South Downs sediment cell

Occupies sub-cell 4D along the Sussex coast of England

Between the cliff headlands of Selsey Bill and Beachy Head

Split in half to the east and west of Brighton Marina, which forms two further sub-cells

Heavily defences beaches

Pebble and fossil beaches with sand exposed at low tide

Drift/transport/flood direction west to east

5000m3 gravel and sand lost round beach head

8km out of 22km of cliff are protected

Ouse and Cuckmere rivers provide 5000m3 of sediment to the east

Adur & Arun rivers provide 2800m3of fluvial sediments to the west

Wave cut platform erosion provides 400m3 of sediment

Dredging causes 32000m3 of loss in Shorham Harbour, and 5000m3 of loss in Brighton Marina