The Research Of Urban Land Comprehensive Carrying Capacity

With the positive progress of urbanization and the increasing urban population,the shortage of water and land resources, the pollution of ecological environment andurban traffic problems have become the short boards and bottlenecks of influencingand restricting urban economic and social development, which are importantchallenges to build a―people-oriented, resource-saving and environment-friendly‖harmonious society. At the same time, inefficient use, non-intensive and economicaluse, excessive use intensity and prominent supply and demand contradiction of urbanland resources seriously restrict urban low-carbon development, cycle developmentand green development, and impact urban ecological civilization construction in ourcountry. Therefore, this paper is necessary for the sustainable use and the sustainablecarrying of urban land to carry out more in-depth research. The main contents andconclusions are as follows:1. This paper describes the connotations of representative carrying capacity,combs the relevant research literatures of land carrying capacity, urban carryingcapacity and urban land carrying capacity at home and abroad, and reviews theseresearch literatures. Then, this paper introduces the relevant theories and methods ofurban land comprehensive carrying capacity, elaborates the development course ofPSR, DSR and DPSIR model, summarizes the indexes of reflecting the sustainablecarrying and the sustainable use of urban land, and gives the conceptual models ofsystem coordinated development degree, comprehensive evaluation and influencingfactors of urban land comprehensive carrying capacity under the DPSIR framework,which provide the theoretical groundwork and the technical support for the empiricalresearch of urban land comprehensive carrying capacity.2. The research on the coordinated development degree of urban landcomprehensive carrying capacity system. This paper builds an evaluation indexsystem on the coordinated development degree of urban land comprehensive carryingcapacity from the perspective of the supporting force and pressure intensity of urbanland, uses the gray relation entropy method to determine the weights of evaluationindexes, combining with the comprehensive index evaluation model, and gives theevaluation model of the coordinated development degree. And then this paper carries out the empirical research for the coordinated development degree of urban landcomprehensive carrying capacity system in the Bohai Rim urban agglomeration in2009, and analyzes the spatial distribution characteristics and the spatialautocorrelation for the coordinated development degree using the ArcGIS and GeoDasoftwares. The results show that it is more significant for the spatial distributionpattern on the coordinated development degree of urban land comprehensive carryingcapacity in Beijing-Tianjin-Hebei urban agglomeration, Shandong peninsula urbanagglomeration and Liaodong peninsula urban agglomeration, and it does not distributerandomly in space, but takes on spatial dispersion pattern of high and low differencesfor the coordinated development degree of urban land comprehensive carryingcapacity system in the Bohai Rim urban agglomeration in2009.3. The evaluation research of urban land comprehensive carrying capacity. Thispaper builds an evaluation index system of urban land comprehensive carryingcapacity more reasonably, which focuses on including the technological and culturalcarrying capacity as a single dimension and fuses the supporting force and pressureintensity of urban land. And this paper uses the method of local variable weight tocalculate the weights of secondary carrying capacity of each city, combining with theTOPSIS method, and gives the calculation steps of the TOPSIS model of localvariable weight. Then this paper carries out the comprehensive evaluation for the landcomprehensive carrying capacity of the Bohai Rim urban agglomeration in2009, andgives the type partitions and spatial carrying characteristics of the land comprehensivecarrying capacity. The results show this paper gets the short boards of secondarycarrying capacity and partition types of urban land, and it is relatively more obviousfor the differences of spatial carrying characteristics of the land comprehensivecarrying capacity in Beijing-Tianjin-Hebei urban agglomeration, Shandong peninsulaurban agglomeration and Liaodong peninsula urban agglomeration. In addition, thispaper analyzes the spatial autocorrelation of urban land comprehensive carryingcapacity in the Bohai Rim urban agglomeration in2009, and explores the relationshipbetween the carrying state and the system coordinated development degree.4. The spatial regression analysis of urban land comprehensive carrying capacity.Because there are some spatial differences of the land comprehensive carryingcapacity and the spatial carrying states in some cities of spatial agglomeration orspatial dispersion regions yet, so this paper selects15basic indexes which are moreclosely with the urban land comprehensive carrying capacity, and summarizes3main factors of influencing the urban land comprehensive carrying capacity which aredemographic factors, resource and environment factors and economic and socialfactors of urban land. And this paper uses the comprehensive index evaluation modelto calculate―evaluation variables data‖of urban land comprehensive carryingcapacity and its3influencing factors, analyzes ordinary least squares (OLS) modeland geographically weighted regression (GWR) model, and then carries out theempirical research for urban land comprehensive carrying capacity of the Bohai Rimurban agglomeration in2009. The results show that the enhancement of landpopulation carrying capacity, the optimization of land resource and environmentcarrying capacity and the boost of land economic and social carrying capacity in theBohai Rim urban agglomeration are able to enhance the sustainable carrying level ofurban land and mine the potential comprehensive carrying capacity level of urbanland at a considerable degree.