Spatial Distribution of Aeolian Desertification on the Qinghai-Tibet Plateau

doi:10.7522/j.issn.1000-694X.2018.00026

Journal of Desert Research ›› 2018, Vol. 38 ›› Issue (4): 690-700.DOI: 10.7522/j.issn.1000-694X.2018.00026

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Spatial Distribution of Aeolian Desertification on the Qinghai-Tibet Plateau

Li Qing¹, Zhang Chunlai², Zhou Na³, Shen Yaping², Wu Yongqiu², Zou Xueyong², Li Jiao², Jia Wenru², Wang Xuesong²

1. Institute of Geographical Sciences/Engineering and Technology Research Center for Application and Development of Geographic Information of Hebei Province, Hebei Academy of Sciences, Shijiazhuang 050021, China;
2. State Key Laboratory of Earth Surface Processes and Resource Ecology/MOE Engineering Research Center of Desertification and Blown-sand Control, Beijing Normal University, Beijing 100875, China;
3. College of Management Science and Engineering, Hebei University of Economics and Business, Shijiazhuang 050021, China

Received:2018-02-10 Revised:2018-03-19 Online:2018-07-20 Published:2018-11-06

Abstract

Abstract: Using field investigations in the Qinghai-Tibet Plateau to develop a desertification attribute set, we established an interpretation index system for Landsat TM remote sensing images to identify the distribution and severity of aeolian desertified land (ADL). Using this system, we obtained current data on the area of ADL and its spatial distribution through visual interpretation of the Landsat data. We found that 15.1% of the plateau (392 913 km²) suffered from aeolian desertification; this was mostly sandy ADL, gravel ADL, and aeolian yardangs. Most ADL was slight to moderate, but severe and extremely severe desertification occupied 12.2% of the plateau (47 946 km²). ADL was scattered throughout the plateau, but concentrated mostly in the western and northern parts. From the southeast to the northwest, the distribution of ADL changed gradually from a sporadic distribution with small areas to a continuous distribution over large areas, and the severity of desertification tended to increase. Regional differences in climate, landforms, Quaternary deposit type, and human activities accounted for the spatial distribution. We divided the plateau into five sub-regions based on the ADL characteristics (area, type, severity, spatial distribution, and cause):the Qaidam Basin arid desertification sub-region, high and cold northern Tibet and southern Qinghai desertification sub-region, semi-arid mountainous desertification sub-region of the Yarlung Zangbo River watershed, the semi-arid desertification sub-region of the upper reaches of the Huanghe River watershed, and the humid mountainous desertification sub-region of the Nujiang River, Lancang River, and Yangtze River watersheds.

Key words: aeolian desertified land, spatial distribution, control factors, zoning, Qinghai-Tibet Plateau

CLC Number:

P931.3

Li Qing, Zhang Chunlai, Zhou Na, Shen Yaping, Wu Yongqiu, Zou Xueyong, Li Jiao, Jia Wenru, Wang Xuesong. Spatial Distribution of Aeolian Desertification on the Qinghai-Tibet Plateau[J]. Journal of Desert Research, 2018, 38(4): 690-700.

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Spatial Distribution of Aeolian Desertification on the Qinghai-Tibet Plateau

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