Coastal Gravel Systems

Orford, Julian D.; Anthony, Edward J.

doi:10.1016/b978-0-12-818234-5.00072-9

Cited by 2 publications

(1 citation statement)

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“…Sand beach nourishment has been the subject of numerous studies dealing miscellaneously with methods aimed at attaining the optimal beach profile, post-nourishment beach behaviour, and correlations between grain size and beach slope (e.g., Dean, 1991;Browder and Dean, 2000;Capobianco et al, 2002;Castelle et al, 2009;Di Risio et al, 2010;Broekema et al, 2016). Although there has been a rise in interest in gravel or mixed sand/gravel beaches in recent years (Austin and Masselink, 2006;Ivamy and Kench, 2006;Orford and Anthony, 2013;Grottoli et al, 2015;Bergillos et al, 2016), few studies (e.g., Ciavola and Castiglione, 2009) have focused on nourishment planning and outcome prediction, and even fewer (e.g., Horn and Walton, 2007) studies have addressed the efficacy of beach nourishment using bimodal sand and gravel sediments.…”

Section: Beach Nourishment: An Overviewmentioning

confidence: 99%

Assessing the efficacy of nourishment of a Mediterranean beach using bimodal fluvial sediments and a specific placement design

et al. 2020

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Several studies have highlighted the difficulties inherent to the use of bimodal fluvial sediments in beach nourishment and the resulting unpredictable behaviour of the beach profile. In this paper, we monitored the temporal evolution of a nourishment project carried out on a northwestern Mediterranean beach and based on the use of mixed sands and gravels. The main aim of the study was to examine the morpho-sedimentary evolution of the beach from the injection of the nourishment material to the attainment of a targeted equilibrium profile. The monitoring activity was conducted coupling multiple topo-bathymetric surveys and sediment sampling. The data show that the targeted equilibrium profile was attained less than two years after the nourishment and, since that period, the shoreline has shown minimal mobility. Our results show that the positioning of the nourishment material is as important as the correct choice of grain size to attain rapid and successful nourishment of a beach. Further applications of this methodology in other coastal settings and/or with different nourishment sediments (e.g. medium or fine sands) are presently being considered. If confirmed at a broader scale, this nourishment design, employing bimodal fluvial sediments, should significantly contribute to the mitigation of beach erosion.

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