遥感技术在高寒草甸及其退化草地上的应用研究

利用ＴＭ、ＳＰＯＴ卫片以及１９８５年、１９９７年２年地面观测资料．经遥感影像综合评判和ＱＩＳ表据处理．查明了达日县建设乡高寒草甸及其退化草地的面积。并得出以下结论：①卫片解译可以辩别退化草地和未退化草地；②沙丘和冲沟侵蚀一般无法与其它形式的退化草地相区别；③卫片可区分出草甸、灌丛和沼泽这３个草地类；④人沟管理的植被区只有在植被特征发生了显著的改观，才可以用遥感技术鉴别；⑤在草地规划和管理中，应用卫片具有很大的潜力。

Applied Research of Using Remote Sensing Technology to Investigate Alpine Meadow Grassland Resource and Degradation

Landsat TM image,Spot image and field investigation data of 1985 and 1997 were usedto study the grassland resource and degradation in Jianshe township of Dart County. image interpretation and data GIS processing show results as follow; 1). Image interpretation can distinguishbetween degraded and non - degraded land; 2). It can not distinguish between dune erosion andgullies erosion and other kind form of degradation; 3). It do distinguish the three basic naturalvegetation classes as Alpine Meadow, Alpine Shrub and Alpine Marsh; 4). The managed vegetation area can only be distinguished when it is large enough and major changes happened; 5).Satellite image and remote sensing show a great potential on grassland resource investigation,planning and management.