10:15 AM - 10:30 AM
[S04A-06] Refinement of W-grid Model for Efficient Simulation of Flood Inundation in Urban Area
Keywords:Numerical Simulation, Flood, Inundation
The W-grid model employs two scaled grid system: a fine grid for storing topographic data and a coarse grid for solving governing equations for simulating large scale flow phenomena efficiently. To apply the W-grid model to flood in an urban area, I improved the original W-grid model by considering the drag force by buildings and mass conservation at wet and dry area. The refined model was applied to the flood experiment in Sapporo city. The computational results showed that the present refined model can simulate the inundation at an urban area more accurately and efficiently than the common single grid model.