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  1. 防災科研関係論文

A multi-dimensional water transport model to reproduce preferential flow in the snowpack

https://nied-repo.bosai.go.jp/records/4248
https://nied-repo.bosai.go.jp/records/4248
5c6cb667-5329-457b-ad24-015d523451c6
Item type researchmap(1)
公開日 2023-03-30
タイトル
言語 en
タイトル A multi-dimensional water transport model to reproduce preferential flow in the snowpack
言語
言語 eng
著者 Hiroyuki Hirashima

× Hiroyuki Hirashima

en Hiroyuki Hirashima

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Satoru Yamaguchi

× Satoru Yamaguchi

en Satoru Yamaguchi

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Takafumi Katsushima

× Takafumi Katsushima

en Takafumi Katsushima

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抄録
内容記述タイプ Other
内容記述 A multi-dimensional water transport model for a snowpack was developed to reproduce preferential flow. Darcy-Buckingham's law and the van Genuchten model were used to simulate water movement. Parameters for the van Genuchten model were determined as functions of snow density and grain size, based on a previous gravity drainage column experiment. Water entry suction was newly incorporated to simulate liquid water infiltrating dry snow, based on the results of a previous capillary pressure experiment. Heterogeneity of grain size and snow density were also implemented. Heterogeneity alone was not sufficient for the development of preferential flow paths. When both water entry suction and heterogeneity were implemented, the model could simulate the formation of a preferential flow path. Validation of the simulation results by comparison with the results of a previous laboratory experiment showed that the simulated preferential flow path reproduced the experimental result fairly well. The size of the preferential flow path was negatively correlated with grain size and positively correlated with the water supply rate in both the simulation and the experiment. Comparison of the time series of suction between the simulation and the experimental result suggested that some additional measurements need to be obtained experimentally to improve the accuracy of the model. Sensitivity experiments showed that grain size and snow density heterogeneity affected both the size of the preferential flow path and the arrival time of liquid water at the snow base. These results suggest that more measurements of small-scale spatial variability in natural snow are needed to improve the model. (C) 2014 Elsevier B.V. All rights reserved.
言語 en
書誌情報 en : COLD REGIONS SCIENCE AND TECHNOLOGY

巻 108, p. 80-90
出版者
言語 en
出版者 ELSEVIER SCIENCE BV
ISSN
収録物識別子タイプ EISSN
収録物識別子 1872-7441
DOI
関連識別子 10.1016/j.coldregions.2014.09.004
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