Author(s): Takehiro Oki, Makoto Nakatsugawa
Linked Author(s): Takehiro Oki
Keywords: iRIC SRM, back water, landside water, unsteady flow, flood analysis
Abstract:
The catchment basin of the Chitose River in the Ishikari River system, which is the basin under study, is on Japan’s northern island of Hokkaido. Several typhoons approach the area in summer and fall, and these frequently cause damage from river flooding. A heavy rainfall occurred around Lake Shikotsu, at the upper reaches of the Chitose River, in September 2014. At the time of this heavy rainfall, an unprecedented evacuation advisory was issued to about 0.9 million of the citizens of Sapporo. After the September 2014 flood, the authors concluded that real-time flooding and inundation predictions for localized rainfall and the largest-scale torrential rainfall, evacuation, and preparedness for operation of river management facilities (dams, retarding ponds, and drainage pump stations) were the most pressing needs for the administration and citizens. This study aims to serve as basic research for clarifying the influence of climate change and heavy rainfall, toward proposing a flood analysis model that is able to reproduce the large-scale inundation damages of the past and verifying the reproducibility of that model.
(2651, 66, 282)
Year: 2017