Hard and soft engineering Coast

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Name the hard engineering strategies
Sea Wall, Rock Armour, and Groynes
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What are the advantages and disadvantages of using Sea Walls?
Prevents erosion and also acts as a flood barrier. However, creates a strong backwash that erodes under the wall. They are very expensive to build and maintain
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What are the advantages and disadvantages of using rock armour?
The boulders absorb the wave's energy so reduce erosion and flooding. They are cheap. However, they can be moved around by the waves so need to be replaced
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What are the advantages and disadvantages of using groynes?
Trap material transported by LSD. They create wider beaches that slow waves. Cheap. However, they starve beaches further down coast of sand, making them narrower so more prone to flooding and erosion
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Name the soft engineering strategies
Beach nourishment, dune regeneration, marsh creation, managed retreat
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What are the advantages and disadvantages of beach nourishment?
Creates wider beaches that slow waves, however it's expensive, needs to be repeated, and can kill organisms
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What are the advantages and disadvantages of dune regeneration?
Absorbs wave energy, and stabilisation is cheap. However, protection is limited to small area. Nourishment is very expensive
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What are the advantages and disadvantages of marsh creation?
Stabilises mudflats and helps reduce wave speed. Creates new habitats. However, not useful where erosion rate already high, and fairly expensive
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What are the advantages and disadvantages of managed retreat?
Over time land will become marsh, creating new habitats. Flooding and erosion reduced, and fairly cheap. However, people may disagree over what land is allowed to flood, people may loose livelihood
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Other cards in this set

Card 2

Front

What are the advantages and disadvantages of using Sea Walls?

Back

Prevents erosion and also acts as a flood barrier. However, creates a strong backwash that erodes under the wall. They are very expensive to build and maintain

Card 3

Front

What are the advantages and disadvantages of using rock armour?

Back

Preview of the front of card 3

Card 4

Front

What are the advantages and disadvantages of using groynes?

Back

Preview of the front of card 4

Card 5

Front

Name the soft engineering strategies

Back

Preview of the front of card 5
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