Study On The Spatial And Temporal Evolution Of Land Resources Carrying Capacity In Central Yunnan Urban Economic Circle

Since twenty-first Century,with the development and progress of society,human beings are facing the problems of population,economy,society,ecology and so on.As a key development area in Yunnan Province,Central Yunnan Urban Economic Circle has been a huge increase in the intensity of development,the contradiction between economic development and resources and environment protection have become increasingly prominent,the land resources are extremely important resources support of Central Yunnan Urban Economic Circle and the precondition to ensure the sustainable and stable development of social economy.The problems of population,economy,society,ecology and so on have brought great pressure to the l land resources in Central Yunnan Urban Economic Circle,land resources has become an important factor to limit sustainable development of the region.Therefore,it is necessary to study land resources carrying capacity in Central Yunnan Urban Economic Circle.The land resources poly-factor carrying capacity and comprehensive carrying capacity were calculated and analyzed in this paper,and spatial analysis in geographic information system(GIS)were employed to analyze the carrying capacity of land resources,so as to obtain the spatial and temporal evolution characteristics and potential bearing capacity of land resources poly-factor carrying capacity and comprehensive carrying capacity of the 42 district(county),and grasp the development trend of the carrying capacity of land resources in the Central Yunnan Urban Economic Circle,and propose some corresponding suggestions and measures according to the existing problems of land resources.The main content of this paper is divided into the following three parts: the first part describes the research progress of land resources carrying capacity at home and abroad and some related theoretical basis.The second part is to construct comprehensive evaluation model of land resources in Central Yunnan Urban Economic Circle,including the construction of comprehensive evaluation indexsystem,the calculation of weight,the determination of evaluation criteria and the establishment of evaluation model and so on,and next is the calculation of the land resources poly-factor carrying capacity and comprehensive carrying capacity,and study the temporal evolution and spatial distribution and potential bearing capacity of the land resources poly-factor carrying capacity and comprehensive carrying capacity of the 42 district(county),finally is the elaboration of the influence factors of land resources carrying capacity in the Central Yunnan Urban Economic Circle,including internal factors of the system and external factors.The third part mainly expounds the conclusions and shortcomings of this paper,through the research on the land resources carrying capacity in the Central Yunnan Urban Economic Circle,the paper draws four conclusion,and puts forward the inadequacies of this study.