Article (Scientific journals)
Floodplain Backwater Effect on Overtopping Induced Fluvial Dike Failure
Rifai, Ismail; El kadi Abderrezzak, Kamal; Erpicum, Sébastien et al.
2018In Water Resources Research
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Keywords :
Breach; floodplain confinement; fluvial dike; non-cohesive; overtopping; Tailwater effect; Flood risk; Dike breaching; Flood; Flooding; Dam breaching; Flood risk management; Digue fluviale; Rupture de digue; Inondation; Crue; Gestion du risque d'inondation
Abstract :
[en] Fluvial dikes (i.e. levees) can be damaged by overtopping flows, leading to breach formation and severe floods. Accurate prediction of the breach geometry and outflow hydrograph is crucial to achieve sound inundation risk assessment and mitigating measures. A set of laboratory experiments were performed to study overtopping induced fluvial dike breaching. The effects of floodplain tailwater on the breach expansion and outflow were investigated. Results are compared to previous experiments under different main channel inflow discharges combined with a free floodplain. The dike breaching process follows three stages: gradual start of overtopping and slow initiation of dike erosion, fast deepening and widening of the breach with highly transient flows, and flow quasi-stabilization with or without sustained breach expansion. Using the recorded data, a simplified regression model relating the breach stabilization time and the final breach width to the floodplain confinement and inflow Froude number in the main channel is proposed.
Research center :
UEE - Urban and Environmental Engineering - ULiège
Disciplines :
Civil engineering
Author, co-author :
Rifai, Ismail ;  EDF R&D, National Laboratory for Hydraulics and Environment, Saint Venant Laboratory for Hydraulics, Chatou, France , and ArGEnCo Department, Research Group Hydraulics in Environmental and Civil Engineering (HECE), University of Liège, Liège, Belgium
El kadi Abderrezzak, Kamal;  EDF R&D, National Laboratory for Hydraulics and Environment (LNHE) and Saint-Venant Laboratory for Hydraulics (LHSV), Chatou, France
Erpicum, Sébastien  ;  Université de Liège - ULiège > Scientifiques attachés au Doyen (Sc.appliquées)
Archambeau, Pierre  ;  Université de Liège - ULiège > Département ArGEnCo > HECE (Hydraulics in Environnemental and Civil Engineering)
Violeau, Damien;  EDF R&D, National Laboratory for Hydraulics and Environment (LNHE) and Saint-Venant Laboratory for Hydraulics (LHSV), Chatou, France
Pirotton, Michel ;  Université de Liège - ULiège > Département ArGEnCo > HECE (Hydraulics in Environnemental and Civil Engineering)
Dewals, Benjamin  ;  Université de Liège - ULiège > Département ArGEnCo > Hydraulics in Environmental and Civil Engineering
Language :
English
Title :
Floodplain Backwater Effect on Overtopping Induced Fluvial Dike Failure
Publication date :
2018
Journal title :
Water Resources Research
ISSN :
0043-1397
eISSN :
1944-7973
Publisher :
Wiley, United States - District of Columbia
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 16 August 2018

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