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Groynes are wooden fences that are built down the beach.
They stop materials from being removed from the beach.
Groynes usually last for 20-30 years.
Sea walls protect areas near coasts from tides and waves.
They often prevent flooding.
Revetments are structures placed on cliffs or beaches.
Revetments absorb the energy from incoming water.
They calm or slow down waves.
Gabions are often used to protect sand dunes.
A gabion is a cage, cylinder or box filled with rocks and concrete.
They act in a similar way to a sea wall.
Blue Square Thing
Rock armour is material used to protect shorelines, stream beds and other shoreline structures.
Rock armor is built using a different variety of rocks and stops coastal erosion.
Beach replenishment is a process which replaces sources of an eroding beach.
Sand is dumped so the beach remains.
Sand dunes are formed by wind blown sand that is deposited against a bush, driftwood or rock.
The plants that grow hold the sand in place.