Soft Engineering Flashcards
Strategies (4)
Beach nourishment
Dune stabilisation
Marsh creation
Cliff regrading and drainage
Beach nourishment what (3)
Addition of sand to existing beach
Makes it higher and wider
Sediment dredged from nearby seabed
Ada at angels of beach N (3)
Cheap + easy to maintain
Looks natural and blends in
Increases tourist potential = bigger beach
Disadvantages of beach N
Needs constant mainatenance because of erosion and Longshore drift
Cliff regrading and drainage what (2)
Reduces angle of the cliff to help stabilise it
Drainage removes water to prevent landslides and slumping
Adavanatges if cliff R+D (2)
Effective on clay or loose rock we’re other methods don’t work
Drainage is cost effective
Disadvantages of cliff R+D (2)
Causes cliff retreat
Drained cliffs can dry out = collapse
What is dune stabilisation (2+)
Marram grass can be planted to stabilise dunes
Areas can be fenced in to keep people of newly planted dunes
Advantages of dune stabilisation (3)
Mainatains a natural coastal environment
Provides wildlife habitats
Cheap and sustainable
Disadvantages of duneS. (2+)
Time consuming to plant marram grass
People may respond negatively to being kept of certain areas
What’s marsh creation (3)
Form of managed retreat
Allows low lying coastal areas to be flooded by sea
Land then becomes slat marsh
Advantages of salt marsh creation (3)
Cheap
Natural buffer to powerful waves
Creates important wildlife habitat
Disadvantages of slat marsh creation (2+)
Agricultural land is lost
Farmers or landowners need to be compensated
