1218191
Barton - on - Sea
- What's happening?
- Impact on
- Entivoment
- pollutes sea, Loss of
habitat, Starving of Hurst
Castel spit -- loss of marsh
- pollutes sea, Loss of
habitat, Starving of Hurst
Castel spit -- loss of marsh
- People
- Loss of buildings, safety
- Loss of buildings, safety
- Entivoment
- 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.
- Large Fetch- strong winds from SW,
Tock type: soft (sand+clay), Lack of
material on base of cliff - starved
from groynes at Bournemouth.
- WHY
- 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
- Coastle erosion
- 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
- Managing Coast at
Bornemouth - starved
beach
- Impact on
- 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
- Fill with brushwood
- stop water
weakening and
making gullie
bigger
- stop water
weakening and
making gullie
bigger
- Fill with brushwood
- Boulders and wood
piles placed at base
of cliff to stop
waves from
attacking the cliffs
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