巴丹吉林沙漠拐子湖地区贴地层风速廓线和风沙流结构特征

Abstract

Abstract: A field monitoring test was carried out in Guaizi Lake region in the Badain Jaran Desert so as to study the wind profile and sand drift structure in the region. The Analyzed results reveal that both free wind and sand drift profile can be scattered by Z=A·exp(-X/T)+Z₁but the fitted coefficient of sand drift was higher. In the sand drift structure, the percentage of sand transport rate, sand concentration and energy of moving particles were all in an increase trend with the increase of height below 20 cm from the ground. The percentage of sand transport rate at all the heights was decreased with the increase of height above 20 cm, the proportion of sand transport rate was about 51% of the total, and sand drift occurred mainly in an air layer below 20 cm from the ground. Vertically, there was a negative correlation between average particle size and height, but a positive one between average particle size and wind velocity. These conclusions are of great guiding importance for constructing windbreak against sand drift in the Guaizi Lake region.

Key words: wind profile, sand drift structure, Guaizi Lake region, Badain Jaran Desert

HE Qing, HU Wen-Feng, YANG Xing-Hua, AI Li-·Mai-Mai-Ti-Ming, ZHAO Cong-Min. Research on Wind Profile and Sand Drift Structure in Guaizi Lake Region in the Badain Jaran Desert[J]., 2012, 29(3): 517-523.

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Research on Wind Profile and Sand Drift Structure in Guaizi Lake Region in the Badain Jaran Desert

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