Author(s): Kengo Osada; Yoshihiko Shimizu; Kenji Kawaike; Mirei Sige-Eda; Shogo Kakehashi

Linked Author(s): Yoshihiko Shimizu, Kenji Kawaike

Keywords: Woody debris behavior; Flood flow; Inundation; Numerical simulation; DEM

Abstract: Woody debris jamming around bridge piers leads to bridge failure, overtopping flow and levee breach, and damage to houses caused by inundation flow with woody debris. A numerical analysis model to evaluate woody debris behaviors not only in rivers but also on floodplains is necessary to mitigate these disasters and design debris retention facilities. This study developed a numerical analysis model of woody debris behavior that can be applicable to rivers and floodplains. Fundamental experiments on woody debris behavior using a straight flume combined with a floodplain were carried out to validate the applicability of our present numerical model. As comparing numerical results with experimental data, it was found that this model can almost describe the processes of conveyance and accumulation of woody debris and the backwater level rising caused by woody debris jamming around bridge piers.

DOI: https://doi.org/10.3850/978-90-833476-1-5_iahr40wc-p0793-cd

Year: 2023