| 研究課題/領域番号 |
21K14253
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| 研究機関 | 北見工業大学 |
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研究代表者 |
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| 研究期間 (年度) |
2021-04-01 – 2024-03-31
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| キーワード | River flow / Acoustic tomography / Massive flood / River / Water resources |
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| 研究実績の概要 |
The main achievements of the current research are:
1. Demonstrating that the minimum number of acoustic stations to determine river flow direction in unidirectional streams can be reduced to three stations which can be more practical, easier, and cost effective.
2. Offering new guidelines to continuously estimate flow direction using a triangular distribution of tomographic systems.
3. Investigating long-term runoff records obtained from FAT in comparison with classical monitoring approaches in terms of the following aspects: Flood characteristics and the effects of dams on flood hydrograph. Backwater effects caused by river channel bends, sand bars, and floodplains. Duration and slope of the hydrograph and the impacts of rainfall and catchment on runoff hydrograph.
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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
According to the project framework, most of the main objectives of the second year were successfully implemented.
The main objectives of the second year were as follows:
1. To monitor the flood dynamics using the Fluvial Acoustic Tomography (FAT) by a triangular shaped deployment. In this observation, the principal investigator used two operating frequencies 54~58kHz. Moreover, two different types of transducers (omnidirectional sound beam and toroidal sound beams) for flood measurements. Although huge and massive floods did not occur during the observation period however, the proposed configuration showed high efficiency
2. Rainfall-runoff and turbidity behavior were deeply investigated and comprehensively discussed in terms of the effect of rainfall and catchment effects on the duration and slope of the hydrograph.
3. Effects caused by river channel bends, sand bars, and floodplains on the backwater dynamics.
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| 今後の研究の推進方策 |
Most of the field observations and objectives have been completed. The remaining issues related to publishing and sharing the research results in scientific journals, conferences, and scientific meetings, etc.
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| 次年度使用額が生じた理由 |
Since many plans were significantly affected by the COVID-19,several plans for conference meetings were postponed and/or cancelled which in turn restricted some of my plans. Accordingly,
I would like to use the unused remaining budget to publish and present the remaining research results in
the domestic and international conferences.
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