Giovanni Coco
Nathaniel G. Plant
Karin R. Bryan
Jennifer Brown
Jamie MacMahan
Nadia Senechal
2018
<p><span>Video measurements of runup were collected at low tide along several profiles covering an alongshore distance of 500 m. The morphology displayed a complex shape with a shoreline sandwave in the lower beach face of about 250 m long mirrored in the inner sandbar. Wave conditions were stationary and moderate (offshore height of 2 m and peak period of nearly 13 s) but yet dissipative. Runup energy was dominated by infragravity frequencies. Alongshore variations in runup (by a factor up to 3) observed both in the incident and infragravity bands were much higher than reported previously (e.g., Guedes et al., 2012, </span><a class="linkBehavior" href="https://doi.org/10.1016/j.csr.2012.08.022" data-mce-href="https://doi.org/10.1016/j.csr.2012.08.022">https://doi.org/10.1016/j.csr.2012.08.022</a><span>; Ruggiero et al., 2004, </span><a class="linkBehavior" href="https://doi.org/10.1029/2003JC002160" data-mce-href="https://doi.org/10.1029/2003JC002160">https://doi.org/10.1029/2003JC002160</a><span>) while the alongshore variations in other environmental parameters (e.g., foreshore beach slope) appear to be much lower. Our data suggest that the beach morphology in the inner surf zone plays a crucial role by inducing rapid and significant modification in the incident wave pattern and the alongshore coherence length scales were consistent with the typical alongshore length scale of the morphology.</span></p>
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10.1029/2018JC014109
en
AGU
Field observations of alongshore runup variability under dissipative conditions in presence of a shoreline sandwave
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