中文摘要：

浑善达克沙地及其周边地区是我国北方沙尘暴多发区之一，该区的土地利用与覆被变化反映了一系列的环境与社会经济问题。基于卫星遥感信息和空间数据处理技术，并结合地面实地调查资料、气象观测和社会经挤数据，得出了20世纪80年代末至90年代末这一地区土地利用与覆被变化情况。结果表明：耕地、建设用地和未利用地明显增加，草地和水域减少，变化面积最大的是草地，有944．42km^2的草地转变为其他用地类型；从变化速率来看，最快的是建设用地。增加了19．8％，其次是耕地，增加10．2％。土地利用转变的主要类型是草地向耕地和未利用地的转变，及耕地向建设用地的转变；呈退化趋势的土地面积近3倍于恢复土地面积。就土地利用与覆被变化的社会经济背景进行了深入分析。

英文摘要：

The Ortindag Sandy Land and its surrounding area are located at one of the most active dust storm center in China. The land use/cover changes of this area indicated a series of environmental and socioeconomic problems. Satellite imagery was used to quantify rates of land use/cover changes between 1980s and 1990s in this area. Overall, the areas of farmland, built-up and unused land increased visibly, while the areas of grassland and water decreased. The changed area of grassland was largest and the conversion area was 944.42 km^2. But the change rate of built-up area was highest at a rate of 19.8%, and the second was farmland, at a rate of 10.2%. The main types of land use/cover conversion were conversion from grassland to farmland and unused land, and from farmland to built-up. The degraded land area was nearly three times of the restored land area. In addition, the socioeconomic background of land use/cover change was discussed.