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| Titel |
Potential inundation of Lisbon downtown by a 1755-like tsunami |
| VerfasserIn |
M. A. Baptista, J. M. Miranda, R. Omira, C. Antunes |
| 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 ; 11, no. 12 ; Nr. 11, no. 12 (2011-12-16), S.3319-3326 |
| Datensatznummer |
250009835
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| Publikation (Nr.) |
 copernicus.org/nhess-11-3319-2011.pdf |
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| Zusammenfassung |
| In this study, we present 10 m resolution tsunami flooding maps for Lisbon
downtown and the Tagus estuary. To compute these maps we use the present bathymetry
and topographic maps and a reasonable estimate for the maximum credible tsunami
scenario. Tsunami modeling was made with a non-linear shallow water model using
four levels of nested grids. The tsunami flood is discussed in terms of flow depth, run-up height
and maximum inundation area. The results show that, even today, in spite of
the significant morphologic changes in the city river front after the 1755 earthquake, a
similar event would cause tsunami flow depths larger than one meter in a large area
along the Tagus estuary and Lisbon downtown. Other areas along the estuary with a high
population density would also be strongly affected. The impact of the tide on the extent
of tsunami inundation is discussed, due to the large amplitude range of the tide in
Lisbon, and compared with the historical descriptions of the 1755 event. The results
presented here can be used to identify the potential tsunami inundation areas in Lisbon;
this identification comprises a key element of the Portuguese tsunami emergency management system. |
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