Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018WR023030 |
Evaporation From Deep Aquifers in Arid Regions: Analytical Model for Combined Liquid and Vapor Water Fluxes | |
Kamai, Tamir; Assouline, Shmuel | |
2018-07-01 | |
发表期刊 | WATER RESOURCES RESEARCH
![]() |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2018 |
卷号 | 54期号:7页码:4805-4822 |
文章类型 | Article |
语种 | 英语 |
国家 | Israel |
英文摘要 | Evaporation is a significant part of the water cycle in hyper-arid environments. The subsurface of these deserts is characterized by deep groundwater with negligible recharge, whereby water flows from the water table to the surface and evaporates. We propose an analytical model to predict the evaporation rate and the position of the evaporative front. The model accounts for water table depth, atmospheric conditions, and soil hydraulic properties. We consider steady state flow, with two distinct regions separated by an evaporative front, liquid-phase flow from the water table to the front and vapor-phase flow from the front toward the surface. The driving forces are pressure head gradients for Darcian liquid flow, and thermal and relative humidity gradients for Fickian diffusive vapor flow. Evaporation rates are predicted for different soil types. The impact of constitutive models applied for characterizing these soils, groundwater depth, and atmospheric conditions are evaluated. Evaporation increases as groundwater levels are shallower, and as atmospheric temperatures increase and/or relative humidity values decrease. Evaporation decreases exponentially with groundwater depth, approaching a constant value of about 0.02 mm per year under typical atmospheric conditions and water table depths below 500 m. The impact of soil type and other related uncertainties are important when groundwater is shallower than 300 m. The relative portion of the liquid phase region increases compared to that of the vapor one as evaporation rates increase. The actual size of the liquid phase flow region, however, reaches its maximum when the water flux approaches zero at hydrostatic conditions. |
英文关键词 | evaporation hydrology soil deep groundwater |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000442502100035 |
WOS关键词 | DESERT VADOSE ZONES ; HYDRAULIC CONDUCTIVITY ; CONCEPTUAL-MODEL ; GAS-DIFFUSION ; SOIL ; SURFACE ; DYNAMICS ; IMPACT ; LAYER ; HEAT |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/21519 |
专题 | 资源环境科学 |
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 | Kamai, Tamir,Assouline, Shmuel. Evaporation From Deep Aquifers in Arid Regions: Analytical Model for Combined Liquid and Vapor Water Fluxes[J]. WATER RESOURCES RESEARCH,2018,54(7):4805-4822. |
APA | Kamai, Tamir,&Assouline, Shmuel.(2018).Evaporation From Deep Aquifers in Arid Regions: Analytical Model for Combined Liquid and Vapor Water Fluxes.WATER RESOURCES RESEARCH,54(7),4805-4822. |
MLA | Kamai, Tamir,et al."Evaporation From Deep Aquifers in Arid Regions: Analytical Model for Combined Liquid and Vapor Water Fluxes".WATER RESOURCES RESEARCH 54.7(2018):4805-4822. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论