise.The innovation of this thesis is as the following:⑴This thesis constructs an assessment system of the sustainable development capability of urban ecosystem. It makes whole assessment on the sustainable development capability of urban ecosystem and analyzes each subsystem to find main factor by the method of factor analysis.⑵This thesis constructs an assessment system of urban ecological security by the way of determining the weight of different index by the method of entropy, giving an overall evaluation by synthetical index method, evaluating each subsystem and finding the main factor by factor analysis method.⑶This thesis constructs an assessment system of coordination degree between urban economy and eco-environment by the way of determining the weight of different index by Analytic Hierarchy Process, evaluating by synthetical index method, analyzing each subsystem by factor analysis method.⑷The method of"positive-going of negative index"is introduced to solve the problem of weakening interaction between positive index and negative index in factor assessment for the first time.The assessment of sustainable development of urban ecosystem is the focal point of academic research. It's also the difficult point of ecology research. The key problem is how to determine a scientific and applicable assessment system. This thesis makes a meaningful trial in this way.