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JOURNAL OF DESERT RESEARCH ›› 2018, Vol. 38 ›› Issue (2): 233-242.DOI: 10.7522/j.issn.1000-694X.2018.00002

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Spatial-temporal Evolution of Aeolian Desertification Process in Ordos City during 1975-2015

Feng Kun1,2, Yan Changzhen1, Xie Jiali1, Qian Dawen1,2   

  1. 1. Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China;
    2. University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2017-10-27 Revised:2018-01-30 Online:2018-03-20 Published:2018-03-20

Abstract: The Ordos City is located in the semi-arid region and also an ecotone from temperate steppe to desert steppe, and it suffers the serious aeolian desertification problems like the other parts of Northern China. Due to its representative and typical characteristics of the development and reversal process of aeolian desertification and its driving factors, Ordos City has become one of the hot areas of desertification research. We derives the spatial and temporal patterns change information of aeolian desertification from 1975 to 2015 based on the Landsat images, and analyzed the driving factors with the principal component analysis (PCA) and meteorological and social-economic data. The results showed that in the context of the fragile ecological environment, the development of aeolian desertification in Ordos City in the forty years was mainly influenced by human factors, such as population increase, reclamation and overgrazing. The trend of land desertification and the dominant driving factors are different at different periods:The land desertification tended to deteriorate from 1975 to 2000, and the main driving factors were human activities, followed by natural factors; The land desertification was reversed in 2000-2015, and the natural factors played more important role than human activity in this period.

Key words: aeolian desertification, driving factor, principal component analysis, Ordos

CLC Number: