Guided Studies On The Physical Ecoevaluation In Urban Expansion--Take Wuxi As An Example

With the development of urban economy increase of urban quantity and constant growth of urban population, Impel the constant enlargement of the city scale , these must require city more expanding to the natural space constantly. Because people often care nothing but economic worth of environmental resources, and forget the intrinsic ecology meaning of environments that mankind depend on for existence. Cause city develop give an serious impact to environment more and more,then produce the result of deterioration of the environment. That is to say, ecological environment questions of city are to a great extent because of city unreasonable development and unreasonable environmental resources utilizing.In order to reach city and environment develop harmoniously , we shoud know what are the environment ecological function and how influen between the expand of city and environment each other, Then could coordinate this contradiction with a definite target.The article proceeds with these basic problems. From epistemology aspect, analyse the coupling relation between city and environment; From methodology aspect, adjust and control the production, life and ecological service function of the city, And from the technological means aspect, apply the ecology principle to urban planning and construction, By promoting the city and regional ecological system coordinated development with nature.The thesis is described from five parts.Part 1 : First, from the history cause, tell us the forming, evolution and develops of city which are height reliance to natural environment ,such as land, fresh water and mineral energy ; Second, from the current situation cause, expound the fact this kind of reliance slacken with economic development and innovation of technology. But the environment perturbation of urban evolution aggravate constantly, environmental question outstanding constantly. Prove synthetically that the city expands lead the interaction between people and environmental enlargement and promotion. Then put forward the ecology lead targets of " human living impact on ecological reduce to smallest extent".Part 2 : Expansion of the question. Mainly Describe all respects of the naturally ecological appraisal, point out the concept, content the method, and the principle of Choice ecological factor, Summarize the feedback of the relevant theory at the sametime.Part 3 : The paper set out From big system and coordination View, Use the systematic dynamics method to analyse all-sidedly that the city expands the relation with various kinds of ecological factors , And natural factor discern mode of city develop, point out city ecological problems are production by improper use the environment ecological factor during city expand, it Cause the problems production ,such as the function of natural system disappearance or lose efficiency; systematic circulation obstruct, material energy transform efficiency being low,and so on.Part 4 : Proceed from origin of the question , explain three concrete method include: ecological environment serve value district and ecological environment sensitizing range protection-, suitabl Land use for city expands; recovery the highly Environmental value area of which benn destroied.Propose the ecological guiding application procedure as: Ecological investigation-->Diagnose systematically Making the goal --> Related technical design--> Comprehensive appraisal-->The ecology adjusting and controlPart 5 : Application of the theory method . With the concrete instance 梂uxi city, show theory application course and Its finally result.