| 研究課題/領域番号 |
23K04329
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| 研究種目 |
基盤研究(C)
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| 配分区分 | 基金 |
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| 応募区分 | 一般 |
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| 審査区分 |
小区分25030:防災工学関連
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| 研究機関 | 神戸大学 |
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研究代表者 |
ゴメス クリストファー 神戸大学, 海事科学研究科, 教授 (20800577)
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| 研究分担者 |
堀田 紀文 東京大学, 大学院農学生命科学研究科(農学部), 准教授 (00323478)
宮田 秀介 京都大学, 防災研究所, 准教授 (80573378)
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| 研究期間 (年度) |
2023-04-01 – 2026-03-31
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| 研究課題ステータス |
交付 (2023年度)
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| 配分額 *注記 |
4,550千円 (直接経費: 3,500千円、間接経費: 1,050千円)
2025年度: 520千円 (直接経費: 400千円、間接経費: 120千円)
2024年度: 1,170千円 (直接経費: 900千円、間接経費: 270千円)
2023年度: 2,860千円 (直接経費: 2,200千円、間接経費: 660千円)
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| キーワード | driftwood detection / radar application / watershed hazards / SABO / 流木 / 土石流 / 自然災害 / 電波 / 砂防 |
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| 研究開始時の研究の概要 |
To date, there is no detection system of wood traveling in rivers that works in all weather and in poor visibility conditions. Therefore, the present research tests electromagnetic systems to detect and measure the velocity and size of the wood debris, in order to develop new warning systems.
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| 研究実績の概要 |
During the first year of the project, a set of (a) Laboratory experiments (Kobe University) were performed in a flume, in order to measure the velocity and the size of driftwood using electromagnetic methods. The radar-based calculations were compared to the velocimetry, and one Msc student has been working on the topic for her research project.
The laboratory experiments have been complemented with field experiments at the Hodaka Research Station in Gifu Prefecture (Kyoto University), in order to test the possibilities of the method in a "real life" environment.
During these experiments, the data processing has revealed that the sediment concentration of water in-flow was modifying the radar signal velocity, therefore further experiments and numerical simulations will be performed this year (second year) to clarify the relation between sediment concentration and the radar data.
For this purpose, the second year research will include (1) Further research at the flume of Gomez laboratory; (2) experiments at a different test watershed, in order to compare the results of different sediment chemistry; and (3) using the Maxwell's equations of electromagnetisms, the results will be simulated in order to better understand the wave propagation process and what can be expected for different watersheds.
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| 現在までの達成度 (区分) |
現在までの達成度 (区分)
2: おおむね順調に進展している
理由
The research is progressing smoothly, and the influence of the chemistry of sediments has been discovered to play a more important role than expected, and further work will be performed in this area as well.
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| 今後の研究の推進方策 |
This year, (1) further laboratory experiments will be performed, (2) tests at another watershed will be performed (most probably the ERI of Tokyo University); (3) numerical simulation of the results will be performed.
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