Extension of 2D shallow water models to hydrological modelling
2022
Cea, Luis | Bladé i Castellet, Ernest | García Feal, Orlando | Sanz Ramos, Marcos | Gómez Gesteira, Moncho | Farfán Durán, Juan Fernando | Universitat Politècnica de Catalunya. Departament d'Enginyeria Civil i Ambiental | Universitat Politècnica de Catalunya. Doctorat en Enginyeria Civil | Centre Internacional de Mètodes Numèrics en Enginyeria | Universitat Politècnica de Catalunya. FLUMEN - Dinàmica Fluvial i Enginyeria Hidrològica
In this paper we discuss some critical aspects that should be considered in order to extend and apply a numerical model based on the 2D shallow water equations(2D-SWE) to distributed hydrological modelling. We also detail the physical processes, numerical methods and High Performance Computing(HPC) techniques that have been implemented in the freely available software Iber, to enable its application to rainfall-runoff transformation and propagation at the catchment scale.The original version of Iber is coded in Fortran and it implements an unstructured finite volume solver for the 2D depth-averaged shallowwater equations to model open channel flow in rivers and is therefore representative of many 2D free surface flow models. Hydrological processes as infiltration, evapotranspiration, percolation and groundwater flow were implemented in the last version of the software. Specific numerical schemes for the discretization of the 2D-SWE in surface runoff applications were also included in the solver. A HPC version of the solver (Iber+) coded in C++ and parallelized for CPU using OpenMP and for GPU using Nvidia CUDA was also developed. After describing briefly those implementations, we present the validation of the model in two laboratory configurations, and its application to three real catchments.
Afficher plus [+] Moins [-]Part of the work presented in this paper was supported by the Spanish Ministry of Science and Innovation (Ministerio de Ciencia e Innovacion) within the project “SATURNO: Early warning against pluvial flooding in urban areas” (grant number PID2020-118368RB-I00).
Afficher plus [+] Moins [-]Postprint (published version)
Afficher plus [+] Moins [-]Mots clés AGROVOC
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