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| Titel |
How study of hurricane swell can help to provide a better prediction of the tsunami wave propagation on Caribbean coasts? |
| VerfasserIn |
Jean-François Dorville, Frédéric Dondin, Raphael Cécé, Didier Bernard |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250092230
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| Publikation (Nr.) |
 EGU/EGU2014-6561.pdf |
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| Zusammenfassung |
| Prediction of tsunami wave propagation on a complex bathymetry can be fatal. Do a mistake
on the location of the tsunami wave impact on the coast is highly dangerous. The
destruction due to mechanical impact or submersion of the large area of the coast
zone can be avoid with a good estimation (i.e.; height, location, duration) of the
hazard. Features of the propagation are important in term of values but also in term of
dynamic, an evacuation plan is directly base on the prediction of the sequence of
events.
The frequency of large tsunami is low, but the study of real case may help to have a complete
comprehension of the process. We would be better prepare for a tsunami if we had more
tsunami.
Caribbean arc was generated by an intense tectonic motion and volcanic activity. The risk
of tsunami is high in the area both generated by tectonic motion and volcanic landslide. The
quality of a numerical propagation of tsunami is highly dependent of the quality
of the DEM Caribbean coast are impact by large Hurricane wave. The study of
those can be helpful in the tsunami study, particularly for the bathymetry effect on
large wave. The shape of the both types of wave are not the same, we do not try to
do a direct comparison, but used the information of the dispersion of large swell
wave to applied it to the tsunami dispersion and fill the lack of information of the
bathymetry.
We focus on the comparative study of the propagation of tsunami wave generated
by submarine volcano land slide and hurricane wave on a small scale bathymetry
(10m, Lito3d). The case of Guadeloupe and Martinique island are detailed in
this study, due to the available dataset. We used those two territories as reference
area.
The numerical propagation of the waves is done with FUNWAVE on two different
bathymetry (10m & 50m). The tsunami wave was generated by VolcFlow in case of
submarine volcano collapse and the swell determine by coupling of WaveWatchIII and
SWAN in case of past Hurricane. The information gathered by the propagation of a past study
will help to correct the bathymetry and have a best prediction of the propagation of a tsunami
wave. The result is applied on other Caribbean islands to improve the prediction method of
tsunami wave propagation. |
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