Abstract
The dynamics of desertification in the Horqin Sandy Land between 2000 and 2005 were analyzed using Landsat TM/ETM images and the data-processing function of geographical information software. The results showed that the extent of desertified land decreased at a rate of slightly more than 0.1 km2 year−1, from 22,423.1 km2 in 2000 to 22,422.4 km2 in 2005, indicating that desertification has been controlled in this area and that desert areas may be approaching a steady state. The dynamics of desertification differed among land types. Desertification decreased most obviously in areas of previous desert land. The area in which desertification was ameliorated was higher than the area that underwent further degradation, but non-desertified land (113.3 km2) deteriorated at a rate of 22.7 km2 year−1 during this period. This significant change requires careful attention by managers in the study area.
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Acknowledgments
This work was supported by the Knowledge Innovation Program of the Chinese Academy of Sciences (No. KZCX1-YW-08-02) the National Natural Science Foundation of China (No. 40571015) and The Processes of Oasification-Desertification and their Responding to Human Activities and Climatic Change and their Regulation in the Arid Region of China (No. 2009CB421308).
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Han, Z., Wang, T., Yan, C. et al. Change trends for desertified lands in the Horqin Sandy Land at the beginning of the twenty-first century. Environ Earth Sci 59, 1749–1757 (2010). https://doi.org/10.1007/s12665-009-0157-7
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DOI: https://doi.org/10.1007/s12665-009-0157-7