干旱区生态环境知识资源中心(Arid): Liquid and Vapor Water in Vadose Zone Profiles Above Deep Aquifers in Hyper-Arid Environments

Arid

DOI	10.1029/2018WR024435
	Liquid and Vapor Water in Vadose Zone Profiles Above Deep Aquifers in Hyper-Arid Environments
	Assouline, Shmuel; Kamai, Tamir
通讯作者	Kamai, Tamir
来源期刊	WATER RESOURCES RESEARCH
ISSN	0043-1397
EISSN	1944-7973
出版年	2019
卷号	55 期号:5 页码:3619-3631
英文摘要	Water vapor is a key element of the water regime in unsaturated profiles above deep aquifers in hyper-arid regions. However, the interactions between water phases and the resulting evaporation and condensation are poorly understood under such conditions. The main driver for vapor condensation in deep vadose zone profiles is the geothermal gradient, displaying a decrease in temperatures toward the soil surface, thereby promoting condensation. We have analyzed the water regime in deep unsaturated profiles, with and without the geothermal gradient, and considered two types of hydrological scenarios: (1) assuming hydraulic continuity of liquid water over the entire profile and (2) assuming the presence of an evaporative front in the profile above which water flows to the surface in the vapor phase. We considered homogeneous profiles of two soil types, investigating the distribution with depth of the different state variables: temperature, relative humidity, water potential, and vapor pressure and concentration. We found that during evaporation, only extreme conditions of high relative humidity near the surface could lead to condensation. In addition, even when hydraulic continuity of liquid water is assumed over the entire soil profile, potential condensation amounts are very small, practically negligible. For the case of a water table at 200-m depth, condensation occurs only when the relative humidity at the surface is above 95% and is less than 1.5% of the amount of water in the vapor phase in the profile.
类型	Article
语种	英语
国家	Israel
收录类别	SCI-E
WOS记录号	WOS:000474848500002
WOS关键词	HYDRAULIC CONDUCTIVITY ; CONCEPTUAL-MODEL ; SURFACE ; EVAPORATION ; FLUX ; IMPACT ; HEAT
WOS类目	Environmental Sciences ; Limnology ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/219291
作者单位	Agr Res Org, Volcani Ctr, Inst Soil Water & Environm Sci, Rishon Leziyyon, Israel
推荐引用方式 GB/T 7714	Assouline, Shmuel,Kamai, Tamir. Liquid and Vapor Water in Vadose Zone Profiles Above Deep Aquifers in Hyper-Arid Environments[J],2019,55(5):3619-3631.
APA	Assouline, Shmuel,&Kamai, Tamir.(2019).Liquid and Vapor Water in Vadose Zone Profiles Above Deep Aquifers in Hyper-Arid Environments.WATER RESOURCES RESEARCH,55(5),3619-3631.
MLA	Assouline, Shmuel,et al."Liquid and Vapor Water in Vadose Zone Profiles Above Deep Aquifers in Hyper-Arid Environments".WATER RESOURCES RESEARCH 55.5(2019):3619-3631.