Research on dynamic mechanism and model of urban spatial expansion since the establishment of Chongqing Municipality

In paper,the author uses growth index to attribute urban spatial expansion intensity and spatial difference,uses incidence coefficient to portray essential factor of influence of urban spatial expansion mechanism,initially constructs an appraisal method of taking city land use area(urban construction land + industrial construction land) as dependent variable,taking nature,the humanities,the society,the economy,the ecology as well as other factors as independent variables to quantitatively reveal city space dynamic evolution and its influencing mechanism.The diagnostic research of city space expansion in Chongqing after being directly under Central Government for nearly 10 years indicated that,the Chongqing city's pole nucleus layout gradually developed into duplicate suitable spatial pattern by the centralized concentric circle type and the dispersible group type.From 1998 to 2004,the increasing urban construction sites of urban expansion played dominant role,with urban residential land expansion index reaching 0.0504,being more than three times that of industrial construction in terms of annual average expansion rate.The unceasing enhancement consumption level of and continuing development of economic level are two major reasons accountable for Chongqing city′s spatial expansion,The projects under government guidance and process of rural industrialization under market direction are major influencing factors for Chongqing city′s spatial expansion after implementation of reform and opening up policy.