BIOLOGY 287 : Lecture 21 - Sea Level Rise & Surge .docx
11 Dec 2014
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: incoming wave energy reflects off the wall; reflected waves crash with incoming waves causing bigger waves and greater turbulence; eventually, walls will be undermined and fall over; seawalls destroy beaches over the long term: in some cases, relocation may be a viable choice if the priority is to save the, purpose, result beach rather than the structures, coastal erosion and river discharge and maintain beaches, dunes, and barrier islands. , driven by incoming swell, distribute the sediment along the shore: longshore currents (longshore drift/transport, deeper than about 30 ft. (10m) the sand is lost from the beach system, seasonal changes in wave energy winter and deposition of sand on the beach during the summer along the coast result in net erosion of the beach during the, produces minimal changes in the year to year beach profile, mobility of sand.
