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water cycle and insecurity
4. FLOODING
BOSCASTLE 2004
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chloe edwards
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Cards (15)
Where is Boscastle?
North Cornwall
What type of town is Boscastle?
An old
fishing
port now turned into a
tourist
location
What % does tourism make of Boscastle‘s local economy?
90%
How was Boscastle vulnerable to a flood event?
Located in a V shaped valley at the
confluence
of 2 rivers, the storm was localised and
200mm
of rain fell in
24 hours
How can we see the Boscastle storm was localised?
Rain gauges
3km
east measured
184mm
of rain, whereas rain gauges
14km
south only measured
1.5mm
of rain
How many Boscastle properties were damaged?
58
properties were flooded and
4
washed away entirely
How many cars were lost in Boscastle?
115
cars
What was the total cost of the flood (damage, long term disruption and rescue efforts)
£50 million
In Boscastle, the flood also caused a
petrol
flow into the ocean
What were the 5 management schemes of the Boscastle flood?
Lowering and widening channels
, creating
braided
channels, replacing the bridge,
raising
the car park, and rebuilding the
culvert
under the hotel
Rebuilding Boscastle bridge
The bridge was replaced further
downstream
and raised up, to reduce risk of it being
blocked
again
Widening and Lowering Channels
This increases water
capacity
of the river incase of another flood, reducing chance of banks
bursting
Braided Channels
Channels are being altered to have
wider
bends with
sediment
in the channels to reduce
speed
of water flowing downstream
Raising Boscastle car park
Material used from the
widening
of the river beds is being used to built the car park up
higher,
reducing chance of vehicles being
washed
away
Relief culvert under the hotel
The original culvert under the hotel has been rebuilt to allow
twice
the capacity of water it did before the flood