关键词: 岩溶山区, 地貌形态, 土地利用变化, 麻江县

Abstract: [Objective] This article aimed to promote the optimal allocation and sustainable utilization of land resources in karst mountainous areas with complex topography. [Method] Based on the database of land use in Majiang county in 1992 and 2012, the characteristics of land use changes of three kinds of landform types(low-mountain and hilly, mid-mountain gorge, karst ridgetrough) were analyzed and compared by the by using of ArcGIS software. [Results] ① The cultivated land, forest land, grassland and construction land in different landform types changed greatly, while the changes of water area and unused land changed slightly; the quantitative changes of the forest land, grassland and construction land in low-mountain and hilly and cultivated land in mid-mountain gorge were the most remarkable. ② The reciprocal transformations of the forestland and grassland, and the transformation from cultivated land to construction land in low-mountain and hilly were dominant; the reciprocal transformations of the cultivated land, forestland and grassland in mid-mountain gorge were dominative; The reciprocal transformations of the cultivated land and forestland in karst ridge-trough were dominant. ③ The reciprocal transformations of the cultivated land, forestland and grassland were distributed most in a great slope terrain; the transformation from cultivated land to construction land was distributed most in the relatively small slope areas. [Conclusion] Complex morphology characteristics of karst mountain areas plays an prominent influence on land use change. The policy of replacing agriculture with forestation and the urbanization development are important drivers.

Key words: karst mountainous area, topography, land use change, Majiang county