Liquid water movement in a snowpack under the heavy rainfall event
| Project/Area Number |
26350482
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Natural disaster / Disaster prevention science
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| Research Institution | Hokkaido University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
平島 寛行 国立研究開発法人防災科学技術研究所, 雪氷防災研究センター, 主任研究員 (00425513)
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2014: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Keywords | 春の大雨 / 融雪洪水 / 積雪内浸透水 / 積雪水分移動モデル / 積雪内浸透 |
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| Outline of Final Research Achievements |
To replicate rain-on-snow events, artificial rain sprinkling experiments were performed on natural snowpack in Moshiri, northern Hokkaido, Japan. The results showed that a remarkable outflow from the snowpack bottom was observed in some cases of the experiments, and that there were no outflow in other cases. These differences could be caused by the existence of snow layer boundary with large contrast in grain size. To make sure of this hypothesis, a multi-dimensional water transport model developed by Snow and Ice Research Center was used for the reproduction simulations of the experiment results. Simulation results showed that the existence of snow layer was important to delay the liquid water percolation at the boundary. However, it was more important that whether the outflow from the snowpack bottom occurred or not was strongly dependent on the development of preferential pathways in the deeper snow layers.
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Report
(4 results)
Research Products
(17 results)
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[Presentation] 災害としての雪，資源としての雪2016
Author(s)
石井吉之
Organizer
日本分析化学会北海道支部第51回氷雪セミナー
Place of Presentation
札幌北広島クラッセホテル（北海道北広島市）
Year and Date
2016-01-10
Related Report
Invited
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