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WorksheetsBoscastle Floods - Causes, Effects and Responses
Total questions: 17
Worksheet time: 5mins
How much rain fell during the thunderstorm?
60mm in two hours
6mm in one hour
600mm in three hours
6000mm in four hours
How many people were rescued by helicopter?
Around 10
Around 200
Around 1000
Around 100
How many properties were flooded?
2
68
58
124
How many people were killed?
11
3
0
23
How many of the 31 fire stations were involved in the rescue attempts?
6
29
32
31
How much damage was done?
Around £2 million
Around £6 million
£5.53 million
123 million VND
A flood event of this size would only occur once in how many years?
100
200
500
400
What process would planting trees on the upper slopes increase?
Percolation
Groundwater flow
Condensation
Interception
Boscastle is at the confluence of three rivers, they are:
Valency, Jordan and Paradise
Valency, Paradise and Lebanon
Valency, Jordan and Valency
Paradise, Jordan and Boscastle
The ground below was impermeable due to:
Too much grass on the surface
To many trees intercepting the rainfall
Slates, granites and thin clay soils
Steep slopes
What happened at the bridge during the flood?
It collapsed
People were stuck on the bridge
The fire rescue were repairing the bridge
Cars and trees got stuck under the bridge, causing a blockage, which worsened the flooding
What did they do to the river bed as part of engineering strategy?
Lowered it by around 0.75 metres
Raised the bed by around 1 metre
Smoothed the river bed
Added gravel to the bed
The removal of the lower bridge has a pro and a con, they are:
Pro: It is cheaper to maintain the older bridge
Con: A piece of history is lost
Pro: Rock recovered can be used in construction
Con: The recovered rock may be old and weak
Pro: vegetation cannot get stuck in it should there we another flood
Con: there are fewer escape routes after losing a bridge
Pro: Water can flow faster without the bridge
Con: Fast moving water can cause more deposition
One reason you might widen the river is:
It looks more beautiful
Wide rivers can increase wildlife such as ducks and geese
A wider river will allow more hydraulic action to occur
It increases the capacity of the river to hold a higher discharge
The major benefit of moving the car park upstream and away from the river is:
Cars can park closer to the centre
There is more space for each car
Flooding is more likely downstream and closer to the river
What other two methods of flood prevention have been added to Boscastle
- Helicopter landing site
- Built another fire station
- Raise the car park
- Built a new flood defence wall
- The narrowing of the river channel
- The construction of more houses close to the river
- An improved weather system installed
- A kayak rescue team
My favourite subject is:
I.T. :(
Business :(
History :(
Geography :)
