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EVALUATION OF POTENTIAL LAND USE IN THE REGION OF LONGNAN BASED ON GIS

In the thesis,the region of Longnan in Gansu province has been taken as a case for the regionalization of potential land use to provide reference for the improvement of regional sustainable development competence.With the methods of AHP and GIS spatial analysis,the influence factors of terrain,distributing of population,condition of location,base of economy and frequency of earthquake were taken into account,and the natural conditions as well as the social-economic structure were rescanned to come to the conclusion that there are large regional differences in potential land use in the region of Longnan.The feasible development area,moderate development area and limitary development area distribute respectively in the northeast,the northwest,and the south as well as the northwest part of the region,accounting for 17.27%,44.41%,38.31%,respectively,and the regionalization of potential land use is a useful path to provide the scientific groundwork and guide of land exploitation and protection,i e.,some areas shine in exploitation of development while others may need ecological conservation and industry.