The Probert Encyclopaedia of General Information

SWASH

Swash is the movement of a thin layer of turbulent, foaming water up a beach following the breaking of a wave. As this water rushes along it carries sand and shell fragments with it, depositing them when it runs out of energy. Flat waves, which have a very strong swash, often move a lot of material on to a beach in this way. Some of the swash soaks into the beach, while the rest returns to the breaker zone as backwash; the edge of a zone of swash action is often marked by a line of seaweed and driftwood.
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