Soft engineering Flashcards
What is soft engineering
A type of coastal management that does not involve building structures and takes a more sustainable and natural approach to managing the coast
Define beach nourishment
when sand is pumped on to an existing beach to build it up
What are the advantages of beach nourishment
Blends in with the existing beach.
Larger beaches appeal to tourists.
What are the disadvantages of beach norishment
Needs to be constantly replaced.
The sand has to be brought in from elsewhere.
Define beach regrading/reprofiling
The sediment is redistributed from the lower part of the beach to the upper part of the beach.
What are the advantages of beach regrading/reprofiling
Cheap and simple.
Reduces the energy of the waves.
What are the disadvantages of beach regrading/reprofiling
Only works when wave energy is low.
Needs to be repeated continuously.
Define managed retreat
Managed retreat is the allowing of some coastal areas to erode or flood in a controlled way
What are some advantages of managed retreat?
This is a cheap option compared to paying for sea defences.
Creates a salt marsh which can provide habitats for wildlife and a natural defence against erosion and flooding.
Salt marshes are diverse ecosystems supporting many species.
What are some disadvantages of managed retreat?
Land is lost as it is reclaimed by the sea.
Landowners need to be compensated - this can cost between £5,000 - £10,000 per hectare.
