| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2013: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
|
|---|
| Outline of Final Research Achievements |
Quasi 3D and 2D numerical model for flood flows, river-bed variation and its grain size distribution as well as quasi 2D numerical model for flood flows were developed to examine appropriate river channel management. The model for sediment transport linked grain size distributions in the bed load, surface layer and subsurface with the gravel transfer function. These model were based on finite volume method using numerical flux based on HLLC or FDS scheme. These models were verified against experimental data of flows and bed variation or observed water level and flood mark on the flood event. It showed that these models had ability to reproduce the behavior of flood flows and bed variation, but the more improvement were needed to predict it with reasonable accuracy. The disaster process of revetments in the Hikosan river were also examined through a field survey and numerical simulations of flood flow and the temporal river-bed variation.
|
