Research on Land Use Change and sustainable use in Karst areas——with special reference to Guiyang city in Guizhou province

Using Guiyang city as research area,the index system was constructed from some aspects of the resources protection of sustainable use,the ecological rationality of sustainable use,the economical feasibility of sustainable use,the social acceptability of sustainable use on the basis of analysing land use change.The level of sustainable land use was assessed by the overal evaluation model of sustainable land use and the impedient factors of sustainable land use was analyzed by the diagnostic model of the impedient factors of sustainable land use.The countermeasures for sustainable land use in Guiyang city are proposed in the paper.