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1 April 2013 On the Predictability of Mid-term Cross-shore Profile Evolution
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Abstract

Fernàndez-Mora, À., Calvete, D., Falqués, A., Ribas, F., and Idier, D., 2013. On the Predictability of Mid-term Cross-shore Profile Evolution

The aim of the present study is to analyse the mid-term beach profile evolution, considering the hypothesis that the alongshore processes can be neglected for the prediction of the mean profile evolution. To this end, a process-based model for the evolution of the cross-shore profile has been used. The model describes feedbacks between waves, rollers, depth-averaged currents and bed evolution, accounting for the effects of wave skewness and asymmetry on sediment transport. Offshore waves and tides conditions and bathymetric profiles measured at the FRF-USACE Duck are used to simulate a mid-term (72 days) onshore sandbar migration event. The model results agree with observed onshore movement and growth of the sandbar due to the inclusion of the intra-wave oscillatory flow with the skewness and asymmetry effects. The best predictions belongs to the averaging of the modelled evolution of individual cross-shore profiles that is better than the evolution of the mean cross-shore profile since. it takes into account the alongshore variability of the cross-shore profiles. These two methods result on better predictions than the individual profiles during the entire event.

Àngels Fernàndez-Mora, Daniel Calvete, Albert Falqués, Francesca Ribas, and Deborah Idier "On the Predictability of Mid-term Cross-shore Profile Evolution," Journal of Coastal Research 65(sp1), (1 April 2013). https://doi.org/10.2112/SI65-081.1
Received: 7 December 2012; Accepted: 6 March 2013; Published: 1 April 2013
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