jetty(redirected from Jettys)
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jetty:see coast protectioncoast protection,
methods used to protect coastal lands from erosion. Beaches can exist only where a delicate dynamic equilibrium exists between the amount of sand supplied to the beach and the inevitable losses caused by wave erosion.
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a hydraulic-engineering structure used to regulate the flow of a watercourse and to protect a seashore or riverbank from erosion. Earth, stone, concrete, fascines, and gabions are used as building materials for jetties. Jetties are built perpendicular or at an angle to the shore. Bottom jetties protect the foundations of shore structures (levees or retaining walls) from erosion.