| 近50年来毛乌素沙地的沙漠化过程研究 |
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| 引用本文： | 吴薇.近50年来毛乌素沙地的沙漠化过程研究[J].中国沙漠,2001,21(2):164-169. |
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| 作者姓名： | 吴薇 |
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| 作者单位： | 兰州大学资源环境学院, 甘肃兰州 730000;中国科学院寒区旱区环境与工程研究所, 甘肃兰州 730000 |
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| 基金项目： | 中国科学院资源与环境研究重点项目(KZ952-210J1)资助 |
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| 摘 要： | 根据野外考察、应用遥感和地理信息系统技术对毛乌素沙地进行动态研究表明，50年代沙漠化土地面积约为12900km^2，到了70年代中期达41110km^2,80年代后期，减少为32590km^2，至1993年又下降到了30650km^2。50-70年代是沙漠化土地迅速发展的时期，而进入80年代以后，总体上是处于逆转过程中，已有近9460km^2的沙漠化土地得到了治理，这主要得益于“三北”防护林工程的实施和当地政府与干部群众积极开展沙漠化防治的努力，也进一步证明了：沙漠化主要是人类造成的，也只有人类能够控制它。
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| 关 键 词： | 毛乌素沙地 沙漠化过程 遥感 人类活动 地理信息系统 GIS |
| 文章编号： | 1000-694X(2001)02-0164-06 |
| 修稿时间： | 2000年9月25日 |
Study on Process of
Desertification in Mu Us Sandy Land for Last 50 Years, China |
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| WU Wei.Study on Process of
Desertification in Mu Us Sandy Land for Last 50 Years, China[J].Journal of Desert Research,2001,21(2):164-169. |
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| Authors: | WU Wei |
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| Abstract: | Mu Us Sandy Land is one major region of desertification development and reversion in Northern China. The natural factors for causing desertification had formed from the environmental variation during the Quaternary period. In the historical process, the desertification had been situated on the development or reversion in different period, resulted from change of land-use pattern (grassing or cropping) and human economic activities and natural conditions (rainfall). For last 50 years, the process of desertification had been much active due to the impact of natural factor and human economic activities. Based on the field in- vestigation and analysis of remote sensing data and GIS, we have monitored the desertified land in Mu Us Sandy Land. The results show that there were about 12 900 km2 desertified land in earlier 1950s, 41 110 km2 in middle of 1970s, 32 590 km2 in late 1980 s and 30 650 km2 in 1993. During 1950 to 1970, the desertified land had rapidly spread. Since late of 1980 the process of desertification has been in the reversion situation and there were about 9 460 km2 desertified land have been restored for rangeland and farmland. The National Three-North Shelter Forest Construction and many efforts from the local government and people have contributed enormously for combating desertification in the region. It proves that man made desertification and only man can control it. |
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| Keywords: | last 50 years Mu Us Sandy Land process of desertification China |
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