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Coastal Defences

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