2023 Fiscal Year Final Research Report
Development of Advanced Sediment Replenishment Methodology for Bedload Continuity below Dams
| Project/Area Number |
21H01434
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Review Section |
Basic Section 22040:Hydroengineering-related
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| Research Institution | Kyoto University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
武藤 裕則 徳島大学, 大学院社会産業理工学研究部(理工学域), 教授 (40263157)
角 哲也 京都大学, 防災研究所, 教授 (40311732)
小柴 孝太 京都大学, 防災研究所, 助教 (80883157)
竹門 康弘 京都大学, 防災研究所, 准教授 (50222104)
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| Project Period (FY) |
2021-04-01 – 2024-03-31
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| Keywords | Sediment Replenishment / Morphological changes / Erosion processes / 2D numerical modeling / Optimization of SR / Imaged- based-technique / Habitat restoration |
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| Outline of Final Research Achievements |
The project aimed to create a real-time monitoring system and assessment approach for sediment replenishment (SR) in Naka River, Tokushima prefecture, Japan. The main practice involves adding sediment using artificial deposits or injections to restore downstream geomorphic ecology. We developed an image-based approach to detect the replenishment site's flow velocities and sediment erosion rates. We conducted a field visit and collected data from the Buech River in France. We established a two-dimensional model to simulate the hydro-morphological changes of SR in the Naka River. The impacts of flushing flow, replenished sediment, and the SR arrangement were assessed using morphological alterations and two scientific indicators (the transport ratio (TR) and the bed change indicator (BCI)). This project's findings can help predict the SR erosion processes and downstream geomorphological alterations of the SR.
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| Free Research Field |
Hydraulic Engineering
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| Academic Significance and Societal Importance of the Research Achievements |
The project offers valuable suggestions for improving the SR in the Naka River, including increasing the frequency of sediment flushing, improving the materials used in the SR, and building new SR stockpiles to ensure a consistent sediment supply during dry periods.
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