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Coastal management - Hard engineering
- Build dams and reservoirs
- Build a dam to trap and store water
- release it in a controlled way
- Water is usually stored in a reservoir
behind the dam. This water can be used to
generate HEP or for recreational purposes
- Sediment is often trapped behind the wall of
the dam, leading to erosion downstream
- Settlements and agriculture land may be lost
when the river valley is flooded to form a reservoir
- If rain is downstream of the
reservoir they have no effect
- It controls the amount of discharge,
therefore the amount of flooding
- Building a dam can be very expensive
- In large flooding events they are vulnerable
to breaking and are expensive to build
- Build a dam to trap and store water
- release it in a controlled way
- Sea wall
- Protects cliffs and buildings
- Expensive to build
- Can look unattractive
- Deflects the power of the waves
- Protects cliffs and buildings
- Groynes
- Exposes other area of the coastline
- Can be easily damaged
- They stop sand from being
carried away along the coastline
- Exposes other area of the coastline
- Rock armour
- A barrier of large rocks soaks up the
energy of the waves, reducing erosion
- They are expensive
- A barrier of large rocks soaks up the
energy of the waves, reducing erosion
- Gabions
- Cages full of rocks which
break the power of the waves
- Cages full of rocks which
break the power of the waves
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