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C3: A finite volume-finite difference hybrid model for tsunami propagation and runup

Abstract: A numerical model that couples Finite Difference and Finite Volume schemes has been developed for tsunami propagation and runup study. An explicit leap-frog scheme and a first order upwind scheme has been considered in the Finite Difference module, while in the Finite Volume scheme a Godunov Type method based on the f-waves approach has been used. The Riemann solver included in the model corresponds to an approximate augmented solver for the Shallow Water Equations (SWE) in the presence of variable bottom surface. With this hybrid model some of the problems inherent to the Godunov type schemes are avoided in the offshore region, while in the coastal area the use of a conservative method ensures the correct computation of the runup and wave breaking. The model has been tested and validated using different problems with a known analytical solution and also with laboratory experiments, considering both non breaking and breaking waves. The results are very satisfactory, showing that the hybrid approach is a useful technique for practical usages.

 Autoría: Olabarrieta M., Medina R., Gonzalez M., Otero L.,

 Fuente: Computers and Geosciences 2011, 37( 8), 1003-1014

 Editorial: Elsevier

 Fecha de publicación: 01/08/2011

 Tipo de publicación: Artículo de Revista

 DOI: 10.1016/j.cageo.2010.09.016

 ISSN: 0098-3004,1873-7803

 Url de la publicación: https://doi.org/10.1016/j.cageo.2010.09.016