 |
| Titel |
Numerical simulation of the submarine landslides and tsunami occurred at Port Valdez, AK during 1964 Alaska Earthquake with Landslide-HySEA model |
| VerfasserIn |
Jose M. González-Vida, Sergio Ortega, Jorge Macías, Manuel J. Castro, Cipriano Escalante |
| Konferenz |
EGU General Assembly 2017
|
| Medientyp |
Artikel
|
| Sprache |
en
|
| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250153960
|
| Publikation (Nr.) |
 EGU/EGU2017-19000.pdf |
|
|
|
|
|
| Zusammenfassung |
| This is a benchmark problem recently proposed in the framework of the Landslide
Tsunami Model Benchmarking Workshop organized by the NTHMP (National
tsunami Hazard mitigation program –USA-) at Galveston (USA). The benchmark is
based on the historical event which occurred at Port Valdez, AK during the Alaska
Earthquake of March 27, 1964. The great disaster during the Mw9.2 Alaska Earthquake
happened in the dock and harbour area of Port Valdez, where a massive submarine
landslide generated a tsunami, inundating the waterfront up to two blocks inland.
Then, a second wave crossed the waterfront 10-15 minutes after the first wave,
carrying a large amount of the debris. It has been described as a violent surging
wave only slightly smaller than the first. It is believed that the second wave which
flooded the waterfront was originated at the other side of the Port Valdez near the
Shoup Bay moraine. The benchmark consists in simulating with the (GPU based)
Landslide-HySEA model the extent of inundation for two slide events, based on before and
after bathymetry data, eye-witness observations of the event, and observed runup
distribution. First, both landslides have been simulated separately, studying time
series of the water waves at determined locations, runups at different areas and
the extent of inundation around the first two blocks inland of Port Valdez. Then,
the two landslides are triggered at the same time and the joint effect is studied.
Obtained results are satisfactory and they agree with the existing observations.
References
Castro, M. J., Fernández-Nieto, E. D., González-Vida, J. M., Parés, C.
(2011). Numerical Treatment of the Loss of Hyperbolicity of the Two-Layer
Shallow-Water System. Journal of Scientific Computing, 48(1):16-40.
Fernández, E.H., Bouchut, F., Bresh, D., Castro, M.J. and, Mangeney, A. (2008).
A new Savage-Hutter type model for submarine avalanches and generated
tsunami. J. Comp. Phys., 227: 7720-7754.
Fernández-Nieto, E.D., Castro, M.J., Parés, C. (2011). On an Intermediate
Field Capturing Riemann Solver Based on a Parabolic Viscosity Matrix for the
Two-Layer Shallow Water System. J. Sci. Comp. 48:117-140.
Macías, J., Vázquez, J.T., Fernández-Salas, L.M., González-Vida, J.M.,
Bárcenas, P., Castro, M.J., Díaz-del-Río, and V., Alonso, B. (2015). The
Al-Boraní submarine landslide and associated tsunami. A modelling approach.
Marine Geology, 361:79-95. |
|
|
|
|
|
|