干旱区生态环境知识资源中心(Arid): Modified sloped bed splash function in sand saltation

Arid

DOI	10.1016/j.geomorph.2020.107570
	Modified sloped bed splash function in sand saltation
	Wang, Zhengshi; Jia, Shuming; Li, Zhi
通讯作者	Jia, SM (corresponding author), Northwest A&F Univ, Coll Nat Resources & Environm, Yangling 712100, Shanxi, Peoples R China.
来源期刊	GEOMORPHOLOGY
ISSN	0169-555X
EISSN	1872-695X
出版年	2021
卷号	376
英文摘要	Wind-blown sand induces serious desertification and consequently results in financial loss. Grain-bed interaction processes are primary responsible for sand saltation, which are generally described using a splash function. However, current splash functions are designed for horizontal beds although almost all sand surfaces are sloped (e.g., sand ripples and dunes), leading to the possibility of the predicted sand flux over a slope being several times higher than the observed flux. Herein, a three-dimensional splash function for a sloped bed that reasonably describes grain-bed interactions is proposed. The modified sloped bed splash function is introduced into a fluid-solid-coupled large-eddy simulation model, with which the wind-blown sand moments over various slope beds could be exactly reproduced. Simulation results show that the sediment transport mass flux on the uphill exhibited a nearly cubic dependence with the friction velocity, while that on the downhill showed an intermediate relationship between quadraticand cubic-dependence. This research provides a useful approach for investigating natural aeolian sand movements. (C) 2020 Elsevier B.V. All rights reserved.
英文关键词	Sloped bed Modified splash function Large eddy simulation (LES) Wind-blown sand
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000612688200004
WOS关键词	MODEL ; COLLISIONS ; SIMULATION ; GRAINS ; SPEED ; DUNE ; SNOW ; FLUX
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
来源机构	西北农林科技大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/350409
作者单位	[Wang, Zhengshi; Jia, Shuming; Li, Zhi] Northwest A&F Univ, Coll Nat Resources & Environm, Yangling 712100, Shanxi, Peoples R China
推荐引用方式 GB/T 7714	Wang, Zhengshi,Jia, Shuming,Li, Zhi. Modified sloped bed splash function in sand saltation[J]. 西北农林科技大学,2021,376.
APA	Wang, Zhengshi,Jia, Shuming,&Li, Zhi.(2021).Modified sloped bed splash function in sand saltation.GEOMORPHOLOGY,376.
MLA	Wang, Zhengshi,et al."Modified sloped bed splash function in sand saltation".GEOMORPHOLOGY 376(2021).