Reference : Floodplain Backwater Effect on Overtopping Induced Fluvial Dike Failure
Scientific journals : Article
Engineering, computing & technology : Civil engineering
http://hdl.handle.net/2268/227114
Floodplain Backwater Effect on Overtopping Induced Fluvial Dike Failure
English
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 mailto [Université de Liège - ULiège > > Scientifiques attachés au Doyen (Sc.appliquées) >]
Archambeau, Pierre mailto [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 mailto [Université de Liège - ULiège > Département ArGEnCo > HECE (Hydraulics in Environnemental and Civil Engineering) >]
Dewals, Benjamin mailto [Université de Liège - ULiège > Département ArGEnCo > Hydraulics in Environmental and Civil Engineering >]
In press
Water Resources Research
Wiley
Yes (verified by ORBi)
International
0043-1397
1944-7973
DC
[en] Breach ; floodplain confinement ; fluvial dike ; non-cohesive ; overtopping ; Tailwater effect ; Flood risk ; Dike breaching ; Flood ; Flooding ; Dam breaching ; Flood risk management
[fr] Digue fluviale ; Rupture de digue ; Inondation
[en] Crue ; Gestion du risque d'inondation
[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.
Urban and Environmental Engineering
Researchers ; Professionals
http://hdl.handle.net/2268/227114

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