干旱区生态环境知识资源中心(Arid): Experimental and numerical studies of dynamic variation of liquid water and water vapor flow in the vadose zone

Arid

DOI	10.1016/j.jhydrol.2023.129775
	Experimental and numerical studies of dynamic variation of liquid water and water vapor flow in the vadose zone
	Li, Weijian; Wang, Jinguo; Illman, Walter A.; Zhuo, Yue
通讯作者	Wang, JG
来源期刊	JOURNAL OF HYDROLOGY
ISSN	0022-1694
EISSN	1879-2707
出版年	2023
卷号	623
英文摘要	In arid and semi-arid regions, the depth of water table has a significant effect on evaporation. The soil in these regions is unsaturated, and the transport of liquid water and water vapor is accompanied by variation of the water table depth. In this study, we designed a laboratory experimental apparatus to conduct evaporation ex-periments of soil under shallow and deep water table conditions through continuous monitoring of water content and temperature variation in the vadose zone. A numerical model was used to simulate the coupled transport of liquid water, water vapor and heat in the vadose zone under two different water table elevations. The experi-mental and numerical results were in good agreement. Liquid water and water vapor fluxes driven by pressure head and temperature gradient were calculated and analyzed to illustrate the distribution of the water content. Both isothermal liquid flux and thermal vapor flux dominates the variation of water content. By determining the location of the evaporation front and analyzing its dynamic variation, we found that the evaporation front ranged from the surface to a depth of 2.5 cm under a shallow water table. For a deep water table, the evaporation front was nearly at a constant depth of 15 cm.
英文关键词	Vadose zone Evaporation front Water table Liquid water and vapor flow
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001034090600001
WOS关键词	HYDRAULIC CONDUCTIVITY ; HEAT-TRANSPORT ; POROUS-MEDIA ; EVAPORATION ; SOIL ; MOISTURE ; TEMPERATURE ; SURFACE ; TABLE ; MODEL
WOS类目	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Engineering ; Geology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/397407
推荐引用方式 GB/T 7714	Li, Weijian,Wang, Jinguo,Illman, Walter A.,et al. Experimental and numerical studies of dynamic variation of liquid water and water vapor flow in the vadose zone[J],2023,623.
APA	Li, Weijian,Wang, Jinguo,Illman, Walter A.,&Zhuo, Yue.(2023).Experimental and numerical studies of dynamic variation of liquid water and water vapor flow in the vadose zone.JOURNAL OF HYDROLOGY,623.
MLA	Li, Weijian,et al."Experimental and numerical studies of dynamic variation of liquid water and water vapor flow in the vadose zone".JOURNAL OF HYDROLOGY 623(2023).