10.14 Coastal realignment

Question 1

What is managed retreat

Answer 1

Managed retreat is the controlled flooding of low-lying coastal areas. If an area is at high risk of erosion, managed retreat could be an option. It usually occurs where the land is of low value, for example farm land.

Question 2

Managed retreat advantages

Answer 2

• 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.

Question 3

Managed retreat disadvantages

Answer 3

• 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.