Research on dynamic mechanism and model of urban spatial expansion since the establishment of Chongqing Municipality
重庆市直辖以来的城市空间扩展与机制

In the paper,the author uses the growth index to attribute the urban spatial expansion intensity and the spatial difference, uses the incidence coefficient to portray the essential factor of the influence of urban spatial expansion mechanism, initially constructs an appraisal method of taking the city land use area (urban construction land + industrial construction land) as the dependent variable, taking the nature, the humanities, the society, the economy, the ecology as well as other factors as the independent variables to quantitatively reveal the city space dynamic evolution and its influencing mechanism. The diagnostic research of city space expansion in Chongqing after being directly under the Central Government for nearly 10 years indicated that, the Chongqing city's "pole nucleus" layout gradually developed into the 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 the 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 the economic level are the two major reasons accountable for the Chongqing city' s spatial expansion, The projects under the government guidance and the process of rural industrialization under market direction are the major influencing factors for Chongqing city's spatial expansion after the implementation of reform and opening up policy.