Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2020WR027466 |
Simulation of Preferential Flow in Snow with a 2D Non‐Equilibrium Richards Model and Evaluation against Laboratory Data | |
Nicolas R. Leroux; Christopher B. Marsh; John W. Pomeroy | |
2020-08-10 | |
发表期刊 | Water Resources Research |
出版年 | 2020 |
英文摘要 | Recent studies of water flow through dry porous media have shown progress in simulating preferential flow propagation. However, current methods applied to snowpacks have neglected the dynamic nature of the capillary pressure, such as conditions for capillary pressure overshoot, resulting in a rather limited representation of the water flow patterns through snowpacks observed in laboratory and field experiments. Indeed, previous snowmelt models using a water entry pressure to simulate preferential flow paths do not work for natural snowpack conditions where snow densities are less than 380 kg m‐3. Because preferential flow in snowpacks greatly alters the flow velocity and the timing of delivery of meltwater to the base of a snowpack early in the melt season, a better understanding of this process would aid hydrological predictions. This study presents a 2D water flow through snow model that solves the non‐equilibrium Richards equation. This model, coupled with random perturbations of snow properties, can represent realistic preferential flow patterns. Using 1D laboratory data, two model parameters were linked to snow properties and model boundary conditions. Parameterizations of these model parameters were evaluated against 2D snowpack observations from a laboratory experiment and the resulting model sensitivity to varying inputs and boundary conditions was calculated. The model advances both the physical understanding of and ability to simulate water flow through snowpacks and can be used in the future to parameterize 1D snowmelt models to incorporate flow variations due to preferential flowpath formation. |
领域 | 资源环境 |
URL | 查看原文 |
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/287835 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | Nicolas R. Leroux,Christopher B. Marsh,John W. Pomeroy. Simulation of Preferential Flow in Snow with a 2D Non‐Equilibrium Richards Model and Evaluation against Laboratory Data[J]. Water Resources Research,2020. |
APA | Nicolas R. Leroux,Christopher B. Marsh,&John W. Pomeroy.(2020).Simulation of Preferential Flow in Snow with a 2D Non‐Equilibrium Richards Model and Evaluation against Laboratory Data.Water Resources Research. |
MLA | Nicolas R. Leroux,et al."Simulation of Preferential Flow in Snow with a 2D Non‐Equilibrium Richards Model and Evaluation against Laboratory Data".Water Resources Research (2020). |
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