A numerical study on beach cross-shore profiles response to storms and sea level rise

Nghi H. Trana,b,*, A. Vila-Concejoa, T. Sallesa, R. J McCarolla

a: Geocoastal Research Group, School of Geosciences, The University of Sydney, NSW, Australia

b: Faculty of Civil Engineering, Water Resources University, Hanoi, Vietnam

*Corresponding author:

E-mail address: huu.tran@sydney.edu.au

Abstract

This study focuses on how the iconic Bondi beach in Sydney may change under the impact of potential storms and forecasted sea level rise.  We use the open-source model, XBeach (Roelvink et al., 2009), to investigate these impacts focusing on beach erosion and cross-shore profile changes. At first, the model is setup to simulate beach response to a past storm event that impacted the beach 12-August-2012. We use survey measurements obtained before and after the storm to calibrate the model. Finally, we use the calibrated model to predict beach response (erosion volumes and cross-shore profile changes) to different potential scenarios of storm power and predicted sea level rise in 2050 and 2100.

Key words: XBeach; beach and dune erosion; numerical model; sea level rise; cross-shore sediment transport

Biography

-Bachelor of Engineering, 2006, National University of Civil Engineering, Vietnam (Ports and Waterways Construction);

-Master of Engineering, 2010, The University of Tokyo (Coastal Engineering);

-PhD student, 2016-now, The University of Sydney;

-Lecturer at Water Resources University, Vietnam

About the Association

The Australian Coastal Society (ACS) was initiated at the Coast to Coast Conference in Tasmania in 2004. The idea was floated as a means for those interested in coastal matters to communicate between conferences and where possible take resolutions of the conference to appropriate levels of government.

The idea was discussed further at the Coast to Coast Conference in Melbourne in 2006 and it was agreed that Bruce Thom develop a constitution of a company limited by guarantee that would operate on a national basis.

This plan was accomplished and in 2008 at the Coast to Coast Conference in Darwin the constitution was ratified and an Executive appointed. The company received charitable status in 2011.

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