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| Titel |
Modeling the 1958 Lituya Bay mega-tsunami with a PVM-IFCP GPU-based model |
| VerfasserIn |
Jose M. González-Vida, Diego Arcas, Marc de la Asunción, Manuel J. Castro, Jorge Macías, Sergio Ortega, Carlos Sánchez-Linares, Vasily Titov |
| Konferenz |
EGU General Assembly 2013
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250083971
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| Zusammenfassung |
| In this work we present a numerical study, performed in collaboration with the NOAA Center
for Tsunami Research (USA), that uses a GPU version of the PVM-IFCP landslide model for
the simulation of the 1958 landslide generated tsunami of Lituya Bay. In this model, a layer
composed of fluidized granular material is assumed to flow within an upper layer of an
inviscid fluid (e. g. water). The model is discretized using a two dimensional PVM-IFCP
[Fernández - Castro - Parés. On an Intermediate Field Capturing Riemann Solver Based on a
Parabolic Viscosity Matrix for the Two-Layer Shallow Water System, J. Sci. Comput., 48
(2011):117-140] finite volume scheme implemented on GPU cards for increasing the
speed-up.
This model has been previously validated by using the two-dimensional physical
laboratory experiments data from H. Fritz [Lituya Bay Landslide Impact Generated
Mega-Tsunami 50th Anniversary. Pure Appl. Geophys., 166 (2009) pp. 153-175]. In the
present work, the first step was to reconstruct the topobathymetry of the Lituya Bay before
this event ocurred, this is based on USGS geological surveys data. Then, a sensitivity analysis
of some model parameters has been performed in order to determine the parameters that
better fit to reality, when model results are compared against available event data, as run-up
areas.
In this presentation, the reconstruction of the pre-tsunami scenario will be shown, a
detailed simulation of the tsunami presented and several comparisons with real data (runup,
wave height, etc.) shown. |
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