地理学报 ›› 2012, Vol. 67 ›› Issue (7): 917-928.doi: 10.11821/xb201207005

• 环境变化 • 上一篇    下一篇

科尔沁沙地沙漠化时空演变及其景观格局——以内蒙古自治区奈曼旗为例

段翰晨1,2, 王涛1, 薛娴1, 郭坚1, 文星1,2   

  1. 1. 中国科学院寒区旱区环境与工程研究所, 兰州730000;
    2. 中国科学院研究生院, 北京100049
  • 收稿日期:2012-03-07 修回日期:2012-03-31 出版日期:2012-07-20 发布日期:2012-10-11
  • 通讯作者: 王涛(1959-), 男, 上海市人, 博士生导师, 研究员, 中国地理学会会员(S110000503M), 主要从事沙漠环境与沙漠化研究。E-mail: wangtao@lzb.ac.cn E-mail:wangtao@lzb.ac.cn
  • 作者简介:段翰晨(1984-), 男, 陕西西安人, 博士研究生, 主要从事沙漠化遥感监测与反演。E-mail: duanhanchen09@163.com
  • 基金资助:

    国家自然科学基金项目(40971162); 国家重点基础研究发展规划(973) 项目(2009CB421308)

Spatial-temporal Evolution of Aeolian Desertification and Landscape Pattern in Horqin Sandy Land: A Case Study of Naiman Banner in Inner Mongolia

DUAN Hanchen1,2, WANG Tao1, XUE Xian1, GUO Jian1, WEN Xing1,2   

  1. 1. Cold and Arid Regions Environmental and Engineering Research Institute, CAS, Lanzhou 730000, China;
    2. Graduate University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2012-03-07 Revised:2012-03-31 Online:2012-07-20 Published:2012-10-11
  • Supported by:

    National Natural Science Foundation of China, No.40971162; The National Basic Research Program of China, No.2009CB421308

摘要: 利用1975 年MSS影像, 1992 年、2006 年、2010 年TM影像和1999 年ETM +影像等5 个时期遥感影像为数据源, 提取奈曼旗35 年来沙漠化土地动态变化信息, 并在此基础上, 探讨了区域沙漠化土地景观格局时空演变特征, 旨在为科尔沁地区沙漠化治理和区域生态环境恢复与重建提供参考。结果表明:(1) 35 年来, 奈曼旗沙漠化土地面积总体呈逆转的趋势, 沙漠化总面积减少了123.43 km2, 沙漠化土地主要经历了先增加后减少的过程;(2) 景观格局呈波动性变化, 1999 年以前, 景观形状指数和多样性指数增加, 蔓延度和聚集度减小, 破碎化程度加强, 沙漠化程度上升, 沙漠化主导类型为中度和重度沙漠化, 1999 年以后破碎化程度变弱, 沙漠化程度明显下降, 沙漠化主导类型转变为中度和轻度沙漠化;(3) 1975-2010 年间轻度和中度沙漠化土地重心迁移最为明显, 轻度沙漠化土地重心向东北方向偏移了6.35 km, 中度沙漠化土地重心向西南方向偏移了7.24 km。

关键词: 科尔沁沙地, 沙漠化, 景观格局, 奈曼旗

Abstract: Taking Naiman Banner as the typical region, based on remote sensing, geographic information system, landscape ecology and mathematical statistics and other methods, using MSS images in 1975, TM images in 1992, 2006, 2010 and ETM + images in 1999 as data source, we examined dynamic changes the land aeolian desertification of the study area in recent 35 years, and on this basis, we discussed spatial-temporal evolution of landscape pattern of regional land aeolian desertification so as to provide reference for desertification control and eco-environmental restoration in the Horqin Sandy Land. The results show that (1) in the past 35 years, the aeolian desertification area decreased by 123.43 km2 with a reversal trend. Aeolian desertified land mainly experienced a process of increase to decrease; (2) landscape pattern changes in volatility, before 1999, landscape shape index and Shannon's diversity index increased, contagion and aggregation index decreased, and the fragmentation and desertification were intensified, the dominant types were moderate and severe aeolian desertified land. After 1999, the degree of fragmentation abated, and the desertification degree decreased obviously, moderate and light aeolian desertified land took the leading position; (3) the centroids of light and moderate aeolian desertified land moved obviously from 1975 to 2010, that of light aeolian desertified land moved 6.35 km to the northeast, and that of moderate aeolian desertified land moved 7.24 km to the southwest.

Key words: Horqin Sandy Land, aeolian desertification, landscape pattern, Naiman Banner