摘要
以内蒙古多伦县为研究对象 ,作时隔 5a的两次遥感调查 ,对内蒙古东南部农牧业交错带的土地沙化进行监测。建立了土地沙化分类体系 ,把土地沙化与土地利用紧密联系 ,依据植被指数概念 ,采用了一组比值组合 ,有效地将土地沙化类别分层分离。通过第一次遥感调查 ,了解到多伦县由于过度耕种和过度放牧 ,致使土地沙化十分严重。经第二次调查对比分析 ,退耕还林、退牧还草的治沙效果显著 ,土地沙化发展趋势得到遏制 ,遥感监测为地方政府的防沙治沙起了重要作用。
Land desertification investigation of the agriculture and graziery mixed area in Duolun region of Inner Mongolia was carried out twice within five years by means of TM image monitoring. The classification system of land desertification combining land desertification with land use can effectively delaminate and separate various sorts of land desertification by adopting a set of ratio combinations according to the vegetation indices. The first survey revealed that land desertification became increasingly serious due to excessive cultivation and grazing in Duolun County, and the second survey shows that the land desertification management has been effective and the trend of deterioration has been restrained. Remote sensing monitoring has been playing an active part in preventing and controlling desertification of that area.
出处
《国土资源遥感》
CSCD
2002年第2期10-14,共5页
Remote Sensing for Land & Resources
关键词
农牧交错带
土地沙化
遥感监测
土地利用
植被指数
Agriculture and graziery mixed area
Land desertification
Remote sensing monitoring
