Threshold Friction Velocities of Saltation Sand Particles for Different Soil Moisture Conditions in the Taklimakan Desert
Threshold Friction Velocities of Saltation Sand Particles for Different Soil Moisture Conditions in the Taklimakan Desert
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DOI：
10.2151/sola.2009-047
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发表时间：
2009
期刊：
影响因子：
1.9
通讯作者：
M. Ishizuka;M. Mikami;Yutaka Yamada;F. Zeng
中科院分区：
文献类型：
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作者：
M. Ishizuka;M. Mikami;Yutaka Yamada;F. Zeng
根据沙粒计数器的测量结果，采用客观方法计算了塔克拉玛干沙漠戈壁区干（θv = 0.002 m3 m-3）和湿（θ v = 0.009 m3 m-3）条件下的跃移临界摩擦速度u*t，其值分别为0.48和0.56 m s-1。这一结果表明，当2003年3月降雪导致土壤湿度增加时，u*t增加。在参考高度z处的跃移通量q（z）与摩擦速度u* 和u*t之间发现了简单的关系。
Using an objective method to calculate the saltation threshold friction velocity u*t based on measurements using a sand particle counter, the values of u*t were determined to be 0.48 and 0.56 m s-1 under dry (θv = 0.002 m3 m-3) and wet (θv = 0.009 m3 m-3) conditions, respectively, at a gobi site in the Taklimakan Desert. This result shows that u*t increased when soil moisture increased resulting from snowfall in March 2003. A simple relationship was found between the saltation flux q(z) at a reference height z and friction velocity u* and u*t.