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  1. 防災科研関係論文

Dependence of the water retention curve of snow on snow characteristics

https://nied-repo.bosai.go.jp/records/5730
https://nied-repo.bosai.go.jp/records/5730
0ba4ce7a-29ae-4c71-a1a4-6125c2da78d0
Item type researchmap(1)
公開日 2023-03-30
タイトル
言語 en
タイトル Dependence of the water retention curve of snow on snow characteristics
言語
言語 eng
著者 Satoru Yamaguchi

× Satoru Yamaguchi

en Satoru Yamaguchi

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Kunio Watanabe

× Kunio Watanabe

en Kunio Watanabe

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Takafumi Katsushima

× Takafumi Katsushima

en Takafumi Katsushima

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Atsushi Sato

× Atsushi Sato

en Atsushi Sato

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Toshiro Kumakura

× Toshiro Kumakura

en Toshiro Kumakura

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抄録
内容記述タイプ Other
内容記述 The water retention curve (WRC), which shows the relationship between the volumetric liquid water content, theta(v), and suction, h, is a fundamental part of the characterization of hydraulic properties. Therefore, the formulation of the WRC as a function of snow characteristics is essential for establishing a model of water movement through the snow cover. In this study, we measured the WRC of several snow samples, which had different characteristics (grain size, bulk dry density and grain type), using a gravity drainage column experiment and then analysed these data using the Van Genuchten soil physics model (VG model). The shape of the WRC depended strongly on both the sample grain size, d, and bulk dry density, rho. Therefore, we introduced the parameter rho/d to model the WRC of snow. The relationships between the parameters alpha and n of the VG model and rho/d change with grain type. For melt forms, alpha, which is related to the inverse value of the air-entry suction, increases quickly as rho/d decreases, whereas n, which is related to the gradient of theta(v) vs h, increases with rho/d. Conversely, neither of these parameters of the VG model for rounded grains showed obvious dependence on rho/d. These results suggest that water movement through snow cover can be modelled using grain size, bulk dry density and grain type based on the soil physics model.
言語 en
書誌情報 en : ANNALS OF GLACIOLOGY

巻 53, 号 61, p. 6-12, 発行日 2012
出版者
言語 en
出版者 INT GLACIOL SOC
ISSN
収録物識別子タイプ ISSN
収録物識別子 0260-3055
DOI
関連識別子 10.3189/2012AoG61A001
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