Threshold friction velocity of crusted windblown soils in the Columbia Plateau

2014 ◽  
Vol 15 ◽  
pp. 227-234 ◽  
Author(s):  
B.S. Sharratt ◽  
Venkata Vaddella
Keyword(s):  
Friction Velocity ◽  
Threshold Friction Velocity ◽  
Columbia Plateau

scholarly journals Modeling the effect of humidity on the threshold friction velocity of coal particles

2012 ◽  
Vol 56 ◽  
pp. 154-160 ◽  
Author(s):  
Xiaochun Zhang ◽  
Weiping Chen ◽  
Chun Ma ◽  
Shuifen Zhan
Keyword(s):  
Friction Velocity ◽  
Threshold Friction Velocity ◽  
Coal Particles

Threshold friction velocity and soil loss across different land uses in arid regions: Iran

2019 ◽  
Vol 12 (3) ◽  
Author(s):  
Marzieh Mirhasani ◽  
Noredin Rostami ◽  
Masoud Bazgir ◽  
Mohsen Tavakoli
Keyword(s):  
Soil Loss ◽  
Arid Regions ◽  
Friction Velocity ◽  
Land Uses ◽  
Threshold Friction Velocity

scholarly journals Turbulent Characteristics of Saltation and Uncertainty of Saltation Model Parameters

2017 ◽  
Author(s):  
Dongwei Liu ◽  
Masahide Ishizuka ◽  
Yaping Shao
Keyword(s):  
Boundary Layer ◽  
Particle Size ◽  
High Frequency ◽  
Friction Velocity ◽  
Probability Distributions ◽  
Transport Processes ◽  
Model Parameters ◽  
Threshold Friction Velocity ◽  
Turbulent Characteristics ◽  
Turbulent Process

Abstract. It is widely recognized that saltation is a turbulent process, similar to other transport processes in the atmospheric boundary layer. But due to the lack of high frequency observations, the statistic behavior of saltation is so far not well understood. In this study, we use the data from the Japan-Australian Dust Experiment (JADE) to investigate turbulent saltation by analyzing the probability density function, energy spectrum and intermittency of saltation fluxes. Threshold friction velocity, u*t, and saltation coefficient, c0, are two important parameters in saltation models, often assumed to be deterministic. But as saltation is turbulent, we argue that it is more reasonable to consider them as parameters obeying certain probability distributions. The JADE saltation fluxes are used to estimate the u*t and c0 probability distributions. The stochasticity of these parameters is attributed to the randomness in friction velocity and threshold friction velocity as well as soil particle size.

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