Coastal Management Flashcards
3 main coastal management strategies
hold the line, advance the line and managed retreat
what’s hold the line
it involves building and maintaining coastal defences to prevent the shoreline from eroding or retreating further inland
what’s advance the line
it aims to extend the coastline out to sea, creating new land for development or other purposes.
what’s managed retreat
it involves allowing the coastline to retreat naturally in certain areas while maintaining or even enhancing the value of the remaining coastal land
what are the two main types of defences
soft and hard engineering
hard engineering examples
sea walls, rock armour, groynes and offshore breakwater
soft engineering examples
beach nourishment, dune regeneration, marsh creation and cliff regrading
sea walls
they absorb and reflect wave energy
promotes tourism with promenades
cost effective
but is an expensive eyesore
rock armour
cost effective
protect the coastline long term
doesn’t match local geology - hard rock is imported
can be a hazard if people climb on them
groynes
protects the cliffs and beach
good for tourism as it keeps the sandy beach
cost effective
ugly
increases erosion elsewhere as no LSD to that area
offshore breakwater
reduces wave energy at coastline so less erosion
waves are forced to break offshore
can be a hazard for boats
interferes with LSD
beach nourishment
good for tourism
cost effective
building up the beach with dredging is bad for habitats
expensive to maintain long term
dune regeneration
good for habitats and biodiversity
helps to build and stabilise dunes
cost effective
planting marram grass will take a long time to do and work
marsh creation
creates new habitats
farmers lose their land and have to be compensated
takes a long time to make and implement
cliff regrading
reduces the cliff angle so it won’t collapse
cost effective
reduces the hazard of it falling on people
doesn’t look natural
what’s the case study for it
holderness coast
