Comparison of two wave models for Gold Coast, Australia

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Title Comparison of two wave models for Gold Coast, Australia
Author Strauss, Darrell; Mirfenderesk, Hamid; Tomlinson, Rodger Benson
Journal Name Journal of coastal Research
Editor C.J. Lemckert
Year Published 2007
Place of publication United States
Publisher Coastal Education & Research Foundation, Inc.
Abstract Managing hazards associated with shoreline responses to extreme events and the provision of safe boating access is an ongoing concern for coastal authorities. The open sandy coastline of Gold Coast city is a wave dominated coast with a highly variable wave climate and a narrow continental shelf thus experiencing substantial variations in long-shore transport rates. Detailed wave transformation information is central to further investigations of sediment transport processes as complex bathymetry associated with trained river entrances and rocky headlands causes localised interruptions to the overall northward littoral drift. Temporal variations in wave energy are driven by a wide range of swell direction and size while spatial variations occur as a result of the strong refraction during particular swell events. This paper presents a comparison of two near shore wave models of the region using MIKE 21 and SWAN. The transformation of waves arriving from offshore is simulated using the models for selected time series of wave parameters. The parameterized boundary conditions are derived from NOAA Wave Watch III global wave model data. Model output is compared with observed data from existing wave recording buoys at Gold Coast Seaway and Point Lookout. The inclusion of wind in the modelling undertaken did not improve the models' accuracy and winds in excess of 10 ms-1 led to an over-estimation of significant wave height while increasing the processing time. Sheltering of the near-shore site during southerly swell conditions was well-represented by the modelling.
Peer Reviewed Yes
Published Yes
Publisher URI http://www.cerf-jcr.org/
Alternative URI http://www.griffith.edu.au/conference/ics2007/jcr.html
Copyright Statement Copyright 2007 Coastal Education and Research Foundation Inc (CERF). Please refer to the journal's website for access to the definitive, published version.
Volume SI
Issue Number 50
Page from 312
Page to 316
ISSN 0749-0208
Date Accessioned 2008-02-29
Language en_AU
Research Centre Griffith Centre for Coastal Management
Faculty Faculty of Science, Environment, Engineering and Technology
Subject PRE2009-Environmental Engineering Modelling
URI http://hdl.handle.net/10072/18958
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1

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