pollutes sea, Loss of
habitat, Starving of Hurst
Castel spit -- loss of marsh
People
Loss of buildings, safety
Why do cliffs collapse?
Coastle erosion
WHY
Large Fetch- strong winds from SW,
Tock type: soft (sand+clay), Lack of
material on base of cliff - starved
from groynes at Bournemouth.
Water 'pound up' within cliff
due to permeable sands on top
of permeable clay -- increasing
weight on top of cliff, will
eventually lead to rotational slip
Rate of
Erosion:
2m Year
how have people
worsened the cliff
collapse?
Managing Coast at
Bornemouth - starved
beach
Buiding houses
on top of cliff - increases wight
To Resolve the problems
Boulders and wood
piles placed at base
of cliff to stop
waves from
attacking the cliffs
Metal piles, Drain and
Sand filter: all trying to
remove water from
sitting on top of the clay
and making it
heavier--less chance of
rotational slip
Groynes stop
longshore drift
moving beach
material - base of
cliff
GULLIE: V-shaped
dip that water
drains into - will
gradually get
bigger