Case Study 2 –Carlisle Flooding, 2005
On 8th January 2005 River Eden flooded Carlisle. Flood Return Interval is 200 years. Carlisle is a city in North Cumbria. At risk due to:
- River Eden which runs through Carlisle has a very large catchment area so catches a large amount of rainwater leading to higher river discharge
- Watersheds have steep sides.
- Streams drain quickly to river, low lag time
Main Causes (Physical):
- Heavy rainfall on 6th January for 36 hours. 200mm recorded, same as 4 average months.
- Ground already saturated, surface runoff increased.
- Peak discharge of over 1520 cumecs compared to average of
- Urbanisation – Lots of tarmac, not much vegetation
- Drains and sewage systems overflowed
- 3 deaths
- 3000 people made homeless,
- 4 schools severely flooded
- Increase in stress related illness
- Increased river bank erosion
- River polluted with sewage and rubbish
- A year to repair damage at a cost of £100,000 million
- 350 businesses shut
- United Biscuits largest employer was flooded. 33 employees lost their jobs
- 70,000 addresses lost power
- 80 buses destroyed and many roads and bridges also destroyed.