| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2013: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2012: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2011: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Outline of Final Research Achievements |
This study propose models for the key processes of fluid mud dynamics, including vertical and horiontal fluxes of the muddy sedimnet. The diffusion flux model delivers quite reliable results for estimating erosion flux from the top of fluid mud layers under the comparison with the time series data measured by an acoustic Doppler velocimeter (ADV) system in the field. This study also derives analytical solutions, based on the Bingham fluid concept, of advection flux in the fluid mud layer on which external shear stress force is applied. Furthermore, estimation method of force condition that is crucial for simulation of sediment transport processes was also improved incorporating irregularity of wave effects on the bottom shear stress with a stochastic approach. The derived model is applied to estimate sediment transport rate combining with the fluid mud transport model showing reasonable results rather than a conventional methods with constant bottom shear stresses.
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