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Beach Morphodynamics of an Atlantic Coast Embayment: Runkerry Strand, County Antrim

John Shaw

Abstract


Runkerry Strand is exposed to high energy Atlantic wind and wave processes. Rhythmic topography found on the beach and in the nearshore zone includes beach cusps, rip current channels, longshore rip feeder channels, rip current embayments (giant cusps), transverse and crescentic bars. Changes in beach/nearshore zone morphology are cyclic and although no link with incident wave power was demonstrated, it is suggested that the Australian beach state model is applicable. Sand is moved seawards by rip currents which scour the sea bed. exposing an underlying gravel frame, and returns landwards on migrating crescentic bars which become welded to the upper beach.

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DOI: http://dx.doi.org/10.2014/igj.v18i1.726

URN: http://nbn-resolving.de/urn:irg:ie:0000-igj.v18i1.7267

URN (PDF): http://nbn-resolving.de/urn:irg:ie:0000-igj.v18i1.726.g5923

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