longshore drift

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Related to Longshore transport: Longshore current, Marine Terrace, Baymouth bar, sea stacks

longshore drift

n
(Physical Geography) the process whereby beach material is gradually shifted laterally as a result of waves meeting the shore at an oblique angle
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Therefore, waves approaching from SW mostly govern the longshore transport here and make it move to the NE.
The longshore sediment transport rate is usually estimated based on empirical equation relating the longshore energy flux in the breaker zone to the longshore transport rate.
LONGSHORE transport (the movement of sand and sediment) is a very difficult area to model accurately as it is influenced by unexpected events like storms or very high tides (as happened during the winter storms of 1995/96 when sand was lost from Redcar beach, although it naturally returned over subsequent months).
We suspect that increased erosion of the till bluffs during high lake levels five years ago (1998-99) provided new sediment sources, and the longshore transport concentrated the heavy minerals near the two beaches that are located at promontories on the shoreline.