The Research On Defining Of Hezheng Urban Planning Area

Reform and opening up three decades, China’s economic and social level and overall national strength have been significantly improved, at the same time, the development of city construction has achieved great success, a significant increase in the level of urbanization, like other developed capitalist countries, city expansion, spread phenomenon in China is gradually revealed. At present our country towns in the overall planning of the planning area also appeared larger trend, four municipalities directly under the central government’s overall planning has been done within their jurisdictions full coverage. City planning area is reasonable will directly influence the development of city, range over the general the scope of urban center the city zone to boost the rapid expansion, increase construction to use the total amount of land, the destruction of the city surrounding ecological environment, but also causing infrastructure waste and management of difficult situations, city planning area is too small will restrict the development of city.This paper first described the phenomenon of urban land excessive expansion by China’s rapid urbanization. Explain the purpose and significance of the study, through the introduction of UGB to quantitatively determine the planning area can be increased to delineate the planning area of the technical, scientific, and guide the rational development of urban space. Connotation of urban growth boundaries at home and abroad, management ideas and the means of achieving are an in-depth analyzed and summarized. And aimed at our country planning area concept, to delineate the manner and problems in basic research. The realistic demand, policy and technology integration of urban growth boundary exists in our country certain applicability, and based on the analysis of our country set UGB driver, find the UGB of our country the necessity of the existence reason, and set with China’s characteristics the urban growth boundary lay the research foundation. Hezheng ecological on the weak foundation, from an ecological point of departure, on the basis of ecological substrate is not damaged, and guide the development of urban space. Urban Growth Boundary as a quantitative tool to determine the planning area, combined with the county’s own characteristic, build the ecological sensitivity of land evaluation system, the various indicators in the Arcgis9.0overlay analysis, and get county land ecological sensitive assessment map to determine the rigid boundary of the city, determine the rigid boundary. On the other hand, County future development needs of the city construction land scale is predicted from the county’s economic development level and population two aspects to determine the boundary of the city flexibility. The UGB delineated on the basis of combined analysis of the future direction of development of urban space, ultimately determine the scope of the urban planning area. Finally, the main conclusions and deficiencies are summarized. UGB is used to define the urban planning area boundary is the innovation of this paper.