内蒙古自治区沙质荒漠化研究

内蒙古自治区已是全国沙质荒漠化最严重、面积最大的省区之一。笔者结合1975、2000、2007年3期遥感影像对内蒙古自治区沙质荒漠化进行遥感信息提取,进而分析近30年来横向空间上、纵向时间上沙质荒漠化从面积变化、空间位置变化、转移方向变化、重心变化出发的变化规律。研究结果表明,内蒙古自治区1975～2000年沙质荒漠化面积变化不大,但整体呈发展趋势,且速率极慢;而2000～2007年沙质荒漠化面积显著地减少,各级沙质荒漠化土地都有不同程度的逆转趋势,逆转速率是极其可观的。

Study on Sandiness Desertification of Inner Mongolia

Inner Mongolia has become one of the most serious and the largest area sandiness desertification provinces(prefectures) in China.According to the remote sensing image data in 1975,2000 and 2007,the author extracted the information of sandiness desertification of Inner Mongolia from the remote sensing image data,and deeply analyzed the dynamic change rules of area,spatial location,transfer direction and center of gravity of sandiness desertification in both time dimension and space dimension in recent 30 years.The results showed that: during 1975~2000,the desertification area seldom changed,but generally presented a developing trend with an extremely low speed.However,during 2000~2007,there was a significant reduction in sandiness desertification area,and all levels of desertification had different degrees of reversal trend with a considerable rate.