摘要
利用1975年MSS、1990年TM和2000年ETM＊3期遥感数据提取黄河流域土地荒漠化动态变化信息。调查结果表明，黄河流域土地荒漠化具有明显的地域性，主要分布在流域西北部。荒漠化土地面积变化总体呈增加趋势，从1975年-2000年增加了10653．22km2，平均每年增加426．12km2。黄河流域地质背景和气候条件决定了荒漠化的总体分布和变化趋势，不合理的人类活动加速了荒漠化进程。
Dynamic change information of land desertification in the Yellow River Drainage Area was extracted from remote sensing images of three different periods, which include MSS （1975）, TM （1990） and ETM （2000）. Investigation shows that land desertification mainly occurred in the northwestern part and the area of land desertification increased 10 653.22 km2 from 1975 to 2000 ,i. e. , about 426.12 km2 per year. It was the geological and climate conditions that controlled the distribution and dynamic change trend of land desertification. In addition, improper human activity accelerated the desertification trend.
出处
《国土资源遥感》
CSCD
2008年第2期74-78,I0009,共6页
Remote Sensing for Land & Resources
基金
中国地质调查局“黄河流域基础地质环境遥感调查与监测(1212010510512)”
关键词
荒漠化
黄河流域
遥感
动态变化
Desertification
Yellow river drainage area
Remote sensing
Dynamic change
