2016 Volume 22 Pages 133-138
The Arakawa river has a plan to build new three retarding basins in the middle reach. It is important to understand flood control functions in middle stream of the Arakawa river with wide and vegetated flood channels. It is necessary to understand flood inundation mechanism on wide flood channels by flood flow analysis. Laser profilers can make use of the creation of detailed topographic maps of such flood channels, but may count the top height of vegetation on the ground. In this paper, filtering techniques of the laser profiler data are developed for reproducing proper ground heights of flood channels in the Arakawa river. Finally, the new flood analysis which improved the existing flood analysis method is presented.
