DOI: 10.1002/2014GL059827
论文题名: Effects of the water retention curve on evaporation from arid soils
作者: Ciocca F. ; Lunati I. ; Parlange M.B.
刊名: Geophysical Research Letters
ISSN: 0094-10085
EISSN: 1944-9816
出版年: 2014
卷: 41, 期: 9 起始页码: 3110
结束页码: 3116
语种: 英语
英文关键词: arid soil
; evaporation
; residual saturation
; water-retention curve
Scopus关键词: Arid regions
; Dynamics
; Forecasting
; Soil moisture
; Vapors
; Water content
; Arid soils
; Enhancement factor
; Residual saturation
; Residual water content
; Simple modifications
; Soil moisture dynamics
; Water retention
; Water retention curve
; Evaporation
; arid region
; Aridosol
; evaporation
; residual soil
; runoff
; soil moisture
; vadose zone
; water retention
英文摘要: Water retention curves approaching infinitely negative matric potentials at residual water content are widely employed to model soil moisture dynamics. When used in numerical simulations, these retention curves fail to satisfactorily describe evaporation from arid soil (moisture-limited regime) because they do not allow the soil to dry below residual water content. We show that simple modifications can be introduced to prevent unrealistic water retention at residual water content and predict more physically sound moisture dynamics. Modified retention models that allow drying below residual predict a moisture-limited regime characterized by a thin subsurface evaporation zone and produce vapor fluxes up to 3 times larger than classical retention models. This might reduce the need to introduce empirical enhancement factors and improve the capability of modeling evaporation into the atmosphere and runoff in arid regions. Key Points Improve vapor transport description and evaporation predictions in arid soils Show the failure of standard models in describing vapor dynamics Discuss implications of better evaporation predictions out of the vadose zone © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84901942111&doi=10.1002%2f2014GL059827&partnerID=40&md5=b4996b5694e7cc6d3575678c94648ddb
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7349
Appears in Collections: 气候减缓与适应
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作者单位: School of Architecture, Civil and Environmental Engineering, EPF Lausanne, Lausanne, Switzerland
Recommended Citation:
Ciocca F.,Lunati I.,Parlange M.B.. Effects of the water retention curve on evaporation from arid soils[J]. Geophysical Research Letters,2014-01-01,41(9).