GEOGRAPHICAL RESEARCH ›› 2011, Vol. 30 ›› Issue (9): 1669-1682.doi: 10.11821/yj2011090011

• Earth Surface Processes • Previous Articles     Next Articles

Dynamic changes and driving force of grassland sandy desertification in Xilin Gol: A case study of Zhenglan Banner

LI Jin-ya1, XU Bin1, YANG Xiu-chun1, JIN Yun-xiang1, LI Ya-yun2, ZHANG Ji2, ZHAO Li-na3, LI Run-lin1   

  1. 1. Institute of Agricultural Resources and Regional Planning, CAAS, Beijing 100081, China;
    2. Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China;
    3. Institute of Botany, CAS, Beijing 100093, China
  • Received:2010-08-19 Revised:2010-11-29 Online:2011-09-20 Published:2011-09-20

Abstract: Based on the dynamic degree analysis and grid calculation analysis of the TM/ETM data in four periods, the status and spatial dynamic variation of grassland sandy desertification in Zhenglan Banner were monitored and studied. The relationships between grassland sandy desertification and relevant factors, i.e. climate, population, and livestock, were discussed. The results show that: 1) The change direction of grassland desertification was due to the interconversion of non-sandy and three-level desertification grassland. 2) The change of medium grassland desertification affects the structure and change direction of the grassland desertification prominently. 3) The developing-sandy grassland area is mainly distributed in the southeast of Sain Hudag and the eastern part of Sanggin Dalai. 4) Human factors, such as animal husbandry and desertification control policies were the dominant factors during the reversion and deterioration process of grassland desertification, while natural factors had no significant change as the environmental background.

Key words: grassland sandy desertification, space-time dynamic change, remote sensing, driving force analysis