DISADVANTAGES-Expensive to build and maintain. Ugly and restricts access to the beach.
1 of 8
Groynes
HARD ENGINEERING
ADVANTAGES-Prevent long shore drift.
DISADVANTAGES- They can look unsightly and oftendo not last long because wood rots. Places up shore may lose their beaches and protection, thus transferring the problem elsewhere.
2 of 8
Rip Rap
HARD ENGINEERING
ADVANTAGES- Absorb wave energy and protect weak cliffs behind.
DISADVANTAGES- Expensive and they still let some waveenergy through . They can also restrict access.
3 of 8
Reventments
HARD ENGINEERING
ADVANTAGES-These absorb wave energy.
DISADVANTAGES- They require regular maintance and are expensive.
4 of 8
Offshore reefs
HARD ENGINEERING.
ADVANTAGES- Waves break on the barrier before reaching the coast and are reduced significantly.
DISADVANTAGES- The may interfere with boats and are very expensive.
5 of 8
Beach replenishment
HARD ENGINEERING.
ADVANTAGES- Waves break on the barrier before reaching the coast and are reduced significantly.
DISADVANTAGES- The may interfere with boats and are very expensive.
6 of 8
Managed retreat
SOFT ENGINEERING.
ADVANTAGES- No threat to human safety and natural processes are allowed to continue.
DISADVANTAGES- Compensation has to be paid for disruption to homes and businesses.
7 of 8
Cliff regrading
SOFT ENGINEERING.
ADVANTAGES- The angle of the cliff is reduced so mass movement is unlikely, and this is often considered relatively cheap.
DISADVANTAGES- Other methods have to be used to stop the cliff being steepened again.
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