2007 Volume 13 Pages 195-200
The floodplain at the Kawasaka district in the Kita River was excavated through the special emergency project after the severe damage due to flooding by Typhoon No.19 in 1997. Monitoring survey of the destruction and the recovery process of the vegetation on the floodplain has been conducted after the river improvement work in 2001. In addition, the topographical changes of the floodplain due to the floods and the grain size of the bed materials of the floodplain have been surveyed. Furthermore, the flood flows before and after the improvement work were simulated to understand the topographical changes of the floodplain. Through examinations, we clarified how the vegetation was destroyed and recovered after improvement work in connecting with the topographical changes of the floodplain and the flood flows over the floodplain.
