2.3 (c) Coastal management Flashcards
What does “Hold the line” involve in coastal management?
Building and maintaining coastal defences so the current position of the shoreline remains the same
What is “Managed realignment” in coastal management?
Allowing the coastline to move naturally, with processes monitored and directed when necessary
How do groynes work to protect the coast?
They trap beach material being moved by longshore drift
What is soft engineering in coastal management?
Methods that work with natural processes rather than against them
What factors influence decisions about which coastal management approach to apply?
Economic value of resources, engineering solutions, cultural and ecological value of land, community pressure, social value of communities
What is an advantage of managed retreat?
It creates new habitats such as salt marshes
What is a disadvantage of offshore barriers?
They can prevent surfing and sailing
What is managed retreat in coastal management?
Existing coastal defences are abandoned, allowing the sea to flood inland until it reaches higher land or a new line of defences
What is rip-rap in coastal defence?
Large boulders piled up to protect a stretch of coast
What are coastal cells used for in coastal management?
To break a long coastline into manageable sections and help identify risks of erosion and flooding
How does cliff regrading work as a coastal defence?
The angle of a cliff is reduced to reduce mass movement
What are gabions in coastal engineering?
Wire cages filled with stone, concrete, sand etc.
What is a disadvantage of sea walls as a coastal defence?
They are very expensive to build and maintain
What is beach replenishment?
Pumping or dumping sand and shingle back onto a beach to replace eroded material
What is hard engineering in coastal management?
Building sea defences, usually from concrete, wood or rock
