Study On Temporal-Spatial Differeces Of Urban Land Intensive Use In Chongqing Main Districts And Regional Centre

The main district of Chongqing is the most developed areas in policy, economy, culture and society, which is the "growth pole" in Chongqing, and plays a lead role in other counties'society and economy; while regional centers represent highest level in economic and social development in their own region, Which also affect the other counties'socio-economic development.This counties'land-use conditions is good, have great potential, but the contradictions are very significant in these areas, so the level of urban land intensive use in main districts and regional center is directly related to the long-term development strategy of Chongqing. As the national comprehensive reform pilot area, Chongqing's main districts and regional take a considerable task, with economy and population aggregation, development opportunities and contradictions in the supply of urban land resources is very prominent, therefore, how to coordinate the development and utilization of land resources sustainable, the answer is land use intensity, which is the only way to solve the problem.The paper summarizes recent studies in theory and research methods, models, based on the collective materials of the study area, with the DPSIR model to establish the assessment index system, then uses principal component analysis to evaluate temporal and spatial differences of urban land intensive use of main districts and regional centre in Chongqing, figures the degree of urban land use by mathematics method, meanwhile, analyzes the temporal and spatial changes of urban land intensive use in study area, finds its causes, and makes relevant policy recommendations.The paper outlines the natural conditions, socio-economic conditions of land use in 12 sample districts of Chongqing main districts and regional centre firstly, then analyzes the expansive type of urban land of each sample, the results show the expansion of urban land trends fatly in many districts of Chongqing at present, the urbanization of land is much faster than the population urbanization. On the basis, the use of Chongqing Statistical Yearbook 2001-2009 and the land change data 2000-2008 to study the temporal-spatial differences as well as influencing factors of urban land intensive use of main districts and regional centre in Chongqing.The results shows:(1) in 2000,the comprehensive average score of Urban land intensive use degree is 71.84,score of one hour social district except main district is 58.13,the northeast center Wanzhou's score is 52.54,the southeast center Qiangjiang's score is 49.21;in 2008, the score of those cities is respectively 81.71,67.53,64.23,62.12. spatially, the differences of urban land intensive use are significant in Chongqing, the main city is highest degree of urban land intensive use," one-hour economic circle " except main city is still high degree, but away from the main city, the Southeast an Northeast is low degree of urban land intensive use; temporally, The land use intensities in each central districts had been improving from 2000-2008, however, the intensity levels varied a lot.(2)the degree of coordination of DPSIR system with the urban land use intensity of central districts in Chongqing is positive correlation significantly, which indicate the coordination of DPSIR subsystems and their internal indicators can reflect the balance degree of urban land intensive use.(3) The evaluation method for urban intensive land use based on DPSIR model can reduce the impact of subjectivity of Delphi and AHP, explain the relationship between the indicators and the level of urban land use intensity, and reveal the spatial-temporal differences of urban land use intensity of each central district.At last, give some suggestions based on the results of paper:(1)according to the nature of each area to decorate industry types, exert comparative advantage play prominent feature, in order to achieve the goal of urban land intensive use, while the study area city should strengthen the development of the third industry, execute "half astern into three" industrial structure adjustment, make energy-intensive, polluting enterprise outsourcing or over to realize urban land intensive use towards ecological type; (2) from two levels of capital and labor to increase urban land investment, absorbing the social idle funds, combining the advantage of rich labor resources, through investment in the land to achieve urban land use intensive; (3) to formulate rational urban planning, strictly use control, strengthening the administration of land, control urban land excessive extension expansion, through the "internal tapping" to mining urban land intensive use potential of high intensive land use area, to realize three-dimensional land use. While, in the southeast and northeast of Chongqing, low levels of urban land intensive use area should be revitalize the stock land, to avoid extensive extension expansion on city roads, improve urban land use efficiency. According to the suggestions to designate the direction for digging the potential of urban land stock, provides some reference and basis for urban governors to plan the urban land use intensity, and promote the intensive use of urban land.