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JOURNAL OF DESERT RESEARCH  2013, Vol. 33 Issue (6): 1622-1628    DOI: 10.7522/j.issn.1000-694X.2013.00241
Desert and Desertification     
Fluctuating of Wind-blown Sand Flux in Field Wind Condition
WANG Ping, ZHENG Xiao-jing
Ministry of Education Key Laboratory of Mechanics on Disaster and Environment in Western China, Lanzhou University, Lanzhou 730000, China
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Abstract  

This paper analyzes the fluctuating characteristics of wind-blown sand flux on the basis of the data acquired from the real-time measurements of wind velocity and saltation intensity by the measurement system. The results show that sand saltation reduces the mean wind velocity, but it has little influence on higher order statistical moments and probability distribution of wind series. Wind velocity in drifting sand approximately accords with Gaussian distribution under different heights and different mean wind velocities. Instantaneous saltation intensity obeys exponent distribution and is roughly 1 s late to the wind speed, and the fluctuation is fierce. As the average wind velocity increase, the average saltation wind-blown sand flux in 30 min intervals and its fluctuation augment in the form of power function. But with the change of the wind fluctuation, the average saltation wind-blown sand flux augments at first, then minishes. It indicates that the fluctuation of wind velocity is essential to saltation wind-blown sand flux and should be taken into consideration in prediction formula of transport rate.

Key words:  saltation wind-blown sand flux      fluctuating      field measurement     
Received:  21 September 2012      Published:  22 October 2012
ZTFLH:  X169  
Articles by authors
WANG Ping
ZHENG Xiao-jing

Cite this article: 

WANG Ping, ZHENG Xiao-jing. Fluctuating of Wind-blown Sand Flux in Field Wind Condition. JOURNAL OF DESERT RESEARCH, 2013, 33(6): 1622-1628.

URL: 

http://www.desert.ac.cn/EN/10.7522/j.issn.1000-694X.2013.00241     OR     http://www.desert.ac.cn/EN/Y2013/V33/I6/1622

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