South Downs sediment cell

Where does Sub-cell 4D occupy?

Occupies along the Sussex coast of England between Selsey Bill and Beachy Head.

What is the purpose of Brighton Marina?

Divides the coastal area into two further sub-cells to the east and west.

What are heavily defended beaches?

Beaches that have been fortified against erosion.

What is the beach composition?

Pebble and fossil beaches with sand exposed at low tide.

What is the drift direction?

The direction of sediment transport, which is west to east.

How much sediment is lost at Beach Head?

5000m³ of gravel and sand lost round beach head.

How much cliff is protected?

Out of 22km of cliff, only 8km are protected.

What is the sediment from Ouse and Cuckmere rivers?

Provides 5000m³ of sediment to the east.

What is the sediment from Adur & Arun rivers?

Provides 2800m³ of fluvial sediments to the west.

How much sediment is from wave cut platform erosion?

Produces 400m³ of sediment.

Dredging Impact in Shorham Harbour

Causes 32000m³ of sediment loss.

Dredging Impact in Brighton Marina

Causes 5000m³ of sediment loss.