沙漠化遥感动态监测的方法与实践

Method and Practice of Remote Sensing Monitoring on Desertification Development

土地沙漠化是我国北方地区一个严重的环境经济问题，进行遥感动态监测是了解其发展过程、状态和趋势的有效方法。本项研究在确定了沙漠化土地遥感判别指征体系和监测技术路线的基础上，提出遥感动态监测的方法，并以毛乌素沙地为例，利用不同时期的ＴＭ遥感资料对土地沙漠化进行了动态监测。结果表明，该方法能够揭示出研究区内沙漠化土地时空分布及其变化规律。

Land desertification is a very serious environmentaleconomic problem in the North China.To carry out remote sensing monitoring is an effective measure for understanding the expanded processes,status and trends of desertification.Based on the formation of the interpretation indicator system and technological process,we advanced a method of remote sensing monitoring on desertification development and practised it in the Mu Us sandy Land.The results indicate that to depend on this method we can bring to light the distribution of desertified land in time and space and their patterns of evaluation,which will provide scientific basis for successfully combating desertification.