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Coastal Defences
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How do mangroves offer coastal protection
Their roots stabilise sediment to prevent erosion.
A natural sea defence
Mangroves
The name for planting marram grass to stabilise dunes
Dune regeneration
The name for pumping sand onto beaches to create wider beaches to slow waves
Beach Nourishment
What defences allow sediment to accumulate.
Groynes
What angle are groynes places at?
Right angle
The movement of sediment along the coast is....
Longshore Drift
Another name for rock armour
Rip rap
Large boulders that absorb wave energy
Rock Armour/Rip Rap
Wired cages full of rocks at cliff bases to absorb wave energy
Gabions
Made of concrete & reflects waves back to sea.
Sea wall
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