喀斯特山区典型县域土地利用变化研究

Research on Land Use Changes of Typical Counties in Karst Area

运用土地利用动态度、土地利用转移矩阵和土地利用程度等指标,基于县域尺度研究了喀斯特山区的土地利用变化情况,分析了贵阳市1990～2010年土地利用变化主要类型、变化剧烈程度及其空间分布特征。结果表明:①贵阳市主要土地利用类型为林地、草地和耕地,1990～2010年林地和建设用地面积迅速增加,耕地和草地面积明显减小;②1990～2010年贵阳市各县域的综合土地利用动态度呈增大趋势,土地利用程度综合水平上升;③贵阳市各县域土地利用的开发幅度由大到小依次为贵阳市市辖区、清镇市、息烽县、修文县和开阳县。

In this paper, based on county scale, we used the land use dynamic degree, the transfer matrix of land use and land use degree to study land use changes in Karst Area, and analyzed the land use change type, change intensity and its spatial distribution characteristics in Guiyang City from 1990 to 2010. The results show that ①the main land use styles of Guiyang City are woodland, grassland and farmland. The areas of woodland and construction land are increasing rapidly, and the areas of farmland and grassland are decreasing significantly from 1990 to 2010.②The comprehensive land use dynamic degrees of each county in Guiyang City show increasing trend from 1990 to 2010.③The development levels of land use of each county in Guiyang City from large to small is as follows, Guiyang City, Qingzhen County, Xifeng County, Xiuwen County, Kaiyang County.