干旱区生态环境知识资源中心(Arid): Influence of salinity and moisture on the threshold shear velocity of saline sand in the Qarhan Desert, Qaidam Basin of China: A wind tunnel experiment

Arid

DOI	10.1007/s40333-019-0058-x
	Influence of salinity and moisture on the threshold shear velocity of saline sand in the Qarhan Desert, Qaidam Basin of China: A wind tunnel experiment
	Li Chao; Dong Zhibao; Yin Shuyan; Chen Guoxiang; Yang Junhuai
通讯作者	Yin Shuyan
来源期刊	JOURNAL OF ARID LAND
ISSN	1674-6767
EISSN	2194-7783
出版年	2019
卷号	11 期号:5 页码:674-684
英文摘要	Determination of the threshold shear velocity is essential for predicting sand transport, dust release and desertification. In this study, a wind tunnel experiment was conducted to evaluate the influence of salinity and moisture on the threshold shear velocity of saline sand. Saline sand samples (mean particle size of 164.50-186.08 mu m and the total silt, clay and salt content of 0.80%-8.25%) were collected from three saline sand dunes (one barchan dune and two linear dunes) in the Qarhan Desert, Qaidam Basin of China. Original saline sand samples were placed in two experimental trays for wet and dry processing to simulate deliquescence and desiccation, respectively. Surface moisture content ranging from 0.30% to 1.90% was generated by the steam method so that the saline sand can absorb water in a saturated water vapor environment. The motion of sand particles was determined by the observers with a solid laser. The laser sheet (0.80 cm thick), which was emitted by the solid laser, horizontally covered the sand surface and was bound to the sand. Results show that the cohesion of saline sand results from a combination of salt and water. The threshold shear velocity increases exponentially with the increase in crust thickness for the linear sand dunes. There is a positive linear correlation between the original moisture content and relative threshold shear velocity. The threshold shear velocity of dewatered sand is greater than that of wet sand with the same original moisture content. Our results will provide valuable information about the sand transport of highly saline soil in the desert.
英文关键词	threshold shear velocity saline sand barchan dune linear dune crust thickness moisture content Qaidam Basin
类型	Article
语种	英语
国家	Peoples R China
开放获取类型	Bronze
收录类别	SCI-E
WOS记录号	WOS:000507479000004
WOS关键词	STIMULATED LUMINESCENCE AGES ; FRICTION VELOCITY ; LINEAR DUNES ; INTERNAL STRUCTURES ; SEDIMENT TRANSPORT ; LATERAL MIGRATION ; CRUST DEVELOPMENT ; NORTHERN MARGIN ; TIBETAN PLATEAU ; DUST EMISSION
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
EI主题词	2019-10-01
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/310089
作者单位	Shaanxi Normal Univ, Coll Geog & Tourism, Xian 710119, Peoples R China
推荐引用方式 GB/T 7714	Li Chao,Dong Zhibao,Yin Shuyan,et al. Influence of salinity and moisture on the threshold shear velocity of saline sand in the Qarhan Desert, Qaidam Basin of China: A wind tunnel experiment[J],2019,11(5):674-684.
APA	Li Chao,Dong Zhibao,Yin Shuyan,Chen Guoxiang,&Yang Junhuai.(2019).Influence of salinity and moisture on the threshold shear velocity of saline sand in the Qarhan Desert, Qaidam Basin of China: A wind tunnel experiment.JOURNAL OF ARID LAND,11(5),674-684.
MLA	Li Chao,et al."Influence of salinity and moisture on the threshold shear velocity of saline sand in the Qarhan Desert, Qaidam Basin of China: A wind tunnel experiment".JOURNAL OF ARID LAND 11.5(2019):674-684.