| Project/Area Number |
16560450
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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 | Kumamoto University |
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Principal Investigator |
YAMADA Fumihiko Graduate School of Kumamoto University, Associate Professor, 大学院自然科学研究科, 助教授 (60264280)
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| Co-Investigator(Kenkyū-buntansha) |
OTANI Jun Graduate School of Kumamoto University, Professor, 大学院自然科学研究科, 教授 (30203821)
YUHI Masatoshi Graduate School of Kanazawa University, Associate Professor, 大学院・自然科学研究科, 助教授 (20262553)
YOKOYAMA Katsuhide Graduate School of Tokyo Metropolitan University, Associate Professor, 工学部, 准教授 (10347271)
KAKINOKI Tetsuya Kobe City College, Dept. of Civil Eng., Associate Professor, 助教授 (50353298)
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| Project Period (FY) |
2004 – 2006
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| Project Status |
Completed (Fiscal Year 2006)
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| Budget Amount *help |
¥3,700,000 (Direct Cost: ¥3,700,000)
Fiscal Year 2006: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 2005: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 2004: ¥1,900,000 (Direct Cost: ¥1,900,000)
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| Keywords | Intertidal Zone / Sediment Transport / Average Sea level / Seasonal Change / Morphological Change / Field Observation |
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| Research Abstract |
The water depth, flow velocity, salinity and suspended sediment concentration on an intertidal mudflat in the vicinity of a river mouth were measured for 564 wet cycles during July 2004 to October 2005. The measured time series were analyzed using time averaging to extract the wave components as well as tidal phase averaging to obtain typical variations and variability during the wet cycles. The wave component varied little during the wet cycle and was significant in the measured velocities. The variability of the time-averaged quantities for the 564 wet cycles was considerable but the deviations from the phase-averaged values were correlated very little. As a result, the phase-averaged water fluxes and suspended sediment fluxes were approximately the same as those estimated using the phase-averaged water depth, velocities and concentration. The phase-averaged quantities were used to understand the temporal variations of the flow and sediment transport during one typical wet cycle which appeared to be influenced by the local bathymetry and the river discharge.
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