2003 Volume 9 Pages 143-148
The Flood Fighting Law revised in 2001 stipulates that areas that are expected to be inundated with overflowing river water during the design rainfall assumed for river development should be designated as flood hazard areas and that the flood hazard areas and the expected flood depths should be publicized, to minimize flood damage.
Such information should be provided to the public even for rapids such as the Joganji and Kurobe Rivers. Adequate information should be provided on rapids while considering their unique river channel and the characteristics of flooding because they exhibit unique flow and flooding patterns during a flood.
This study focuses on the following two topics to reduce flood damage in rapids.
· Assessment of calculation methods for identifying flooding while considering the characteristics of flooding from steep slope river.
· Preparation of a hazard map that reflects the characteristics of flooding from steep slope river.
