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JOURNAL OF DESERT RESEARCH  2013, Vol. 33 Issue (5): 1293-1298    DOI: 10.7522/j.issn.1000-694X.2013.00191
Desert and Desertification     
Wind Regime of Yardang Landform Regions in the Qarhan Salt Lake
LI Ji-yan1, DONG Zhi-bao1,2, LI En-ju3, YANG Ning-ning2
1.Key Laboratory of Desert and Desertification, Cold and Arid Regions Environmental and Engineering Research Institute, China Academy of Sciences, Lanzhou 730000, China;
2.College of Tourism and Environment, Shaanxi Normal University, Xian 710062, China;
3.Shaanxi Radio & TV University, Xian 710119, China
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Abstract  

Sand drift potential (DP) is an important parameter in the dune geomorphology research, but in the study of wind erosion landforms, such as yardang landforms, there is few use. Based on the wind data collected from the automatic meteorological station installed at yardang landforms regions of the Qarhan Salt Lake, this paper analyzed the variation characteristics of wind speed, wind direction and sand drift potential. The results indicated that the monthly mean speed of sand driving wind ranges in 6.2-7.4 m·s-1, and the monthly maximum wind speed varies in 9.9-15.0 m·s-1. The sand driving wind mainly occurs in the spring and summer, the frequencies are 39.63% and 31.45%, respectively. The direction of sand driving wind is mainly WNW and W, accounting for 41.05% and 20.02%, respectively. The annual DP and RDP is 326 VU and 235 VU, respectively, hence the studied area belongs to intermediate wind energy environment. The annual net sand transport direction is ESE. The wind direction variability (RDP/DP) is 0.72, belongs to intermediate ratio and obtuse bimodal wind regimes. The directions of yardang bodies are basically in accordance with prevailing wind direction, so formation of yardang landform was affected mainly by wind power.

Key words:  yardang      sand drift potential      Qarhan Salt Lake     
Received:  15 June 2012      Published:  13 August 2012
ZTFLH:  P931.1  

Cite this article: 

LI Ji-yan1, DONG Zhi-bao1,2, LI En-ju3, YANG Ning-ning2. Wind Regime of Yardang Landform Regions in the Qarhan Salt Lake. JOURNAL OF DESERT RESEARCH, 2013, 33(5): 1293-1298.

URL: 

http://www.desert.ac.cn/EN/10.7522/j.issn.1000-694X.2013.00191     OR     http://www.desert.ac.cn/EN/Y2013/V33/I5/1293

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