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Communication Dans Un Congrès Année : 2020

Modelling of massive bedload deposition in a debris basin: cross comparison between numerical and small scale modelling

Résumé

A small-scale physical model was build and used to study deposition processes in a planned debris basin in the French Alps. Numerical simulations were then undertaken with a 2D depth-averaged hydraulic and morphologic numerical model in order to check its ca-pability to reproduce flow and bed changes in this steep and laterally unconfined case with coarse sediment. The paper focuses on the set-up of the numerical model, which en-ables to get results very similar to the physical model. Old and state-of-the-art formula-tions for friction law and for bedload transport equation were compared. More precisely, the best performance were obtained with a friction law valid for small relative flow depth and bedload transport formulation using a non-threshold equation.
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Dates et versions

hal-02935173 , version 1 (10-09-2020)

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  • HAL Id : hal-02935173 , version 1

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Matthieu Gonzales de Linares, Vincent Mano, Guillaume Piton, Alain Recking. Modelling of massive bedload deposition in a debris basin: cross comparison between numerical and small scale modelling. RiverFlow 2020, Jul 2020, Delft, Netherlands. ⟨hal-02935173⟩
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