Research On Regional Environmental Carrying Capacity Based On GIS

Environmental Carrying Capacity determines the speed and scale of regional economic and social development. Guiding the healthy development of society and economy with ECC is the only way to achieve the coordinated development between environmental protection and social and economic development. ECC studies the structure system of regional social and economic-regional environmental. It includes two aspects: One is the microscopic structure, features and functions of regional environmental systems; the other is the direction and magnitude of regional social and economic activities. At present, the evaluation index system on ECC was too simple, and the specific screening basis and index system were seldom proposed by scholars. Meanwhile, about the studies of capacity, many of that were confined to some one environmental resource element. Currently, it is urgently to discuss regional environmental Capacity on a broader level of "social-economic-environment" for realizing the coordinated growth of "Man and Nature". Therefore, this paper proposed a quantitative method of calculating regional ECC based on the realization of sustainable development as the main objectives.In this paper, taking Linqing county as a case, the method of the combination of GIS and ECC was used. First, the research significance, progress and problems of the regional environmental capacity were introduced; combined with the research questions, the evaluation index system based on ECC relative surplus was established. Second, using the GIS spatial analysis module analyzed the single factor indicators. Finally, the degree of coordination was used to describe the coordination level of natural environment, society and economy of Linqing county; and using the method of cluster analysis, the 16 townships were classified, and proposed some guidance on sustainable development.The results of this study included the following four points:(1) Combined with the current problems and the principle of indicators selection of regional ECC,11 indicators were selected from the natural environment and socio-economic aspects to establish evaluation index system of regional ECC.(2) GIS spatial analysis was used to analyze spatial data and attribute data of the indicators, and obtained evaluation map and classification map of each index, and got area, distribution and reasons of each class via further statistics. (3) The classification map and the original township map were overlaid to obtain ECC classification map of the towns. The degree of coordination was used to describe the coordination level of natural environment,society and economy of Linqing county. The results showed that Wei Wan and Pioneer streets were well coordinated, Zhao and Pan Town Town barely coordinated and other towns were between the two;16 towns were divided into three categories by cluster analysis and combined with the actual, measures of coordination development between the town's economic and the environment protection were proposed.(4) The research result was consistent with conditions of socio-economy and environment of Linqing's towns which illustrated the index system based on ECC relative surplus was scientific and reasonable; the combination method of ECC and GIS was feasible, which not only deepened the theory of ECC for environmental assessment, but also enriched the application of GIS and laid the foundation for the future analysis adding more scientific and accurate evaluation index; but the study found that the accuracy quantitative method of single factor evaluation index should be strengthened, and the comprehensive study of the combination of 3S technology and ECC should be deepened, and ultimately achieved a scientific methods of ECC based on GIS.