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| Unveiling the consequences of your breach growth model choice Peeters, P.; Heredia Gomez, M.; Van Damme, M.; Visser, P.J. (2016). Unveiling the consequences of your breach growth model choice, in: Lang, M. et al. (Ed.) 3rd European Conference on Flood Risk Management, 18th - 20th October 2016, Lyon, France (FLOODrisk2016): book of abstracts. pp. 54
In: Lang, M. et al. (Ed.) (2016). 3rd European Conference on Flood Risk Management, 18th - 20th October 2016, Lyon, France (FLOODrisk2016): book of abstracts. EDP Sciences: [s.l.]. 424 pp.
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| Documenttype: Congresbijdrage | |
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| Abstract |
The main use of breaching models includes two tasks: predicting breach characteristics and estimating flow through the breach. The breach growth models considered in this study are the following: breaching module of Mikell, HR Breach (InfoWorks RS), Verheij-van der Knaap breach formulae, BRES-Visser, AREBA-TUD. Besides a short description on how the dike breaching processes are taken into account by each model, selected model options are explained in the paper. The main conclusion of this modelling exercise would be that useful results can be obtained with all models starting from the same input regarding the strength parameters. However, in some cases foreknowledge comes in handy or is even needed. In addition, as most models take only a (limited) set of breaching mechanisms into account, the use of today's state-ofthe- art breach growth models is not entirely straightforward. To be more precise, whether retrograde surface erosion and/or upstream headcut migration are accounted for or not, will have an important influence on the timing of the peak flow through the breach. Furthermore, even when stated that block failure is included in a model, a stepwise increase of the breach width was never observed in the model output. |
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