How to make a 2D numerical morphodynamic model? - Office français de la biodiversité Accéder directement au contenu
Rapport (Rapport De Recherche) Année : 2023

How to make a 2D numerical morphodynamic model?

Résumé

The Public Health - Environmental Quality Department of the Grand Poitiers municipality ensures that the territory's biodiversity issues as well as the implementation of GEMAPI (Gestion des Milieux Aquatiques et Prévention des Inondations). Owner of transverse structures, Grand Poitiers conducts a preliminary re ection on the restoration of Ecological Continuity, in partnership with the PPRIME Institute of the University of Poitiers and the French Biodiversity Agency. To define a policy for the development of transverse structures, it is necessary to be able to evaluate the effects of this development on the sediment transport at the scale of rivers. Numerical hydromorphodynamic models, such as HEC-RAS, perform a 2D modeling based on the vertical integration of equations governing the physical mechanisms. This strategy reduces the cost of CPU time compared to 3D numerical models. However, the study on large time and space scales remains expensive in terms of CPU time. To correct this default, one solution is to use HydroSedFoam. By solving the Saint Venant Exner equations, HydroSedFoam allows to study the impact of transverse structures on the hydro-morphodynamic behavior of rivers. The main advantages of HydroSedFoam are to be developed under OPENFOAM (thus open sources) and to be parallelized to run on supercomputers such as the machines of the mesocenter of the University of Poitiers and the national center of calculations GENCI. In 2021, a first internship has allowed to implement the use of HydroSedFoam. A performance study must now be carried out to show the performance of HydroSedFoam compared to other 2D numerical hydro-morphodynamic models, such as HEC-RAS, to solve the Saint Venant Exner equations on large time and space scales. It is the objective of this scientific work.
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Dates et versions

hal-04486127 , version 1 (01-03-2024)

Identifiants

  • HAL Id : hal-04486127 , version 1

Citer

Anthony Beaudoin, Eshan Rezapour, Alaa Ghzayel. How to make a 2D numerical morphodynamic model?. Grand Poitiers; Institut Pprime; Office Français de la Biodiversité. 2023. ⟨hal-04486127⟩
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