Sources

contributors to the materials found on a beach, such as coral skeletons, eroded rocks (C1)

Sinks

places where beach sediments are stored/taken away from a beach, such as offshore (C1)

Shoreline armoring

structures such as seawalls, revetments, and groins designed to slow coastal erosion (C1)

Sediment sink

a place/process such as a crosscurrent that removes sand from a beach system (C1)

Seawall

a vertical or near-vertical type of shoreline armoring characterized by a smooth surface (C1)