What is managed retreat GCSE?
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.
What is the point of managed retreat?
Managed retreat or managed realignment is a coastal management strategy that allows the shoreline to move inland, instead of attempting to hold the line with structural engineering. At the same time, natural coastal habitat is enhanced seaward of a new line of defense.
What is an advantage of managed retreat?
ANSWER: Creates natural coastal habitat that provides protective functions. Initial costs are high but long term savings are likely. Provides a more sustainable long term solution. Returns land that floods regularly to natural habitat and reduces damage to property.
Is managed retreat hard engineering?
Hard engineering – The use of concrete and large artificial structures by civil engineers to defend land against natural erosion processes. Managed retreat – Allowing cliff erosion to occur as nature taking its course: erosion in some areas, deposition in others.
Where is managed retreat used in the UK?
In the UK, the first managed retreat site was an area of 8,000 square metres (86,000 sq ft) at Northey Island in Essex flooded in 1991, followed by larger sites at Tollesbury and Orplands (1995), Freiston Shore (2001) and Abbott’s Hall Farm, at Great Wigborough in the Blackwater Estuary, it is one of the largest …
Is managed retreat hard or soft engineering?
Soft engineering
Soft engineering techniques involve working with nature to manage the coastline. Techniques include cliff stabilisation, dune regeneration and managed retreat.
Is managed retreat soft or hard engineering?
Soft engineering techniques involve working with nature to manage the coastline. Techniques include cliff stabilisation, dune regeneration and managed retreat.
Why is managed retreat not done everywhere?
Managed retreat will not be the appropriate answer everywhere. Some places will build walls. Some will elevate. The reason the US needs managed retreat to be a viable adaptation option is that some places will retreat and some will need support to do so.
What is the managed retreat solution?
What is the “Managed Retreat Solution”? Rethinking land uses and developing less of the coastal zone.
How long does rock armour last?
– Expected life span of 20 – 25 years if made from steel because they will rust. Stainless steel ones last much longer. Rock Armour / Rip Rap: – Large boulders, of 10 tonnes or more, are piled up along the shoreline to form a type of sea wall.
How are Coasts used?
Coastal land is used for human settlement, agriculture, trade, industry and amenity. The coastal sea presents problems related to transport, fishing, dumping, mining, etc., stemming from an intensification and diversification of ocean uses.
How do you deal with saltwater intrusion?
Coping with Saltwater Intrusion Structures must be regulated to have a safe distance from the sea to prevent excessive groundwater extraction from the reservoir that contributes to saltwater intrusion. Artificial recharges pump freshwater to the reservoir to prevent saltwater from intruding through the coasts.