| Project/Area Number |
14550514
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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 | Kagoshima University |
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Principal Investigator |
NISHI Ryuichiro Kagoshima Univ., Faculty of Engineering, Associate Professor, 工学部, 助教授 (30189253)
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| Project Period (FY) |
2002 – 2004
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| Project Status |
Completed (Fiscal Year 2004)
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| Budget Amount *help |
¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 2004: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 2003: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 2002: ¥2,100,000 (Direct Cost: ¥2,100,000)
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| Keywords | Beach and dune scarp / shoreline change / beach erosion / filed study / numerical simulation / shore protection works / 海岸構造物 / 沿岸漂砂 |
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| Research Abstract |
Beach and dune scarps can be seen often after a typhoon, hurricane and northeaster. In general, beach scarp and resulted shoreline recession are computed using a cross-shore sediment transport model in EU countries and US. On the other hand, beach scarp due to longshore sediment transport mechanics has been often estimated using N-line model in Japan. There is still unknown factor to distinguish which process is dominant to cause beach and dune scarp in natural condition. Here, field studies were conducted after typhoons and evidence to proof that at least longshore process could cause beach scarp in sandy beach. Then, a quasi 3-D model to simulate a beach scarp generation is developed based on longshore sediment transport calculation and resulted shoreline position. The new concept is applied to an idealized bathymetry condition.
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