Groyne and Shadow - Pawleys Island, SC
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A groyne is a wooden, concrete, or rock structure built to maintain the beach and protect the land behind by trapping sediments and forcing tidal currents further offshore. They are one of the most common forms of coastal defense.
However, as with any man-made change to nature, there are tradeoffs. Many people view them as making the coastline unnatural and ugly. Further more, even though they protect the beach upon which they are built, they may accelerate erosion on beaches downdrift.
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