大余县土地利用空间格局变化分析

利用遥感技术与G IS技术,对遥感解译得到的大余县1990、2000年2期土地利用数据,在空间图形库系统支持下,从数量及空间变化两个方面对其进行分析,以及通过景观空间格局特征指标、空间转化类型及强度等,分析该区土地利用空间格局变化。结果表明：研究时段内,耕地、林地和水域面积减少,草地和城乡建设用地面积增加;景观多样性指数、破碎度指数和斑块伸长指数上升,同期景观优势度指数和均匀度指数下降;土地利用空间变化内在过程基本以耕地、林地、草地、水域、建设用地间相互转化为主导。

Analysis on Spatial Pattern Change of Land Use in Dayu County

The data of spatial pattern change of land use in 1990 and 2000 were obtained through translating TM images with the technologies of RS and GIS.And with the help of spatial cartographic data base system,the land use change in quantity and space was analyzed.Then the spatial pattern change of land use was analyzed according to the index of the spatial pattern of landscape,the spatial transformation type,and the intensity.The results showed that: the area of cultivated land,forestland and water land decreased,while the area of grassland and construction ground increased during the period of study.The degree of landscape diversity,landscape fragmentation,and patch extension index went up,and the degree of landscape dominance and landscape homogeneity went down.The inner change process of land use was dominant by the mutual transformation of cultivated land,forestland,grassland,water land and construction ground.