Studies On Ecosystem Health Assessment Of Metropolitan Area Of Chongqing

Ecosystem health is a new theroy that develop in late 80s of 20 century, which derived by the idea of sustainable development. A health ecology system contains two abilities: to suffice sober request of human society and to self-sustaining and renovate. Ecosystem health is a comprehensive theroy that studies on human activities, society organizations and nature systems. There is only a decade or more after the idea of ecosystem health was put forward. During this time, the study of ecology system often force on explore the concept and substance of ecosystem health, the method and index system to assess ecosystem health, to assess the health status of different types of ecology systems. In the past, the studies usually force on nature ecology system, such as marine ecosystems, forest ecosystems, and also include agro-ecosystems which under human management, whereas less studies on urban ecology system.Urban ecology system counties three subsystems: nature, economic and society. As it offers essential ecological services, the level of ecosystem health will finally impact on the level of humanhealth and affect the appropriateness of living Metropolitan area is the core of a city, the level of health of metropolitan area's ecosystem, will impact on the city's social and economic sustainable development directly. Metropolitan area plays an impotent part in the development of social and economic. By take a comprehensive evaluation of metropolitan area of Chongqing we can find out potential risks of the city's ecosystem and the causes of those problems, and then excogitate a way to adjust the city's ecosystem. It can provide the basis for metropolitan area of Chongqing's planning, alteration, development and management and make an important sense in lead the development of Chongqing in a logical, harmonious, sustainable way.The layout of this thesis includes six chapters. The introduction part is literature review, as for the emergence of ecosystem health theory, mainly introducing the backgrounds, concepts, contents of study, and assessing methodology and so on. It reviews the course of the theory's study and the hotpots of nowadays, then further discusses about its problem and developing way. The body parts of the thesis introduce the researching methodology and technical way, and construct the evaluating indices system of ecosystem health of metropolitan area of Chongqing by analyze the system by means of Analytic Hierarchy Process (AHP for short) after analyses of the area's actuality of nature, economic and social. Finally, aiming at comprehensively and comparatively analyzing the state of Ecosystem health of metropolitan area of Chongqing from 1997 to 2006(value once every two years). We propose to improve the strategies in environmental management, hope to provide decision-making basis for the Chongqing's urban construction and sustainable development and provide reference for other cities in ecosystem health assessment. Therefore, the thesis reaches the conclusions as follows:(1) According to the characteristics of urban ecosystem and metropolitan area of Chongqing's social, economic, environmental and other realities, constructed ecosystem health evaluation index system of metropolitan area of Chongqing. This evaluation index system contends three levels, include 37 indicators of vigor, organization, resilience, maintenance of ecosystem services, human health effects of the system. They fully reflect the connotation of the city's ecosystem health. Then we set the standard for the reference value by reference the corresponding index value at home and abroad. Formed a system of the city's ecosystem health assessment methods that including indicators, weight, evaluation criteria.(2) According to the metropolitan area of Chongqing's ecosystem health comprehensive assessment index system, using AHP, evaluated the ecosystem health of metropolitan area of Chongqing of 1997-2006 (to one year interval). The results show that the ecosystem health of the metropolitan area of Chongqing in was overall upward trend 1997 to 2006, but there are also problems such as uncoordinated development in individual indicators, and the growth rate of different index in subsystems were very different.. Then come to the result that the stress factors of metropolitan area of Chongqing,s ecosystem that limit it's ecosystem health are: GDP per capita, Green coverage, science and technology spending in financial, the proportion of tertiary industry in GDP, the number of health professionals per thousand people, the number of College Students per ten thousand people. Furthermore, some infrastructures that effect people's facilitation of life need to be enhanced.(3)The thesis hopes to provide scientific basis for planning for the development of Chongqing by analysis the state of ecosystem health of metropolitan area of Chongqing. This study prove measures for improving the ecological health of the metropolitan area of Chongqing, they are: promoting the urbanization reasonable, and regulate urban agriculture; softening of the economic structure, increase the technology content of industries; control population growth, building a good urban living environment; adhere the four projects of Blue Sky, Clear Water, Quite and Green, protect urban green space; strengthen urban management, conduct functions and organizations building of urban, make it orderly.