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| Titel |
A shallow-flow model for the propagation of tsunamis over complex geometries and mobile beds |
| VerfasserIn |
D. A. S. Conde, M. A. V. Baptista, C. Sousa Oliveira, R. M. L. Ferreira |
| 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 ; 13, no. 10 ; Nr. 13, no. 10 (2013-10-16), S.2533-2542 |
| Datensatznummer |
250085532
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| Publikation (Nr.) |
 copernicus.org/nhess-13-2533-2013.pdf |
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| Zusammenfassung |
| A distinguishable feature of overland tsunami propagation is the
incorporation of solids within the flow column, either sediment from the
natural environment or remains from built infrastructure. This article
describes a 2DH (two-dimensional horizontal) mathematical model particularly
suited for tsunami propagation over complex and dynamic geometries, such as
river and estuarine mobile beds. The discretization scheme is based on a
finite-volume method using a flux-splitting technique featuring a reviewed
Roe–Riemann solver, with appropriate source-term formulations to ensure full
conservativeness. The model is validated with laboratory data and
paleo-tsunami evidence. As a forecasting application, it is applied to a
tsunami scenario in the Tagus estuary, an effort justified by the numerous
catastrophic tsunamis that are known to have struck this location over the
past two millennia. The obtained results show that, despite the significant
differences in Lisbon's layout and morphology, a 1755-like tsunami would
still inflict a devastating impact on this major city. |
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