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DOI | 10.1029/2018WR022969 |
Simulation of Capillary Pressure Overshoot in Snow Combining Trapping of the Wetting Phase With a Nonequilibrium Richards Equation Model | |
Leroux, Nicolas R.; Pomeroy, John W. | |
2019 | |
发表期刊 | WATER RESOURCES RESEARCH |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2019 |
卷号 | 55期号:1页码:236-248 |
文章类型 | Article |
语种 | 英语 |
国家 | Canada |
英文摘要 | The timing and magnitude of snowmelt discharge and subsequent runoff are controlled by both matrix and preferential flows of water through snowpacks. Matrix flow can be estimated using the Richards equation, and recently, preferential flow in snowpacks has been represented in 2D and 3D models. A challenge for representing preferential flow through porous media in 2D or 3D is capillary pressure overshoot in 1D. Soil studies have developed sophisticated and largely realistic approaches to represent capillary pressure overshoot, but it has not been addressed in snowpack water flow models. Here a 1D nonequilibrium Richards equation model is implemented with dynamic capillary pressure and is combined with a new concept of entrapment of liquid water within the pore space. This new model well represented capillary pressure overshoot, as estimated by published capillary pressure measurements in snow samples of various grain sizes under different rates of liquid water infiltration. Three model parameters were calibrated, and their impacts on model outputs were evaluated. This improvement is a substantial step toward better understanding and simulating physical processes occurring while liquid water percolates an initially dry snowpack. |
英文关键词 | unsaturated flow snow capillary overshoot saturation overshoot Richards equation entrapment of wetting phase |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000459536500013 |
WOS关键词 | GRAVITY-DRIVEN FINGERS ; WATER TRANSPORT MODEL ; PREFERENTIAL FLOW ; POROUS-MEDIA ; 2-PHASE FLOW ; CONSTITUTIVE RELATIONS ; UNSATURATED MATERIALS ; SATURATION OVERSHOOT ; MULTIPHASE FLOW ; INFILTRATION |
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/22048 |
专题 | 资源环境科学 |
作者单位 | Univ Saskatchewan, Ctr Hydrol, Saskatoon, SK, Canada |
推荐引用方式 GB/T 7714 | Leroux, Nicolas R.,Pomeroy, John W.. Simulation of Capillary Pressure Overshoot in Snow Combining Trapping of the Wetting Phase With a Nonequilibrium Richards Equation Model[J]. WATER RESOURCES RESEARCH,2019,55(1):236-248. |
APA | Leroux, Nicolas R.,&Pomeroy, John W..(2019).Simulation of Capillary Pressure Overshoot in Snow Combining Trapping of the Wetting Phase With a Nonequilibrium Richards Equation Model.WATER RESOURCES RESEARCH,55(1),236-248. |
MLA | Leroux, Nicolas R.,et al."Simulation of Capillary Pressure Overshoot in Snow Combining Trapping of the Wetting Phase With a Nonequilibrium Richards Equation Model".WATER RESOURCES RESEARCH 55.1(2019):236-248. |
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