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coastal management-Ventnor, rip-rap: use of rock and rubble to protect…
coastal management-Ventnor
why is it needed
economic
high energy cost from powerful wind storms
signigiact property damage from landfalls
area is a holiday resort and has residential houses with millions of pounds worth of property
more major landslides could causes serious social and economic effects
physical
no beaches along coast to break waves
cliffs unstable
landlsides regular
increasingly wet weathers have meant more regular landslides
hard engineering techniques
groynes
encourage beach deposition
used along the coastline
cliff stabalisation
removing of water to stop waterlogging
stabilisation using wiring and terracing
sea walls
prevent retreat of cliff
constructed with rip-rap and concrete tetra pods
cliff drainage
drainage systems
fitted to protect from wave attack
how successful
in terms of the two aims set out the scheme was successful
no longer areas where the sea can directly attack the cliff
no major landslides for last 20 years
cliffs still affected by weathering though only minor rockfall
conflicting views despite the success
aims
stabilise the areas where there are risks of landslides
protect cliffs from the effect of storm waves and sub aerial processes
rip-rap: use of rock and rubble to protect coastlines from erosion and waves
tetrapod: dissipate the force of incoming waves as the water flows around them
sub-aerial processes: processes that affect the face and top of cliffs