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| 近35 a内蒙古阿拉善盟绿洲化过程遥感分析 | |
| 引用本文： | 谢家丽,颜长珍,李森,李波.近35 a内蒙古阿拉善盟绿洲化过程遥感分析[J].中国沙漠,2012,32(4):1142-1147. |
| 作者姓名： | 谢家丽 颜长珍 李森 李波 |
| 作者单位： | 1. 中国科学院寒区旱区环境与工程研究所,甘肃兰州730000 中国科学院研究生院,北京100049 2. 中国科学院寒区旱区环境与工程研究所,甘肃兰州,730000 3. 兰州大学,甘肃兰州,730000 |
| 基金项目： | 国家重点基础研究发展规划“973”项目，国家自然科学基金项目 |
| 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 |
Remote Sensing Monitoring of Oasis Spatial-temporal Changes in Alxa during Recent 35 Years |
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| XIE Jia-li,YAN Chang-zhen,LI Sen,LI Bo.Remote Sensing Monitoring of Oasis Spatial-temporal Changes in Alxa during Recent 35 Years[J].Journal of Desert Research,2012,32(4):1142-1147. | |
| Authors: | XIE Jia-li YAN Chang-zhen LI Sen LI Bo |
| Institution: | 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) |
| 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. |
| Keywords: | Alxa oasis remote sensing dynamic variation |
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