Tsunami inundation and sediment transport in a sediment-limited embayment on American Samoa

Field observations and numerical simulations are used to explore tsunami inundation and sediment transport in an embayment (Fagafue Bay) on the north side of Tutuila, American Samoa during the 29 September 2009 South Pacific tsunami. Field observations of the nearshore bathymetry and topography, tsu...

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Bibliographic Details
Published in:Earth-science reviews 2011-07, Vol.107 (1-2), p.1-11
Main Authors: Apotsos, Alex, Gelfenbaum, Guy, Jaffe, Bruce, Watt, Steve, Peck, Brian, Buckley, Mark, Stevens, Andrew
Format: Article
Language:English
Subjects:
American Samoa
Calibration
Computer simulation
Deposition
dusting
Earth science
Mathematical models
numerical modeling
sediment deposition
Sediment transport
Sediments
Simulation
South Pacific tsunami
surveys
Topography
tsunami inundation
Tsunamis
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Summary:Field observations and numerical simulations are used to explore tsunami inundation and sediment transport in an embayment (Fagafue Bay) on the north side of Tutuila, American Samoa during the 29 September 2009 South Pacific tsunami. Field observations of the nearshore bathymetry and topography, tsunami flow depth and sediment deposition, and extent of movable sandy sediment remaining on the beach were collected during two field surveys approximately two and five weeks after the tsunami. Onshore measurements of flow depth at forty-eight locations indicate the wave inundated almost 250m onshore with a depth exceeding 7m locally. The tsunami deposited patchy areas of sediment up to 0.2m thick interspersed with a thin dusting (
ISSN:0012-8252
1872-6828
DOI:10.1016/j.earscirev.2010.11.001