Characteristics of wind-blown sand and dynamic environment in the section of Wudaoliang-Tuotuo River along the Qinghai-Tibet Railway |
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| Authors: | Ke-cun Zhang Jian-jun Qu Qing-he Niu Qing-jie Han |
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| Institution: | (1) Key Laboratory of Desert and Desertification and Dunhuang Gobi and Desert Ecology and Environment Research Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, 730000, China |
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| Abstract: | Based on the detailed wind data and in situ observation of wind-blown sand in the section of Wudaoliang-Tuotuo River along
the Qinghai-Tibet Railway, the dynamic environment of sand flow, involving sand-laden wind, drift potential, sand transport
and their time variation were investigated. The prevailing direction of sand-laden wind obviously varies seasonally. Sand-laden
wind presents unidirectional characteristics from winter to the next spring and its prevailing direction is westerly. In summer,
northeasterly wind begins to increase and lasts for a short period. The annual drift potential along the Qinghai-Tibet Railway
reaches 970.54 Vector Units (VU), which belongs to a high-energy wind environment. Directional variability of wind regime
(RDP/DP, RDP is the resultant drift potential (RDP) and DP is drift potential) is 0.88. The RDP is 854.31VU in the direction
of 89.7°, which indicates that westerly sand-laden wind prevails in this region. Sand transport is well correlated to the
frequency of sand-laden wind and increases with drift potential logarithmically. |
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