FIELD SURVEY AND NUMERICAL SIMULATION OF FLUVIAL INUNDATION AND SEDIMENT DEPOSITION DUE TO DYKE BREACH OF CHIKUMA RIVER
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- KAWAIKE Kenji
- 京都大学 防災研究所
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- TAKEDA Makoto
- 中部大学 工学部都市建設工学科
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- TOYOTA Masashi
- 信州大学 工学部水環境・土木工学科
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- YOKAWA Hiroshi
- 中部大学 工学部都市建設工学科
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- YAMANOI Kazuki
- 京都大学 防災研究所
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- NAKAGAWA Hajime
- 京都大学 防災研究所
Bibliographic Information
- Other Title
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- 氾濫流による土砂堆積に着目した千曲川決壊氾濫の現地調査と数値解析
Abstract
<p> Severe damage was found in the Hoyasu area, Nagano City, due to the dyke breach of the Chikuma River and its fluvial inundation and sedimentation, which deteriorated agricultural crops and the cultivated lands. Through a field survey, it is found that the deposited sediment consisted of silt and clay with fine particles, and the thickness of deposition was 20 cm or more around the breach point. Next, through numerical simulations of bed load and suspended load, the maximum flow depth and overall sediment deposition could be reproduced. However, the accuracy of the model should be more improved to predict the sediment deposition more precisely at each point. Furthermore, an assumed area map of sediment deposition was suggested by overlapping the maximum thickness of deposition calculated from several breach points.</p>
Journal
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- Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)
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Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering) 76 (2), I_883-I_888, 2020
Japan Society of Civil Engineers
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Details 詳細情報について
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- CRID
- 1390008754689795072
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- NII Article ID
- 130008122694
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- ISSN
- 2185467X
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- Text Lang
- ja
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- Data Source
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- JaLC
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed