毛乌素沙地荒漠化现状及分布特征

The Status and Distribution of Desertification in Maowusu Sandy Land

在Arcview、Arc/info等GIS软件的支持下,我们利用2000年秋季的TM影像对毛乌素沙地的荒漠化情况进行遥感监测,监测面积为8.137×104km2。2000年毛乌素沙地的荒漠化类型包括沙漠化、水土流失和盐碱化,共有荒漠化土地6.311×104km2,占区域总面积的77.56%,其中沙漠化面积5.081×104km2,水土流失面积1.190×104km2,盐碱化0.404×104km2,分别占荒漠化土地总面积的80.51%,18.85%,0.64%和区域总面积的62.44%,14.62%和0.5%。

Supported by GIS softwares, such as Arcview, Arc/info etc., the status of desertification in Maowusu sandy land was monitored by use of TM images in 2000, and 8. 137 × 10^4 km^2 of land was covered. In 2000, desertification includes sandy desertification, water erosion and salinization in Maowusu sandy land and there is totally 6. 311 × 10^4 km^2 of desertified land, accounting for 77.56% of the total area. Area of sandy desertified land, water eroded land and salinized land is 5. 081 × 10^4 km^2 , 1. 190 × 10^4 km^2 and 0. 404× 10^4 km^ respectively, occupying 80.51%, 18.85 % and 0.64% of total desertified land and 62.44%, 14.62% and 0.5% of the total area separately.