Two‐Dimensional Numerical Modeling of Large Wood Transport in Bended Channels Considering Secondary Current Effects
Details
Serval ID
serval:BIB_00917278F8D4
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Two‐Dimensional Numerical Modeling of Large Wood Transport in Bended Channels Considering Secondary Current Effects
Journal
Water Resources Research
ISSN
0043-1397
1944-7973
1944-7973
Publication state
Published
Issued date
12/2023
Peer-reviewed
Oui
Volume
59
Number
12
Language
english
Abstract
The modeling of large wood (LW) transport in rivers has received increasing interest from researchers in the last decade due to the widely recognized role of LW concerning flooding risk. For this purpose, few 2D depth-averaged hydraulic models have been coupled with LW transport models. However, such models usually neglect the effects of secondary currents on LW trajectories in river bends. In this work, the model Iber-Wood was enhanced to simulate the effects of secondary currents in river bends on LW trajectories. The proposed methodology presents a new formulation for considering secondary current effects on the flow field derived from the Manning formula and considers a new approach for reproducing the surface flow field that develops at channel bends. The enhanced model was tested to reproduce a series of laboratory experiments on wood transport in a sharp channel bend. The methodology introduces two new parameters in the model related to the secondary current effects, that is, the secondary current intensity and the adaptation length. These parameters were calibrated using available data from laboratory experiments. The good agreement between observed and simulated dowel trajectories in a sharp channel bend validated the proposed approach to simulate LW transport in the case of secondary currents.
Keywords
2D modeling, flume experiments, helical flow, hydrodynamics, Iber model, meandering rivers
Web of science
Open Access
Yes
Create date
13/03/2024 13:57
Last modification date
22/05/2024 6:00