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| Titel |
Sediment transport on the inner shelf off Khao Lak (Andaman Sea, Thailand) during the 2004 Indian Ocean tsunami and former storm events: evidence from foraminiferal transfer functions |
| VerfasserIn |
Y. Milker, M. Wilken, J. Schumann, D. Sakuna, P. Feldens, K. Schwarzer, G. Schmiedl |
| 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. 12 ; Nr. 13, no. 12 (2013-12-05), S.3113-3128 |
| Datensatznummer |
250085573
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| Publikation (Nr.) |
 copernicus.org/nhess-13-3113-2013.pdf |
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| Zusammenfassung |
| We have investigated the benthic foraminiferal fauna from sediment event
layers associated with the 2004 Indian Ocean tsunami and former storms that
have been retrieved in short sediment cores from offshore environments of
the Andaman Sea, off Khao Lak, western Thailand. Species composition and
test preservation of the benthic foraminiferal faunas exhibit pronounced
changes across the studied sections and provide information on the
depositional history of the tsunami layer, particularly on the source water
depth of the displaced foraminiferal tests. In order to obtain accurate
bathymetric information on sediment provenance, we have mapped the
distribution of modern faunas in non-tsunamigenic surface sediments and
created a calibration data set for the development of a transfer function.
Our quantitative reconstructions revealed that the resuspension of sediment
particles by the tsunami wave was restricted to a maximum water depth of
approximately 20 m. Similar values were obtained for former storm events,
thus impeding an easy distinction of different high-energy events. |
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