WorksheetsCoastal Engineering
Total questions: 20
Worksheet time: 10mins
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
A recurved sea wall is effective because it...
Is not particularly expensive
Stops erosion of the coastline
Deflects wave energy back out to sea
What are gabions?
A type of sea wall
Barriers at right angles to the beach
Boulders
Steel mesh cages filled with rocks
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 of these is NOT a soft engineering strategy?
Beach nourishment
Beach reprofiling
Sand dune regeneration
Gabions
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
The main advantages of managed retreat is that it is more sustainable, cheaper in the long term and can create new wildlife habitats
True
False
Identify the coastal defense feature.
Sea wall
groyne
breakwater
barrages
Identify the coastal defense feature.
groyne
sea wall
gabion
revetment
Which type of coastal management involves building artificial structures that try to control natural processes?
hard engineering
soft engineering
Which key word? 'This does not involve building artificial structures, but takes a more sustainable and natural approach to managing the coast.'
Hard engineering
Soft engineering
Managed retreat
Regeneration
Some coastlines eroded faster than others due to the fetch. What is the fetch?
The change of seasons.
The rock composition along a coastline.
The distance over which the wave has traveled.
The average wave height of approaching waves.
