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| Titel |
Modeling propagation and inundation of the 11 March 2011 Tohoku tsunami |
| VerfasserIn |
F. Løvholt, G. Kaiser, S. Glimsdal, L. Scheele, C. B. Harbitz, G. Pedersen |
| 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 ; 12, no. 4 ; Nr. 12, no. 4 (2012-04-16), S.1017-1028 |
| Datensatznummer |
250010699
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| Publikation (Nr.) |
 copernicus.org/nhess-12-1017-2012.pdf |
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| Zusammenfassung |
| On 11 March 2011 the Tohoku tsunami devastated the east coast of
Japan, claiming thousands of casualties and destroying coastal settlements
and infrastructure. In this paper tsunami generation, propagation, and
inundation are modeled to hindcast the event. Earthquake source models with
heterogeneous slips are developed in order to match tsunami observations,
including a best fit initial sea surface elevation with water levels up to
8 m. Tsunami simulations were compared to buoys in the Pacific, showing good
agreement. In the far field the frequency dispersion provided a significant
reduction even for the leading wave. Furthermore, inundation simulations
were performed for ten different study areas. The results compared well with
run-up measurements available and trim lines derived from satellite images,
but with some overestimation of the modeled surface elevation in the northern part of the Sanriku coast. For inundation modeling
this work aimed at using freely available, medium-resolution data for
topography, bottom friction, and bathymetry, which are easily
accessible in the framework of a rapid assessment. Although these data come
along with some inaccuracies, the results of the tsunami simulations suggest
that their use is feasible for application in rapid tsunami hazard
assessments. A heterogeneous source model is essential to simulate the
observed distribution of the run-up correctly, though. |
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