結氷河川における河道形状を考慮したアイスジャム発生条件に関する研究
書誌事項
- タイトル別名
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- THE RELATIONSHIP BETWEEN ICE JAM OCCURRENCE AND THE CROSS-SECTIONAL PROFILE OF ICE-COVERED RIVERS
- THE RELATIONSHIP BETWEEN ICE JAM OCCURRENCE AND THE CROSS-SECTIONAL PROFILE OF ICE-COVERED RIVERS
抄録
This study aims to clarify the relationship between ice jam occurrence and the cross-sectional profile of ice-covered rivers. We carried out hydraulic experiments in a test channel that reproduced an icecovered river. The test channel had four sections, each with a different river width and river bed slope. The hydraulic conditions that were varied were ice sheet area, ice sheet discharge and flow discharge. The research clarified the following. Ice sheets tend to deposit at places of great water depth and low flow velocity. Ice jams are generated under the following conditions: large ice sheet area, high ice sheet discharge and low flow discharge. Moreover, the relationship between ice sheet transportation and water slope was inferred. The probability of ice jam occurrence can be estimated from the ice sheet’s Froude number by using ice sheet thickness and ice sheet velocity. When the ice sheet’s Froude number is small, the ice sheet velocity is low.
収録刊行物
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- 河川技術論文集
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河川技術論文集 20 241-246, 2014-06
公益社団法人 土木学会
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詳細情報 詳細情報について
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- CRID
- 1050282813784852480
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- NII論文ID
- 120005620246
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- 本文言語コード
- ja
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- 資料種別
- journal article
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- データソース種別
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- IRDB
- CiNii Articles
- KAKEN