Hiromi KANO

Numerical Experiment for Behavior of Flood Flow with Fine Geographical Information

Tokuzou HOSOYAMADA

In recent years, many of the floods which have happened in urban area have affected serious damages. To show a hazard map is suggested as the effective strategy for these disaster.
However, there are some technological problems about flood flow simulation; the grid size is too large to express the overflow of river which is small-size to medium-size, and it is no considered about an overflow occurred inside a bank.

Overland flood flow model has been already developed separately. The main purpose of this study is to develop an overland flood flow model considering the flow of drainage channel.
The first half, this study introduces the new algorithm about the flow of drainage channel. And the calculation is tried for imaginary drainage channel. The second half, it combined the two models (the overland flood flow model and the flow model of drainage channel) and tried to calculate.
Finally, by using this new model, a flow of drainage channel can be reflected in the numerical simulation of overland flood flow.