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Titel |
Landslide tsunami case studies using a Boussinesq model and a fully nonlinear tsunami generation model |
VerfasserIn |
P. Watts, S. T. Grilli, J. T. Kirby, G. J. Fryer, D. R. Tappin |
Medientyp |
Artikel
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Sprache |
Englisch
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ISSN |
1561-8633
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Digitales Dokument |
URL |
Erschienen |
In: Natural Hazards and Earth System Science ; 3, no. 5 ; Nr. 3, no. 5, S.391-402 |
Datensatznummer |
250001237
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Publikation (Nr.) |
copernicus.org/nhess-3-391-2003.pdf |
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Zusammenfassung |
Case studies of landslide tsunamis
require integration of marine geology data and interpretations into
numerical simulations of tsunami attack. Many landslide tsunami generation
and propagation models have been proposed in recent time, further
motivated by the 1998 Papua New Guinea event. However, few of these models
have proven capable of integrating the best available marine geology data
and interpretations into successful case studies that reproduce all
available tsunami observations and records. We show that nonlinear and
dispersive tsunami propagation models may be necessary for many landslide
tsunami case studies. GEOWAVE is a comprehensive tsunami simulation model
formed in part by combining the Tsunami Open and Progressive Initial
Conditions System (TOPICS) with the fully non-linear Boussinesq water wave
model FUNWAVE. TOPICS uses curve fits of numerical results from a fully
nonlinear potential flow model to provide approximate landslide tsunami
sources for tsunami propagation models, based on marine geology data and
interpretations. In this work, we validate GEOWAVE with successful case
studies of the 1946 Unimak, Alaska, the 1994 Skagway, Alaska, and the 1998
Papua New Guinea events. GEOWAVE simulates accurate runup and inundation
at the same time, with no additional user interference or effort, using a
slot technique. Wave breaking, if it occurs during shoaling or runup, is
also accounted for with a dissipative breaking model acting on the wave
front. The success of our case studies depends on the combination of
accurate tsunami sources and an advanced tsunami propagation and
inundation model. |
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