地理学报 ›› 2011, Vol. 66 ›› Issue (5): 653-661.doi: 10.11821/xb201105008

• 生态评价 • 上一篇    下一篇

基于时间序列植被特征的内蒙古荒漠化评价

殷贺1, 李正国1,2, 王仰麟1, 蔡福3   

  1. 1. 北京大学城市与环境学院, 北京 100871;
    2. 中国农业科学院农业资源与农业区划研究所, 北京 100081;
    3. 中国气象局沈阳大气环境研究所, 沈阳 110016
  • 收稿日期:2010-10-19 修回日期:2011-02-26 出版日期:2011-05-20 发布日期:2011-05-20
  • 通讯作者: 李正国, E-mail: lzg.123@263.net
  • 作者简介:殷贺(1985-), 男, 山东微山人, 理学硕士, 主要从事土地利用及景观生态学方面的研究。E-mail: hyinhe@gmail.com
  • 基金资助:

    国家重点基础研究发展计划(973 计划) (2010CB951502); 国家自然科学基金重点项目(40930101); 国家科技支撑计划资助项目(2006BAD20B07)

Assessment of Desertification Using Time Series Analysis of Hyper-temporal Vegetation Indicator in Inner Mongolia

YIN He1, LI Zhengguo1,2, WANG Yanglin1, CAI Fu3   

  1. 1. College of Urban & Environmental Sciences, Peking University, Beijing 100871, China;
    2. Key Laboratory of Resources Remote Sensing & Digital Agriculture, Ministry of Agriculture, Beijing 100081, China;
    3. Institute of Atmospheric Environment, CMA, Shenyang 110016, China
  • Received:2010-10-19 Revised:2011-02-26 Online:2011-05-20 Published:2011-05-20
  • Supported by:

    National Basic Research Program of China (973 Program), No.2010CB951502; Key Program of National Natural Science Foundation of China, No.40930101; National Key Technologies R & D Program of China, No.2006BAD20B07

摘要: 荒漠化是中国北方干旱、半干旱地区面临的主要生态环境问题。从植被特征着手,关注其年际动态变化特征,已经成为国内外荒漠化评价的发展趋势。选取遥感反演的高时间分辨率的植被降水利用率作为评价指标,利用时间序列分析方法,评价了内蒙古自治区1999-2009 年的荒漠化发展态势,并对荒漠化逆转问题进行了初步讨论。结果表明:内蒙古自治区11 年来生态环境总体趋于改善,荒漠化发展态势并不明显。其中,鄂尔多斯高原的东部至大青山南麓、大兴安岭及燕山北部余脉是内蒙古自治区生态环境改善最为明显的地区,反映出该区的植被保护政策发挥了积极的作用;荒漠化土地空间分异特征表明,降水因子和植被恢复有着密切的联系,300mm以上降水量的地区,其植被恢复能力要明显大于降水稀少的地区;干旱、极干旱地区的荒漠界限极不稳定,对荒漠化是否逆转的判断必须在特定的时间尺度,结合当年的气候条件进行综合分析。

关键词: 荒漠化评价, 植被动态, 植被降水利用率, 荒漠化逆转, 内蒙古

Abstract: Desertification is one of the serious threats to the environment in arid and semi-arid northern China. In order to understand inter-annual vegetation dynamics, vegetation indicators have been widely used in desertification assessment. In this study, rain use efficiency (RUE) derived from hyper-temporal remote sensing images has been used for desertification assessment. Based on time-series analysis, this study focused on how the desertification developed in Inner Mongolia and how the desertification reversed in the extremely arid environment. Results showed that during the past 11 years, there was no significant desertification development in Inner Mongolia. Parts of area showed a significant increase trend of RUE, especially in the eastern part of Ordos Plateau and southern Daqing Mountain, as well as the region from the Greater Hinggan Mountains to northern Yanshan Mountains. It is indicated that the ecological conditions in these areas have tended to be much better than before. The reason may be that the vegetation protection policies adopted in northern China have exerted a positive effect on the local environment. The results also showed that there was a significant relationship between rainfall and vegetation restoration, areas with more precipitation tend to be more easily restored, especially in the areas with more 300 mm precipitation. In addition, the research on desertification reversion showed that the desert edge region in western Inner Mongolia have changed intensively, and desertification reverse assessment needs to be further examined.

Key words: desertification assessment, vegetation dynamics, rain use efficiency, desertification reversion, Inner Mongolia