Hundreds killed Millions made homeless Contaminated water led to disease. Low bridges removed River widened through Boscastle New flood defence wall built in village centre River bed lowered by an average of 0. Boscastle is at the confluence where tributaries meet of three rivers — Valency, Jordan, and Paradise. Physical Impacts Flooding On the day of the flood, about 75mm of rain fell in two hours — the same amount that normally falls in the whole of August. Flood management case study:
No flood control system. Small catchment area about 23km2 Impermeable upland area Bodmin Moor Steep-sided valleys Extremely wet summer, by August ground was saturated. We are investing in new ways of predicting heavy rainfall events on a small scale to produce better warnings. Floodwater damaged a great deal of properties. Animation of rainfall radar. Keep me logged in. On the 16th August , a devastating flood swept through Boscastle, a small village on the north Cornwall coast.
Small catchment area about 23km2 Impermeable upland area Bodmin Moor Steep-sided valleys Extremely wet summer, by August ground was saturated. Physical Impacts Flooding On the day of the flood, about 75mm of rain fell in two hours — the same amount that normally falls in the whole of August.
For example, the red areas indicate that rain is falling at between eight and 16 mm per hour. A line of convergence formed near the coast line, where air moving in almost opposite directions collides, this helped to increase the rate of ascent and produced very heavy rain.
Boscastle flood – Causes and effects table in GCSE Geography
The ground was already saturated due to above average rainfall during the previous two weeks. Please Support Internet Geography If you’ve found the resources on this site useful please consider making a secure donation via PayPal to support the floodung of the site.
Widening and deepening the river channel – this allowed the river to carry more water. Human Impacts There was a huge financial cost to the floods. Therefore, there is less risk of damage to property and businesses. Sign up to Comment. Web page reproduced with the kind permission of the Met Office.
The Boscastle flood of – A case study of cause, effect and response
On the 16th Augusta devastating flood swept through Boscastle, a small village on the north Cornwall coast. The drainage basin of Boscastle is steep and impermeable rock.
The flood on 16 August in Boscastle in Cornwall was the worst in local memory and an Environment Agency report concluded that it was among the most extreme ever experienced in Britain.
The risk of flooding has been reduced making Boscastle safer. Satellite image The thickest cloud is shown by the brightest white areas on the picture. Floods devastate village On 16 Augusta devastating flood swept through the small Cornish village of Boscastle.
What was the management strategy?
Dhaka Integrated Flood Protection Project Cluster villages raised by 2m and raised homesteads individual homes raised by 2m on earth banks Flood shelter: The combination of high localised temperatures and the great quantity of unabsorbed surface water plus moist winds off the sea caused a great deal of moist, warm air to travel upwards quickly. Related Topics Use the images below to explore related GeoTopics.
The river Valency had never had a major flood, so the residents of Boscastle saw no need to prepare for such an event. Take a look at our new resources in the shop Dismiss.
The effects of and responses to floods vary between areas of contrasting levels of wealth.
Cars, walls and even bridges stydy washed away. Raising the car park and using a permeable surface – this allowed cars to be much higher and so they were less likely to be swept away. Animation of Satellite images Flash Player required. The new bridge is not popular with local people as it is out of character compared to the rest of the building. Extract The flood on 16 August in Boscastle in Cornwall was the worst in local memory and an Environment Agency report concluded that it was among the most extreme ever experienced in Britain.
No flood control system. No-one died mainly due to the rapid response of the emergency services. There is more about surface pressure charts in the weather section of the Met Office website.
Weather system remained stationary over area due to converging winds.
Removing low bridges and replacing them with wider bridges – this meant large amounts of water could flow freely underneath the bridge and the bridge wouldn’t act like stucy dam in the flood, vegetation and debris became blocked, creating the effect of a dam. Since the Boscastle case was re-run with a higher resolution research model which proved able to resolve the line of thunderstorms with much more accuracy and detail.
As the flood happened so quickly local residents had little time to react. Floods dramatically affected earnings.
The pictures show cloud forming over Boscastle at about 1 p.