中文摘要：

为增进对土地利用空间行为变化的理解，以分形理论为指导，在RS和GIS技术支持下，建立了东江源流域土地利用空间数据库，运用分形模型和提取数据对江西东江源流域土地利用空间格局的变化进行了研究。获得了1985年和2000年两个时期各个土地利用类型的分形维数和不稳定性指数，并且参照了常用的景观指数，包括斑块密度指数、景观斑块形状破碎化指数和景观类型分离度指数，对土地利用空间行为变化进行了定量分析，研究结果显示。景观斑块破碎度指数由0．945变为0．936，呈下降趋势；其他林地和有林地等土地利用类型的稳定性呈上升趋势，而高覆盖度草地、水域、灌木林地、旱地、水田等土地利用类型的稳定性明显降低，说明近期应当对它们进行适当保护；对其他林地和有林地而言，分形维数降低的程度，一方面说明了土地斑块形态规整化改善的程度，另一方面也说明了人们改善土地形态的行为强度，如植树造林、退耕还林。

英文摘要：

Fractal theory is a new tool for the study of land use spatial behavior, and the techniques of remote sensing and GIS provide a technical platform. First, we extracted land use classification information from Landsat TM images of the source watershed of the East River from 1985 and 2000, and constructed a spatial database of land use. Second, in order to improve the understanding of land use change in the East River watershed, we used the fractal model to calculate fractal indices of different landscape patterns and some landscape indices including number of patches, fragmentation index of landscape shape, and landscape separation. Results showed that the fractal dimension of land patches increased from 1. 3066 to 1. 3095. The land types which contributed most to the change are water areas, high-coverage grass, and dry land. The land types which showed an increase in persistence index are open forest land and paddy field, and the other land types decreased. These changes are the integrated effects of industry structure modification, cultivated land protection policies and the subsidized conversion of cultivated sloping land to forest. The land use patch density was 0.0079 patches per hectare in 1985 and 0.0081 patches per hectare in 2000. Thus, the average acreage per patch increased during this period. The land types with relatively large changes in patch density are shrubs, water area and high-coverage grassland, of which shrubland increased while the other two decreased. For the fragmentation index of landscape shape, the average fragmentation of all landscape patches increased from 0.945 in 1985 to 0.986 in 2000. This change corresponds with the change in fractal dimension. In terms of landscape ecology, a lower fractal dimension means that there is less interface between a land patch and other land use types. So the lower opportunity for external interference contributes to stability of a land patch. From 1985 to 2000, no large natural disaster happened in the study area. The change of land morphology and la