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Sea Defences:
Sea walls: sea walls are curved to break the energy of the
wave and send it back down the beach instead of damaging
and eroding the coastline. Sea
walls last long (20-30 years) but
are very expensive at up to £2000 -
£5000. Sea walls can protect

Page 2

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erosion and destructive waves. Groynes are also costly and
hard to maintain.
Revetment: this breaks up waves but will let water and
material pass too, it is cheaper than other coastal
management resources at £1200 per metre
Riprap, Boulders or Rock armour: Large rocks, materials
forming a miny cliff stop…

Page 3

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erosion as it slows down destructibe waves and take the
energy. Beaches also have no unattractive features like
concrete sea walls or groynes therefore attracting tourists.
Beaches will always get eroded by longshore drift though
meaning maintance to refil the beach will be needed. I think
the most unsustainable option…

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Tourist Boards will lose interest and tourists as they
won't be able to walk on the beach with groynes there
and sea walls.
Envoirmentalists will be worried how sustainable all this
management is and how it is ruining the habitat.

All these things need to be considered along with sustainability…


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