Coastal defences
- Created by: G.Oldham
- Created on: 02-08-17 17:27
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- Coastal Defences
- Groynes
- Prevents longshore drift
- Rock armour
- Protects cliffs
- Sea Wall
- Protects a town or city from damage from the waves
- Gabions
- Lowers the strength of incoming waves
- Beach nourishme-nt
- Replaces sand washed away from destructive waves
- Dune regenerat-ion
- Sand dunes are given more sand to make them high again
- Why are they needed?
- Destructive and construct-ive waves
- Construct-ive = strong swash and weak backwash
- Destructive = weak swash and strong backwash
- Coastal erosion, weathering and transport-ation
- Erosion and weathering processes; Mechanical Weatherin-g,
- Transport-ation processes; Traction, Saltation, Suspensio-n, Solution
- Destructive and construct-ive waves
- Groynes
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