130428 20240125162930.0 doi 10.2166/hydro.2013.153 sideral 80708 ART-2013-80708 eng Carmelo Juez, Javier Universidad de Zaragoza (orcid)0000-0002-2985-1023 Numerical assessment of bed-load discharge formulations for transient flow in 1D and 2D situations. Autores 2013 Two-dimensional (2D) transient flow over an erodible bed can be modelled using shallow-water equations and the Exner equation to describe the morphological evolution of the bed. Considering the fact that well-proven capacity formulae are based on one-dimensional (1D) experimental steady flows, the assessment of these empirical relations under unsteady 1D and 2D situations is important. In order to ensure the reliability of the numerical experimentation, the formulation has to be general enough to allow the use of different empirical laws. Moreover, the numerical scheme must handle correctly the coupling between the 2D shallow-water equations and the Exner equation under any condition. In this work, a finite-volume numerical scheme that includes these two main features will be exploited here in 1D and 2D laboratory test cases. The relative performances of Meyer-Peter and Müller, Ashida and Michiue, Engelund and Fredsoe, Fernandez Luque and Van Beek, Parker, Smart, Nielsen, Wong and Camenen and Larson formulations are analysed in terms of the root mean square error. A new discretization of the Smart formula is provided, leading to promising predictions of the erosion/deposition rates. The results arising from this work are useful to justify the use of an empirical sediment bed-load discharge formula among the ones studied, regardless of the hydrodynamic situation. Access copy available to the general public Unrestricted info:eu-repo/semantics/openAccess by http://creativecommons.org/licenses/by/3.0/es/ 1.336 2013 ENGINEERING, CIVIL 38 / 124 = 0.306 2013 Q2 T1 WATER RESOURCES 35 / 81 = 0.432 2013 Q2 T2 ENVIRONMENTAL SCIENCES 124 / 215 = 0.577 2013 Q3 T2 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS 57 / 101 = 0.564 2013 Q3 T2 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Murillo Pilar García-Navarro Universidad de Zaragoza (orcid)0000-0002-1386-5543 5001 600 Universidad de Zaragoza Dpto. Ciencia Tecnol.Mater.Fl. Área Mecánica de Fluidos 15, 4 (2013), 1234-1257 J. hydroinform. JOURNAL OF HYDROINFORMATICS 1464-7141 2139108 http://zaguan.unizar.es/record/130428/files/texto_completo.pdf Versión publicada 1701580 http://zaguan.unizar.es/record/130428/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:130428 articulos driver 2024-01-25-15:09:58 ARTICLE