Coastal Protection Flashcards
Sea wall
Concrete wall placed in front of the cliff
Deflects the wave energy back into the next wave
Sea wall advantages
Strong last a long time
Efficient
Sea wall disadvantages
Expensive
Not attractive
Harder to get to the beach
Gabon’s
Strong wire baskets filled with rocks
— rocks replaced in cages
Gaps between the rocks absorb wave energy
Reduce the power of waves
Prevents the beach being washed away
Gabon’s advantages
Cheap
Attractive/ugly
Long term
Can trap sand
Gabions disadvantages
Unattractive
Not as effective as the sea wall
Shorter life span(rust)
Groynes
Wooden extension across the beach
Trap sand
Will prevent the beach being washed away
Groynes advantages
Cheaper than sea
Keeps a beach for tourist
Groynes disadvantage
Ugly
Beaches further along the coast may lose their supply of sand as LSD is restricted
Beach nourishment
Pull sands to existing beaches
Large beach area
Sands are brought from else where
Putting sand on the beach
Beach nourishment advantages
Keeps it nice for tourist
Beach nourishment disadvantages
Expensive as it has to keep being replaced
Rip rap
A barrier a large rocks protecting the coast
Absorbs wave energy in gaps between boulders
Rip rap advantages
Relatively cheap
Efficient
Rip rap
Disadvantages
Expensive if rocks is imported
Not attractive
Hard to get to the beach
