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| Titel |
Using Polycyclic Aromatic Hydrocarbons (PAHs) as a chemical proxy to indicate Tsunami 2004 backwash in Khao Lak coastal area, Thailand |
| VerfasserIn |
D. Tipmanee, W. Deelaman, S. Pongpiachan, K. Schwarzer, P. Sompongchaiyakul |
| 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 ; 12, no. 5 ; Nr. 12, no. 5 (2012-05-14), S.1441-1451 |
| Datensatznummer |
250010811
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| Publikation (Nr.) |
 copernicus.org/nhess-12-1441-2012.pdf |
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| Zusammenfassung |
| In this study, we attempted to use PAHs as a chemical proxy to trace the
transport of land-derived materials caused by the tsunami backwash to
better understand how it may have affected the distribution of sedimentary
deposition throughout the seabed of Khao Lak coastal areas. By analyzing the
compositions of sedimentary PAHs in combination with application of the
multivariate descriptive statistical techniques, PAHs were proven to be a
promising chemical proxy to indicate the tsunami backwash in the study area.
Their spatial distribution could indicate that the tsunami backwash plays an
important role in transporting anthropogenic PAHs to the nearby coastal area
as far as approximately 25 km from the shoreline. In addition, the
results from diagnostic PAH isomer ratios suggested that road paving
asphalt, originated from heavy erosion by the tsunami wave in front of
Pakarang Cape, was among the identified sources of PAHs. Principle Component
Analysis (PCA) results provided 2 estimated land-derived sources of PAHs,
which were the road dust and oil burning sources. These estimated signature
sources clearly support our hypothesis that PAHs were transported from the
potential sources on land and deposited into the near-shore seabed during
tsunami backwash. |
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