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中国沙漠 ›› 2012, Vol. 32 ›› Issue (4): 1142-1147.

• 生态经济 • 上一篇    下一篇

近35 a内蒙古阿拉善盟绿洲化过程遥感分析

谢家丽1,2, 颜长珍1, 李 森1,2, 李 波3   

  1. 1.中国科学院寒区旱区环境与工程研究所, 甘肃 兰州 730000;
    2.中国科学院研究生院, 北京 100049; 3.兰州大学, 甘肃 兰州 730000
  • 收稿日期:2011-11-29 修回日期:2011-12-24 出版日期:2012-07-20 发布日期:2011-12-24

Remote Sensing Monitoring of Oasis Spatial-temporal Changes in Alxa during Recent 35 Years

XIE Jia-li1,2, YAN Chang-zhen1, LI Sen1,2, LI Bo3   

  1. 1.Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China;
    2.Graduate University of Chinese Academy of Sciences, Beijing 100049, China; 3.Lanzhou University, Lanzhou 730000, China
  • Received:2011-11-29 Revised:2011-12-24 Online:2012-07-20 Published:2011-12-24

摘要: 绿洲是干旱区人类活动的高度聚集区,它的时空格局变化对社会经济发展有着至关重要的影响。以1975年至2010年间5期Landsat系列数据为信息源,通过目视解译提取阿拉善盟绿洲信息,在GIS空间分析功能的支持下,对绿洲时空格局变化进行了分析。研究结果表明,阿拉善绿洲按面积大小分布依次为:阿拉善左旗、额济纳旗和阿拉善右旗;1975—2010年间,阿拉善绿洲面积变化总体上呈先缩小后增长的趋势;其中草地的变化量最大,占整个绿洲变化面积的64.92%;研究区绿洲主导景观类型为天然草地,并且35 a内没有发生变化。

关键词: 阿拉善, 绿洲, 遥感, 动态变化

Abstract: Oasis is an highly concentration area of human activities in arid region, its spatial-temporal changes have a vital impact on regionally social and economic development. Based on Landsat images of 5 periods from 1975 to 2010 in Alxa, Inner Mongolia, China, visual interpretation and GIS spatial analysis were used to extract oasis information and analyze its spatial-temporal pattern changes. Results show that the oasis area for different counties in Alxa ranks as: Alxa Left Banner>Ejin Banner > Alxa Right Banner. From 1975 to 2010, the oasis area in Alxa decreased before 2000 and increased since 2000, in which the change of meadow area was the largest, accounting for 64.92% of the total oasis area change. In the 35 years, natural meadow was always dominant oasis type in Alxa.

Key words: Alxa, oasis, remote sensing, dynamic variation

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