Contributors: Universidade da Coruña; Universidade de Vigo; Institut des Géosciences de l’Environnement (IGE); Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ); Université Grenoble Alpes (UGA); Funding for open access charge: Universidade da Coruña/CISUG O.G.-F. was supported by the postdoctoral fellowship ‘‘Juan de la Cierva’’ (ref. JDC2022-048667-I), funded by MCIN/AEI/10.13039/50 1100011033 and the European Union ‘‘NextGenerationEU’’/PRTR; by the Spanish Ministerio de Universidades under application 33.50.460A. 752, by the European Union NextGenerationEU/PRTR through a contract Margarita Salas from the University of Vigo; by the IGE lab and by the French Ministry of Environment (Direction Générale de la Prévention des Risques Ministère de la Transition Écologique et Solidaire) within the multirisk agreement SRNH-IRSTEA 2020 (Action TorRex).; ANR-10-LABX-0056,OSUG@2020,Innovative strategies for observing and modelling natural systems(2010); ANR-10-EQPX-0029,EQUIP@MESO,Equipement d'excellence de calcul intensif de Mesocentres coordonnés - Tremplin vers le calcul petaflopique et l'exascale(2010); ANR-11-LABX-0030,TEC XXI,Ingénierie de la Complexité : la mécanique et ses interfaces au service des enjeux sociétaux du 21iè(2011)
نبذة مختصرة : International audience ; We present the implementation of a new fully distributed multiclass soil erosion module. The model is based on a 2D finite volume solver (Iber+) for the 2D shallow water equations that computes the overland flow water depths and velocities. From these, the model evaluates the transport of sediment particles due to bed load and suspended load, including rainfall-driven and runoff-driven erosion processes, and using well-established physically-based formulations. The evolution of the mass of sediment particles in the soil layer is computed from a mass conservation equation for each sediment class. The solver is implemented using High Performance Computing techniques that take advantage of the computational capabilities of standard Graphical Processing Units, achieving speed-ups of two orders of magnitude relative to a sequential implementation on the CPU. We show the application and validation of the model at different spatial scales, ranging from laboratory experiments to meso-scale catchments.
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