| Desert and Desertification |
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| Analysis on Sandy Land Dynamics and Driving Forces in the Last 18 Years in Xinjiang Based on Land Use Change Data |
| ZHANG Liang-xia1,2, WU Shi-xin1, MU Gui-jin1, HUANG Feng1,2 |
1.Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China;
2.Graduate University of Chinese Academy of Sciences, Beijing 100049, China |
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Abstract Based on Xinjiang land use dynamic data from 1990 to 2008, sandy land dynamics was analyzed with land use transition matrix and index model of land use change status and trend; the driving forces of sandy land dynamics was explored according to sandy land transitional direction and transition source. During 1990—2000, the sandy land area increased with a rate of 84.40 km2·a-1, and grassland was the biggest contributor to sandy land increase. During 2000—2005 and 2005—2008, it decreased with rates of 86.98 km2·a-1 and 118.26 km2·a-1, respectively, and cultivated land was the biggest contributor to sandy land decrease. Desertification was affected by both climate change and human activities. The expanding rate of sandy land during 1990—2000 had decreased by nearly one half of that in 1950—1990, showing the eco-environment of some area improved. The sandy land area in Xinjiang decreased gradually from 2000 to 2008 due to land reclamation, ecological construction and warm and humid climate conditions. The eco-environmental nature being vulnerability and aridity has not yet changed in Xinjiang, so Xinjiang is still endangered by potential desertification crisis.
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Received: 24 March 2011
Published: 20 January 2012
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2012, Vol. 32 
