RIPARIAN VEGETATION SEED DISPERSAL AND SETTLEMENT ON BARE SANDBARS IN ALTERNATE AND BRAIDED CHANNELS.
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- KYUKA Tomoko
- 富山県立大学工学部環境社会基盤工学科
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- YAMAGUCHI Satomi
- 国立開発研究法人寒地土木研究所
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- WATANABE Kento
- 前 北海道大学大学院工学研究院(現所属:日本工営株式会社)
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- SHIMIZU Yasuyuki
- 北海道大学大学院工学研究院
Bibliographic Information
- Other Title
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- 交互砂州と網状河川の裸地砂州における河道内樹木の種子分散と定着特性
Abstract
<p> To know the dispersal and recruitment characteristics of pioneer riparian vegetation that first invade bare sandbars after floods, seeds (particles) transported by the flow were investigated using laboratory flume experiments and numerical analysis. Seed dispersal was observed throughout the entire channel during the flood in both alternate sandbars and braided channels. In the case of alternate sandbars, seed settlement occurred locally at the edge of sandbars, during the period of discharge recession. On the other hand, in the case of the braided channel, even under high flow conditions, the main channel shifts and diverges on a small scale, resulting in advance and retreat at the sandbar edge. Therefore, unlike alternate sandbars, particles were widely settled on the braided bars. The dispersal and settlement of buoyancy seeds are strongly controlled by hydrograph shape, channel morphodynamics during floods, and seed dispersal timing rather than seeds characteristics itself (size and specific gravity, etc.), under the conditions of this experiment and numerical analysis.</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) 78 (2), I_859-I_864, 2022
Japan Society of Civil Engineers
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Details 詳細情報について
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- CRID
- 1390013408148813312
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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
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- Abstract License Flag
- Disallowed