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DOI	10.1007/s40333-021-0104-3
	Large scale sand saltation over hard surface: a controlled experiment in still air
	Liu, Benli; Wang, Zhaoyun; Niu, Baicheng; Qu, Jianjun
通讯作者	Liu, BL (通讯作者)，Chinese Acad Sci, Northwest Inst Eco Environm & Resources, Key Lab Desert & Desertificat, Lanzhou 730000, Peoples R China. ; Liu, BL (通讯作者)，Res Stn Gobi Desert Ecol & Environm Dunhuang Gans, Lanzhou 730000, Peoples R China.
发表日期	2021
ISSN	1674-6767
EISSN	2194-7783
起始页码	599
结束页码	611
卷号	13 期号:6
英文摘要	Saltation is the major particle movement type in wind erosion process. Saltating sand grains can rebound up to tens of times larger in length and height over hard surface (such as gravel surface) than over loose sand surface. Gravels usually have different faces, causing distinct response of the impacting grains, but the effects of the grain and gravel-surface contact angle on grain rebound are not yet well quantified. We performed full-range controlled experiments of grain saltation using different contact angles, grain sizes and impact speeds in still air, to show that contact angle increases the height of representative saltation path but decreases particle travel length. The results were compared with outputs from the COMprehensive numerical model of SALTation (COMSALT). Large saltation height of 4.8 m and length of 9.0 m were recorded. The maximum and representative saltation height over the gravel surface were found to be about 4.9 times and 12.8 times those over the loose sandy surface, respectively. The maximum saltation length may be reduced by 58% and the representative saltation height may be increased by 77% as contact angle increases from 20 degrees to 40 degrees. We further showed that the collision inertia contributes 60% of the saltation length, and wind contributes to the other 40%. These quantitative findings have important implications for modeling saltation trajectory over gravel surface.
关键词	TRANSPORT TRAJECTORIES PROFILE
英文关键词	sand saltation; trajectory; gravel surface; contact angle; full-scale experiment
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS记录号	WOS:000679790300004
来源期刊	JOURNAL OF ARID LAND
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/253895
作者单位	[Liu, Benli; Wang, Zhaoyun; Qu, Jianjun] Chinese Acad Sci, Northwest Inst Eco Environm & Resources, Key Lab Desert & Desertificat, Lanzhou 730000, Peoples R China; [Liu, Benli; Qu, Jianjun] Res Stn Gobi Desert Ecol & Environm Dunhuang Gans, Lanzhou 730000, Peoples R China; [Wang, Zhaoyun] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Niu, Baicheng] Qinghai Normal Univ, Xining 810004, Peoples R China
推荐引用方式 GB/T 7714	Liu, Benli,Wang, Zhaoyun,Niu, Baicheng,et al. Large scale sand saltation over hard surface: a controlled experiment in still air[J]. 中国科学院西北生态环境资源研究院,2021,13(6).
APA	Liu, Benli,Wang, Zhaoyun,Niu, Baicheng,&Qu, Jianjun.(2021).Large scale sand saltation over hard surface: a controlled experiment in still air.JOURNAL OF ARID LAND,13(6).
MLA	Liu, Benli,et al."Large scale sand saltation over hard surface: a controlled experiment in still air".JOURNAL OF ARID LAND 13.6(2021).