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| Titel |
Adaptive modelling of long-distance wave propagation and fine-scale flooding during the Tohoku tsunami |
| VerfasserIn |
S. Popinet |
| 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 (2012-04-27), S.1213-1227 |
| Datensatznummer |
250010714
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| Publikation (Nr.) |
 copernicus.org/nhess-12-1213-2012.pdf |
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| Zusammenfassung |
| The 11 March 2011 Tohoku tsunami is simulated using the quadtree-adaptive
Saint-Venant solver implemented within the Gerris Flow Solver. The spatial
resolution is adapted dynamically from 250 m in flooded areas up to
250 km for the areas at rest. Wave fronts are tracked at a resolution of 1.8 km
in deep water. The simulation domain extends over 73° of both
latitude and longitude and covers a significant part of the north-west
Pacific. The initial wave elevation is obtained from a source model derived
using seismic data only. Accurate long-distance wave prediction is
demonstrated through comparison with DART buoys timeseries and GLOSS tide
gauges records. The model also accurately predicts fine-scale flooding
compared to both satellite and survey data. Adaptive mesh refinement leads
to orders-of-magnitude gains in computational efficiency compared to
non-adaptive methods. The study confirms that consistent source models for
tsunami initiation can be obtained from seismic data only. However, while
the observed extreme wave elevations are reproduced by the model, they are
located further south than in the surveyed data. Comparisons with inshore
wave buoys data indicate that this may be due to an incomplete understanding
of the local wave generation mechanisms. |
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