- The sand builds up on one side of the Groynes. The beach becomes longer of the higher side as well.
- Groynes can be concrete/rock/wood
- Cost £2,000 per metre (on average)
- Negative impacts further down the coast.
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- Usually 3-5m high, concrete structure which absorbs energy of the waves.
- Cost £2,000 per metre.
- Provide a promonade area.
- Permenant strcuture that lasts for years.
- Can look ugly.
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- Deposition of sand- beach gets larger.
- Breakwaters are a barrier that have been created slightly out to sea.
- There are many different tpes of breakwaters;natureal rock and concrete.
- Cost £ 2,500 per metre.
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- Rocks boulders held in a wire mesh cages and used to protect the vunerable areas from destructive waves.
- Cost £100 per metre.
- Mud sediment is being deposited and grass grown over the boxes.
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Rock Amour or Rip Rap
- Giant granite boulders, brought from Norway, at the foor of cliffs to absorb wave energy.
- Cost £300 per metre.
- This is generally used in areas prone to erosion to absorb wave energy and hold the beach material
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