Shoreward sand transport outside the surfzone, Northern Gold Coast, Australia

Patterson, D. C. (2012). Shoreward sand transport outside the surfzone, Northern Gold Coast, Australia. In: Patrick Lynett and Jane McKee Smith, Proceedings of the 33rd International Conference on Coastal Engineering 2012, ICCE 2012. 33rd International Conference on Coastal Engineering 2012, ICCE 2012, Santander, Cantabria, Spain, (). 1-6 July 2012. doi:10.9753/icce.v33.sediment.26

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Author Patterson, D. C.
Title of paper Shoreward sand transport outside the surfzone, Northern Gold Coast, Australia
Conference name 33rd International Conference on Coastal Engineering 2012, ICCE 2012
Conference location Santander, Cantabria, Spain
Conference dates 1-6 July 2012
Proceedings title Proceedings of the 33rd International Conference on Coastal Engineering 2012, ICCE 2012
Journal name Proceedings of the Coastal Engineering Conference
Place of Publication Reston, VA United States
Publisher American Society of Civil Engineers
Publication Year 2012
Year available 2012
Sub-type Fully published paper
DOI 10.9753/icce.v33.sediment.26
Open Access Status File (Publisher version)
ISBN 9780989661119
ISSN 0161-3782
2156-1028
Editor Patrick Lynett
Jane McKee Smith
Total pages 15
Collection year 2013
Language eng
Formatted Abstract/Summary
To date, no suitable theoretical basis has been derived to predict with reliable accuracy the shoreward sand transport under waves in the deeper water outside the surf zone. This is important for understanding the rate of recovery of beaches after major storm erosion and, in some circumstances, to quantify net shoreward supply of sand to the shoreline from the active lower shore-face below the depth of storm erosion bar development. Even a relatively low rate of long term shoreward net supply may contribute to shoreline stability where it offsets a gradient in the longshore sand transport that would otherwise lead to recession. This paper outlines the results of analysis of a 41 year dataset of beach and nearshore profile surveys to quantify annual average rates of shoreward net sand transport in 6-20m water in an area where the profiles are not in equilibrium due to the existence of a residual river mouth ebb delta bar lobe. Additionally, an empirical adaptation of the sheet flow relationship of Ribberink and Al-Salem (1990) to provide for the effects of ripples has been derived from large wave flume data and correlates well with the measured Gold Coast transport rates. These have been applied to a new coastline modelling system developed as part of research into the long term evolution of Australia’s central east coast region in response to sea level change and longshore sand transport processes, which combines the one-line concept of shoreline profile translation within the zone of littoral sand transport with cross-shore profile evolution across the deeper shore-face profile below that zone. It demonstrates the importance of providing for both the shoreward supply from the continental shelf and the varying profile response time-scale across the shore-face in predicting shoreline evolution.
Subjects 2205 Civil and Structural Engineering
2212 Ocean Engineering
1910 Oceanography
Keyword Cross shore sand transport
Equilibrium beach profile
Profile evolution
Profile response time-scale
Q-Index Code E1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Conference Paper
Collections: School of Civil Engineering Publications
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Created: Fri, 29 Nov 2013, 06:09:39 EST by System User on behalf of School of Civil Engineering