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| Titel |
Impact of a 1755-like tsunami in Huelva, Spain |
| VerfasserIn |
V. V. Lima, J. M. Miranda, M. A. Baptista, J. Catalão, M. González, L. Otero, M. Olabarrieta, J. A. Álvarez-Gómez, E. Carreño |
| 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 ; 10, no. 1 ; Nr. 10, no. 1 (2010-01-26), S.139-148 |
| Datensatznummer |
250007884
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| Publikation (Nr.) |
 copernicus.org/nhess-10-139-2010.pdf |
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| Zusammenfassung |
| Coastal areas are highly exposed to natural hazards associated with the sea.
In all cases where there is historical evidence for devastating tsunamis, as
is the case of the southern coasts of the Iberian Peninsula, there is a need
for quantitative hazard tsunami assessment to support spatial planning. Also,
local authorities must be able to act towards the population protection in a
preemptive way, to inform "what to do" and "where to go" and in an alarm,
to make people aware of the incoming danger. With this in mind, we
investigated the inundation extent, run-up and water depths, of a 1755-like
event on the region of Huelva, located on the Spanish southwestern coast, one
of the regions that was affected in the past by several high energy events,
as proved by historical documents and sedimentological data. Modelling was
made with a slightly modified version of the COMCOT (Cornell Multi-grid
Coupled Tsunami Model) code. Sensitivity tests were performed for a single
source in order to understand the relevance and influence of the source
parameters in the inundation extent and the fundamental impact parameters. We
show that a 1755-like event will have a dramatic impact in a large area close
to Huelva inundating an area between 82 and 92 km2 and reaching maximum
run-up around 5 m. In this sense our results show that small variations on
the characteristics of the tsunami source are not too significant for the
impact assessment. We show that the maximum flow depth and the maximum run-up
increase with the average slip on the source, while the strike of the fault
is not a critical factor as Huelva is significantly far away from the
potential sources identified up to now. We also show that the maximum flow
depth within the inundated area is very dependent on the tidal level, while
maximum run-up is less affected, as a consequence of the complex morphology
of the area. |
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