Coastal Management consolidation

Which is NOT a management strategy for defending the coast?

• Hard engineering

• Soft engineering

• Managed engineering

• Managed retreat

Groynes are an effective technique because they slow down the process of what occurring?

• Transportation

• Longshore drift

• Nearshore drift

• Deposition

How do groynes work to protect the coastline?

• They trap sediment by slowing down longshore drift, thereby building up a wide beach

• They absorb wave energy so that the cliffs behind are protected

• They act as a hard rock barrier at foot of cliff to provide a buffer again the sea

• They allow rapid longshore drift along the coastline

What is the main disadvantage of using groynes?

• They can starve other beaches of sediment

• Look ugly and unnatural

• Expensive

Which two coastal management structures can you see

• Sea wall and gabions

• Groyne and rock armour

• Gabions and groynes

• Sea wall and rock armour

Why are hard engineering approaches less commonly used now? (Choose 2)

• They are cheaper and don't last for long

• They are expensive and involve high maintenance costs

• They can cause accelerated erosion rates further down the coastline and look unnatural

• Most coastal areas do not have valuable land and property to protect

Which one of the following is a soft engineering technique?

• Groynes
• Dune stabilisation
• Rip rap
• Revetments

Beach nourishment is .... (choose 2)

• when and or shingle is moved from the front to back of the beach by bulldozers

• When marram grass is planted to stabilise the beach

• A more sustainable form of protecting the coastline

• when and sand or shingle is dredged offshore and dumped onto beaches

Managed retreat is a deliberate policy of allowing the sea to _________ or erode an area of low value land

• flood

• deposit

• transport

• protect

Is there any cost associated with managed retreat?

• No - no techniques are put in place
• Yes - techniques are put in place
• No - this is a soft engineering method
• Yes - compensation has to be offered