Modelling tsunami inundation on coastlines with characteristic form

Baldock, T. E., Barnes, M. P., Guard, P. A., Hie, Thomas, Hanslow, D., Ranasinghe, R., Gray, D. and Nielsen, O. (2007). Modelling tsunami inundation on coastlines with characteristic form. In: 16th Australasian Fluid Mechanics Conference (AFMC). 16th Australasian Fluid Mechanics Conference (AFMC), Gold Coast, Queensland, Australia, (939-942). 3-7 December, 2007.

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Author Baldock, T. E.
Barnes, M. P.
Guard, P. A.
Hie, Thomas
Hanslow, D.
Ranasinghe, R.
Gray, D.
Nielsen, O.
Title of paper Modelling tsunami inundation on coastlines with characteristic form
Conference name 16th Australasian Fluid Mechanics Conference (AFMC)
Conference location Gold Coast, Queensland, Australia
Conference dates 3-7 December, 2007
Proceedings title 16th Australasian Fluid Mechanics Conference (AFMC)
Journal name Proceedings of the 16th Australasian Fluid Mechanics Conference, 16AFMC
Place of Publication Brisbane, Australia
Publisher School of Engineering, The University of Queensland
Publication Year 2007
Year available 2007
Sub-type Fully published paper
Open Access Status File (Author Post-print)
ISBN 978-1-864998-94-8
Start page 939
End page 942
Total pages 4
Collection year 2007
Language eng
Abstract/Summary This paper provides an indication of the likely difference in tsunami amplification and dissipation between different characteristic coastal embayments, coastal entrances and estuaries. Numerical modeling is performed with the ANU/Geoscience Australia tsunami inundation model. Characteristic coastal morphology is represented by simpler generic morphological shapes which can be applied easily in the ANUGA model, such that key non-dimensional parameters (e.g. embayment depth/bay width) can be varied. Modeling is performed with a range of bay shapes, seabed gradient and different incident tsunami wave shapes and wave angles, including sine waves, solitary waves and leading depression Nwaves. The results show a complex pattern for both large and small embayments, with wave breaking an important control on the amplification of the wave between the 20m contour and the shore. For large embayments, the wave run-up can be amplified by a factor six in comparison to the amplitude at the model boundary. For small embayments, the amplification is dependent on the location of the ocean water line, or tidal stage.
Subjects 290000 Engineering and Technology
Keyword tsunami amplification
Characteristic coastal morphology
Characteristic coastal embayments
Q-Index Code E1

 
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Created: Thu, 20 Dec 2007, 11:35:56 EST by Bikash Das on behalf of School of Engineering