| Project/Area Number |
11650520
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
水工水理学
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| Research Institution | TOHOKU UNIVERSITY |
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Principal Investigator |
SAWAMOTO Masaki TOHOKU UNIVERSITY, GRADUATE SCHOOL OF ENGINEERING, PROFESSOR, 大学院・工学研究科, 教授 (90016519)
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| Co-Investigator(Kenkyū-buntansha) |
MANO Akira TOHOKU UNIVERSITY, GRADUATE SCHOOL OF ENGINEERING, PROFESSOR, 大学院・工学研究科, 教授 (50111258)
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| Project Period (FY) |
1999 – 2001
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| Project Status |
Completed (Fiscal Year 2001)
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| Budget Amount *help |
¥3,400,000 (Direct Cost: ¥3,400,000)
Fiscal Year 2001: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 2000: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 1999: ¥1,400,000 (Direct Cost: ¥1,400,000)
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| Keywords | Sediment Movement / Abukuma River / Sendai Bay Coast / Sediment Balance / River Mouth Process / 総合土砂収支 / 漂砂 / 海岸侵食 / 海岸浸食 |
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| Research Abstract |
1. Reexamining the results of field survey on the Abukuma River mouth morphology conducted by ourselves since 1984, sediment movement and sediment balance were studied from various time scale of view. It was shown that the estury have a function as a pocket for sediment and the time scale of sediment movement are controled by the ratio of this volume and the sediment flux by the external forces.
2. A water runoff and sediment discharge of thle Abukuma River was modeled from the upper reach to the river mouth and the sediment supply from the river to the Sendai Bay Coast was reasonably evaluated.
3. Morphology changes, sendiment characteristics and waves along the Sendai Bay Coast and the Fukushima Coast were examined and the sediment balance of the Sendai Bay Coast was evaluated quantatively.
4. Combining the above results, the total sediment movement was evaluated both along the Abukuma River and the Sendai Bay Coast. It was pointed out that the Sendai Bay Coast was changed its state from dynamic equilibrium to the unequilibrium state because of lack of sediment supply and the obstraction of sand drift along the coast.
5. The engineering measures were considered for the unequilibrium state of sediment along the Sendai Bay Coast.
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