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35a内没有发生变化。
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 BannerEjin 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.
出处
《中国沙漠》
CSCD
北大核心
2012年第4期1142-1147,共6页
Journal of Desert Research
基金
国家重点基础研究发展规划"973"项目(2009CB421301)
国家自然科学基金项目(41171400)资助
关键词
阿拉善
绿洲
遥感
动态变化
Alxa
oasis
remote sensing
dynamic variation
