2025 • In Carnacina, Iacopo; Abdellatif, Mawada; Andredaki, Manolia (Eds.) Proceedings of the 12th International Conference on Fluvial Hydraulics, River Flow 2024
Computational performance; Dike breaching; Emergency plans; Modeling approach; Modelling strategies; Numerical modeling approach; Fluid Flow and Transfer Processes; Breaching; Fluvial dikes
Abstract :
[en] Failures of fluvial dikes often lead to devastating consequences in flood plains. Overtopping is the most frequent cause of dike failure. Numerical models are instrumental tools to assess the consequences of failure and guide emergency plans. Mul tiple modelling strategies exist regarding dike morphology and flow description, but also the coupling between them. The selected modelling strategy significantly influences the model’s accuracy and computational performance. Here, the accuracy and performance of two modelling approaches are compared against data from field experiments. The first modelling strategy consists in describing the flow and the morphologic evolution of the dike breach using a non-discretized dike breaching model. The second modelling strategy uses the dynamic coupling of a 2D hydrodynamic model with the breach evolu tion module of the non-discretized dike breaching model, whose goal is now limited to describing the dike breach morphodynamics. Overall, numerical models perform well in predicting the breach discharge evolution. However, the breach evolution module of the non-discretized model highly underestimates the breach expansion and should thus be revised in further studies.
Disciplines :
Civil engineering
Author, co-author :
Schmitz, Vincent ; Université de Liège - ULiège > Département ArGEnCo > HECE (Hydraulics in Environnemental and Civil Engineering)
Archambeau, Pierre ; Université de Liège - ULiège > Département ArGEnCo > HECE (Hydraulics in Environnemental and Civil Engineering)
Pirotton, Michel ; Université de Liège - ULiège > Département ArGEnCo > HECE (Hydraulics in Environnemental and Civil Engineering)
Erpicum, Sébastien ; Université de Liège - ULiège > Urban and Environmental Engineering
Dewals, Benjamin ; Université de Liège - ULiège > Département ArGEnCo > Hydraulics in Environmental and Civil Engineering
Language :
English
Title :
Comparison of numerical modelling approaches for fluvial dikes breaching
Publication date :
2025
Event name :
River Flow 2024
Event place :
Liverpool, United Kingdom
Event date :
02-09-2024 => 06-09-2024
Audience :
International
Main work title :
Proceedings of the 12th International Conference on Fluvial Hydraulics, River Flow 2024
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