The Saint-Venant model for tsunami propagation simulation: Application to the 2011 Tohoku event

Abstract

Abstract:Beside a validation step of numerical models regarding academic tsunami test cases, one of the topic of the TANDEM project aims to qualify long distance propagation models on real tsunami events. In this context, the Saint-Venant model is used to simulate the 2011 Tohoku tsunami in Japan. The numerical resolution is based on a well-balanced finite volumes solver on unstructured mesh. The results are compared to available near and far shore in-situ data. The numerical accuracy is improved by the use of an adaptive mesh refinement method. The relevancy of a non-dispersive model for this event is then discussed.

Saint-Venant and Navier-Stokes Models for Tsunami Simulations

“…25), and better than the preliminary results obtained with the same code based on simplified hypotheses, especially about the Note that the free surface color scale is chosen to highlight the large scale propagation but the leading wave is much higher than 1 m when approaching the coast. source model [19]. Therefore, wave amplitudes and phases are well represented for all buoys, except for the farthest buoy from the source (GPS 806) where a slight underestimation of the wave amplitude is observed.…”

“…It broke a lot of seawalls and breakwaters of the Japan coastline, which were designed for smaller critical events. The Tohuku-Oki tsunami has been studied by many authors and reproduced with different numerical models such as [16][17][18][19]. Simulation is here carried out with the SV code using the AMR (Adaptive Mesh Refinement) method.…”

Saint Venant and Navier-Stokes Models for Tsunami Simulations

“…It broke a lot of seawalls and breakwaters of the Japan coastline, which were designed for smaller critical events. The Tohuku-Oki tsunami has been studied by many authors and reproduced with different numerical models such as [15], [16], [17] and [18]. Simulation is here…”

“…especially about the source model [18]. Therefore, wave amplitudes and phases are well represented The 2D SV model is very performing for large scale tsunami propagation simulation.…”