根据 1990,2001 年 2 期 TM 卫星影像资料，通过 3S 技术手段，获取了丹江流域 20 世纪 90 年代的土地利用变化时空数据。结果表明：丹江流域土地利用类型以林地、草灌和耕地为主，林地、草灌和耕地在 1990 年和2001年2个时期占研究区面积比例分别为 71.73%,14.12%,9.15% 和 76.29%,10.57%,7.49% 。 1990-2001 年间，丹江流域土地利用年变化率最大的是林地，达到 34.73 ％，其次是草灌地，为-27.01% ；未利用地和水域的年变化率较小，分别为 0.24% 和 -0.32% 。园地的空间动态度最大，其次是未利用地，说明这二者的空间转化相对比较频繁，尤其是近期园地的转化。这主要与土地利用程度下降，耕地减少，园地、林地、建设用地等的比重增加有关。

The spatial and temporal data of the land utilization changes in Danjiang basin in the 1990s were acquired by means of 3S-technology, according to the TM satellite image data of 1990 and 2001. The result shows that the land use types in Danjiang basin are mainly woodland, grassland and farmland, and the percentages in the study area of woodland, grassland and farmland in 1990 and 2001 were 71.73% , 14.12% , 9.15% and 76.29% , 10.57% , 7.49% , respectively. From 1990 to 2001, the biggest annual changing rate came from woodland, reaching 34.73% , followed by 27.01% of grassland. The annual changing rates of unutilized land and water areas were comparatively small, being 0.24% and 0.32% , respectively. The biggest space dynamic degree came from garden land, followed by unutilized land. It shows that the spatial transformation of both types of land use is relatively frequent, particularly for the recent garden land, which is related to the decrease of land use degree, farmland reduction and the proportion increases of garden land, woodland, construction land, etc.