Managed retreat - advantages and disadvantages
The controlled flooding of low-lying coastal areas. is the controlled flooding of a low-lying coastal area and the creation of a Land saturated with water, such as a marsh or swamp. area, such as a salt marsh. 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 farmland.
Abbotts Hall Farm salt marshes - an example of managed retreat
Advantages
- It 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.
Disadvantages
- Land is lost as it is reclaimed by the sea.
- Landowners need to be compensated - this can cost £5,000 - £10,000 per hectare.
