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Norfolk Coastline Case Study (DONE FOR EVER!!!) - Coggle Diagram
Norfolk Coastline Case Study
(DONE FOR EVER!!!)
Reasons for management
Rock type - the cliffs are made from less resistant boulder clay - slumps when it is wet
the beaches are naturally narrow - which gives less protection to the coast as they don't reduce the powers of the wave
there are man-made structures - groynes have been installed to stop longshore drift and the build up the beaches in certain places -
Powerful waves travel a long way over the north sea - which means that they will increase in energy
Management stratgies
the beach is protected by wooden groynes - wooden revetments and rock armour
coastal management at the beach has tried to make the beach wider - sea wall is also there to help make the beach wider
cost benefit
Social reasons
many people that live along the coastline believe that the coastline must be maintained and looked after
some people don't like where the sea defenses have been put because their community is not protected
Economic reasons
some sea defenses negatively impact tourism and reduce the amount of money coming into the area
some defenses are very expensive so if there is a low number of people living there and then the government or the council may choose not to support the community
Environmental Reasons
Managing coastlines are important to help protect and preserve the wildlife and natural habitats from destruction
Engineering
Hard Engineering
Sea wall
to help stop erosion of the sea - it is a narrow stretch of land so stopping erosion is important
Groynes
the beach is narrow so therefore helping to stop the erosion so that there is more beach available is important
Rip Rap barriers
large rocks places in front of cliff to help slow the wave energy - therefore helps to stop the rate of erosion
Gabions
wire cages filled with stone, help to reduce erosion - absorbs wave energy - sometimes get covered in sand so they trap sediment on low lying coasts
Soft Engineering
beach nourishment
Sand is pumped onto an existing beach to help build it up.
Reprofiling
sediment is redistributed from lower part of beach to the upper part of the beach.