Strategies for city ecosystem restoration based on theories of urban plan

The mainstream methods of city ecosystem restoration whose subjects are primarily the factors from nature ecosystem are lack of the analysis to those factors from society ecosystem and economy ecosystem. The authors study this research by the methods of calculating the relevant datum and comparative analysis; introduce urban plan rationales into city ecosystem restoration, and put forward three strategies: First, the authors investigate the coupling relationship between the city spatial pattern and society ecosystem by "Space Growth Curve " and clarify how to rehabilitate the society ecosystem by adjusting the city spatial pattern; Second, the authors establish the three-level city landscape structure by "GIS Landscape Planning" and unify the management of nature ecosystem by landscape planning; At last, in order to optimize the city economy ecosystem, the authors contrive the city industry distribution by "SWOT". In responds to this situation, introducing technologies of urban plan into city ecosystem restoration may open up a new orientation to provide the systematic management. Furthermore, some methods which apply to unitary factor can be integrated organically as a chain.