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

	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
来源期刊	Journal of Arid Land
ISSN	1674-6767
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 mum 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
收录类别	CSCD
WOS研究方向	Geology
CSCD记录号	CSCD:6595732
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/336192
作者单位	Li Chao, College of Geography and Tourism, Shaanxi Normal University, Xi'an, Shaanxi 710119, China.; Dong Zhibao, College of Geography and Tourism, Shaanxi Normal University, Xi'an, Shaanxi 710119, China.; Yin Shuyan, College of Geography and Tourism, Shaanxi Normal University, Xi'an, Shaanxi 710119, China.; Chen Guoxiang, College of Geography and Tourism, Shaanxi Normal University, Xi'an, Shaanxi 710119, China.; Yang Junhuai, College of Geography and Tourism, Shaanxi Normal University, Xi'an, Shaanxi 710119, 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.