YEAH Flashcards
when was the Cumbrian floods
19th November 2009
where was the Cumbrian floods
On the North West of England , in COKERMOUTH , near the West coast and is on the river Cocker and River Derwen.
How is urbanisation a cause of the cumbrian floods , what type of inflicted cause is it .
It is a human inflicted cause , In Cockermouth , there is an increase in the amount of impermeable surfaces which increases run off which then , increases the discharge into rivers .
How is blocked sewers a cause of the cumbrian floods , what type of inflicted cause is it .
It is a human inflicted cause , blocked sewers causes water to rise , causing flooding incidents e.g Elliot Park in Keswich .
How is dredging a cause of the cumbrian floods , what type of inflicted cause is it .
The rivers had not be dredged for many years , decreasing the rivers capacity which then increases the chance of floods .
How is rain a cause of the cumbrian floods , what type of inflicted change is it .
It is a physical cause There was a very high volume of rain - 31.4cm in 24 hours
What caused the heavy rain in Cockermouth ?
- Warm conveyor - warm air from the mid-Atlantic common in the UK during Autumn and Winter-warm air holds more moisture .
- Orographic rainfall - air forced to rise over highland Cumbrian Mountains .
What are some additional caused to Cumbrian Floods
-Cumbria already received a months worth of rain already before the extreme event on the 17-20 November . So THE GROUND WAS ALREADY SATURATED , so runoff was straight into the rivers .
Steep slopes - rapid run offs
What were the social impacts of the Cumbrian Floods
- Police officer Bill Barker was killed when a bridge in Workington collapsed .
- 1,500 homes were flooded
- Many injured
- river contaminated with sewage brought health risks .
what were the economic impacts of the Cumbrian Flood
The regional economy was instantly hit .
- Many businesses closed and did not reopen until long afterwards .
- Debris transported by the rivver destroyed six important regional bridges .
what were the environmental impacts of the Cumbrian flood
-At its peak flow , water erosion by the Riverr Derwent triggered landslides along its banks . The river tore loose nd carried away hundreds of trees , damaging local ecosytems and habitats
What were the Uk Governments responses to the flood
- Provided £1 million to help with clean up and repairs . In ten days .
- Agreed to pay for road and bridge repairs in Cumbria .
- Network rail opened temppoary railway station in Workington .
How did Cockeremouth’s management of future floods at Cockermouth :
£4.4 million management scheme .
- New flood defence walls will halt the spread of the river .
- Funding from Goverment and local contributors .
- River dredged more regularly to deepen the channel .
- New embankments - raise the channel height to reduce the likelihood of extrafloods .
how does a tropical storm form
- air is heated above the surface of warm tropical oceans . The wrm air rises rapidly under low pressure conditions .
- The rising air draws up more air and large volumes of moisture from the ocean , causing strong winds.
- The Coriolis effect causes the air to spin upwards around a calm central eye of the storm .
- As the ir rises , it cools and condenses to from lalrge , towering cumulonimnus clouds , which generate torrential rainfll . The heat given off when the air cools powers the tropical storm .
- Cold air sinks in the eye , thereofre there is no cloud , so it is drier and much calmer .
- Te tropical storm travels across the ocean in the prevailing wind .
- When the tropical storm meets land it is no longer fuelled by the source of moisture and heat from the ocean so it looses it power and weakens .
