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| Titel |
The tsunami geomorphology of coastal dunes |
| VerfasserIn |
J. R. Goff, E. Lane, J. Arnold |
| 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 ; 9, no. 3 ; Nr. 9, no. 3 (2009-06-12), S.847-854 |
| Datensatznummer |
250006791
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| Publikation (Nr.) |
 copernicus.org/nhess-9-847-2009.pdf |
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| Zusammenfassung |
| An examination of the coastal geomorphology of bays along
the Otago coastline, SE New Zealand, has identified a geomorphology
consistent with tsunami inundation. A tsunami geomorphology consisting of a
number of elements including dune pedestals, hummocky topography, parabolic
dune systems, and post-tsunami features resulting from changes to the
nearshore sediment budget is discussed. The most prominent features at
Blueskin Bay are eroded pedestals although it is speculated that hummocky topography
may be present in the bay. Tsunami geomorphology at Long Beach is more
comprehensive with a marked association between pedestals and a hummocky
topography. A full suite of potential geomorphological features however, is
not present at either site. The type of features formed by a tsunami, and
the ability to detect and interpret a tsunami geomorphology, hinges on the
interaction between five key variables; sand availability, embayment type,
nature of the coast, accumulation space, and landward environmental
conditions. An appreciation of the geomorphic setting and history of a coast
is therefore of fundamental importance when identifying what to look for and
where to look for tsunami evidence. It is also important to realise that
these features can also be formed by other processes. |
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