基于RS与GIS的榆林地区土地利用变化分析

Analysis of Land-use Change in Yulin Prefecture Based on RS and GIS

根据1986年和2000年2期TM影像资料和其它辅助资料,运用人机交互目视解译方法以及地理信息系统的空间分析和数理统计功能,分析了榆林地区土地利用变化的数量变化、变化速度和区域差异等特征,以及各类型之间的转化情况。结果表明:14年间,榆林地区未利用地减少1305.56km2;耕地、林地、草地分别增加567.11,99.6,616.79km2;未利用地和建设用地的年变化率最大,分别为1.11%及0.91%;土地利用变化存在明显的区域差异;各类型间的转化突出表现为未利用地向草地转化,草地向林地和耕地转化。

The remote sensing and GIS has become one of the important tools to study landuse change. This paper takes Yulin prefecture as an example. Depending on 1986 and 2000 TM images and other data, we achieved the landuse change data after interpretation. This paper analyzed the situation of landuse change in temporal and spatial aspects with the GIS and statistic methods. The results show that: in recent 14 years the unused land decreased by 1 305.56 km2, cultivated land increased by 567.11 km2, forest land and grassland increased by 99.6 km2 and 616.79 km2 respectively. The change rate of unused and construction land is most high. There is obvious area differentiation in landuse change. In the direction of landuse change the conversion from unused land to grassland and from grassland to forest and cultivated land is prominent. 