干旱区生态环境知识资源中心(Arid): Vertical Profiles of Wind-Blown Sand Flux over Fine Gravel Surfaces and Their Implications for Field Observation in Arid Regions

Arid

DOI	10.3390/atmos11101029
	Vertical Profiles of Wind-Blown Sand Flux over Fine Gravel Surfaces and Their Implications for Field Observation in Arid Regions
	Liu, Jiaqi; Kimura, Reiji; Wu, Jing
通讯作者	Liu, JQ
来源期刊	ATMOSPHERE
EISSN	2073-4433
出版年	2020
卷号	11 期号:10
英文摘要	We used a compact boundary layer wind tunnel equipped with a turbulence generator and a piezoelectric blown-sand meter to investigate the effects of the surface coverage of fine gravel on wind-blown sand flux. The vertical profile of wind-blown sand over a flat sand surface showed an exponential distribution at all wind speeds, whereas the profile over gravel surfaces of 20% or greater coverage showed a non-monotonic vertical distribution. At 20% to 30% gravel coverages, a peak of wind-blown sand flux developed between 6 and 10 cm above the ground at all wind speeds because of less energy loss due to grain-bed collisions at that level. To analyze the erosional state of wind-blown sand, we used the Wu-Ling index (lambda) of the mass-flux density of sand-bearing wind. Values of lambda for all gravel coverages were greater than 1 at all wind speeds, indicating an unsaturated (erosional) state. Moreover, we found that the wind-blown sand flux at 4 cm height accounted for about 20% of the total flux regardless of wind speed and gravel coverage. This finding can simplify future estimations of total near-surface wind-blown sand flux based on field observations because such measurements can be taken at just one height.
英文关键词	arid regions boundary layer wind tunnel wind-blown sand flux vertical profiles fine gravel
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000584188800001
WOS关键词	MOGAO GROTTOES ; GOBI ; SALTATION ; TRANSPORT ; DESERT ; ATOP ; ASIA
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/327214
作者单位	[Liu, Jiaqi; Kimura, Reiji; Wu, Jing] Tottori Univ, Arid Land Res Ctr, Hamasaka 1390, Tottori 6800001, Japan
推荐引用方式 GB/T 7714	Liu, Jiaqi,Kimura, Reiji,Wu, Jing. Vertical Profiles of Wind-Blown Sand Flux over Fine Gravel Surfaces and Their Implications for Field Observation in Arid Regions[J],2020,11(10).
APA	Liu, Jiaqi,Kimura, Reiji,&Wu, Jing.(2020).Vertical Profiles of Wind-Blown Sand Flux over Fine Gravel Surfaces and Their Implications for Field Observation in Arid Regions.ATMOSPHERE,11(10).
MLA	Liu, Jiaqi,et al."Vertical Profiles of Wind-Blown Sand Flux over Fine Gravel Surfaces and Their Implications for Field Observation in Arid Regions".ATMOSPHERE 11.10(2020).