| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2011: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2010: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2009: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Research Abstract |
Numerical model for gravel transport and quasi-3D numerical model for flood flows were developed. The model for gravel transport links grain size distributions in the bed load, surface layer and subsurface with the gravel transfer function. The quasi-3D model uses the vertically averaged and moment equations as governing equations to allow for the incorporation of pre-assumed linear distribution of horizontal velocity and quadratic vertical velocity and pressure distributions. These models are also based on finite volume method with approximate Riemann solver. Through the verification against experimental data, these models have ability to reproduce the process of bed degradation and aggradation with aromouring and downstream fining as well as the complex behavior of the flows in curved channel and in river confluence.
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