Flashcards
Coastal Defences
Cards in this deck (7)
- 1SEA WALL: Solid concrete wall on the coast, usually built on the cliff.Effective, lasts a long time, strong, resistant.
Expensive, needs special concrete, expensive to repair. - 2GROYNES: Long lines on rocks out from the coast into the sea.Effective, cheaper than a sea wall, don't affect the beach, stop longshore drift.
Ugly. - 3RIP RAP: Rocks are piled up the cliff to absorb the power of the waves.Effective, inexpensive and easy to repair.
Ugly, reduce beach-like qualities. - 4GABIONS: Baskets full of rocks are attached to the cliff face.Inexpensive, effective, rocks can be sourced from anywhere.
Ugly, dangerous, can break. - 5BREAKWATER: Lines of rock along the shore to build sand up against the cliffs.Inexpensive, effective, don't damage the beach.
Look out of place, change shape of coastline. - 6MANAGED RETREAT: Allows the sea to continue inland. Flooded area absorbs further floods.Natural, cheap, farmers paid for the land.
Farmland lost, habitat lost. - 7DUNE FIXING: Fences trap sand and Marram Grass is planted so dunes become a wall.Looks good, cheap, effective, no habitats lost.
Time consuming, people don't like being banned from certain areas.
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- GCSE Geography (Coastal Zone) Flashcards on Coastal Defences, created by megan1403 on 02/06/2013.
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- megan1403 · Jun 2013
- Updated
- Feb 19, 2016
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