129788 20240111114816.0 doi 10.1016/j.advwatres.2019.103444 sideral 114756 ART-2019-114756 eng Echeverribar, I. Universidad de Zaragoza (orcid)0000-0001-8221-523X 2D numerical simulation of unsteady flows for large scale floods prediction in real time 2019 The challenge of finding a compromise between computational time and level of accuracy and robustness has traditionally expanded the use simplified models rather than full two-dimensional (2D) models for flood simulation. This work presents a GPU accelerated 2D shallow water model for the simulation of flood events in real time. In particular, an explicit first-order finite volume scheme is detailed to control the numerical instabilities that are likely to appear when used in complex topography. The model is first validated with the benchmark test case of the Toce River (Italy) and numerical fixes are demonstrated to be necessary. The model is next applied to reproduce real events in a reach of the Ebro River (Spain) in order to compare simulation results with field data. The second case deals with a large domain (744 km2) and long flood duration (up to 20 days) allowing an analysis of the performance and speed-up achieved by different GPU devices. The high values of fit between observed and simulated results as well as the computational times achieved are encouraging to propose the use of the model as forecasting system. Access copy available to the general public Unrestricted info:eu-repo/grantAgreement/ES/MINECO-MCIU/PGC2018-094341-B-I00 info:eu-repo/semantics/openAccess by-nc-nd http://creativecommons.org/licenses/by-nc-nd/3.0/es/ 4.016 2019 WATER RESOURCES 11 / 94 = 0.117 2019 Q1 T1 1.536 2019 Water Science and Technology 2019 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Morales-Hernández, M. Universidad de Zaragoza (orcid)0000-0001-6961-7250 Brufau, P. Universidad de Zaragoza (orcid)0000-0002-0415-0001 García-Navarro, P. Universidad de Zaragoza (orcid)0000-0001-8674-1042 5001 600 Universidad de Zaragoza Dpto. Ciencia Tecnol.Mater.Fl. Área Mecánica de Fluidos 134 (2019), 103444 [17 pp.] Adv. water resour. Advances in Water Resources 0309-1708 730257 http://zaguan.unizar.es/record/129788/files/texto_completo.pdf Postprint 1211146 http://zaguan.unizar.es/record/129788/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:129788 articulos driver 2024-01-11-09:26:57 ARTICLE