Boscastle’s main industry is tourism. A trough is an area of localised rain and thunderstorms. Keep me logged in. Building along river Construction of small bridges across river trapped material behind them creating small dams River narrowed through Boscastle reducing capacity Deforestation in valleys. For this section of the unit you need two case studies, one from a richer area of the world – Boscastle, UK and one from a poorer part of the world – Dhaka, Bangladesh. Web page reproduced with the kind permission of the Met Office. Weather chart Fig 1.
It is likely that home insurance will be much costlier in Boscastle from now on. It remains over the area for about six hours. The drainage basin of Boscastle is steep and impermeable rock. There is more about surface pressure charts in the weather section of the Met Office website. Peter Report Mon 10th June, About two billion litres of water then rushed down the valley straight into Boscastle. Destruction of houses, businesses and gardens Floodwater gushed into houses, shops and pubs.
Peter Report Mon 10th June, Each shelter has space for over families and includes a toilet Radios to issue warnings Embankments to hold back rising water Sluice gates able to close channel when water rises Slope protection to reduce erosion of embankments.
Destroyed homes Stress and anxiety for local people Cars belonging to more than 1, people 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.
The damage not only affected the residents, but also insurance companies. Dhaka Integrated Flood Protection Project Cluster villages raised by 2m and raised homesteads individual homes raised by 2m on earth banks Flood shelter: The danger of hypothermia, shock or even being swept away was great. Prince Charles, who is the Duke of Cornwall, made a large donation to a fund to help rebuild parts of Boscastle.
Download the free PDF resource. Rainfall rates of at least 32 mm per hour are being measured.
Weather chart Fig 1. Low bridges removed River widened through Boscastle New flood defence wall built in village centre River bed lowered by an average of 0.
The combination of high localised temperatures and the great quantity effrcts unabsorbed surface water plus moist winds off the sea caused a great deal of moist, warm air to travel upwards quickly. A line of very heavy rain starts at effectx 1 p. Report Thu 30th May, Cars, walls and even bridges were washed away.
The Boscastle flood of – A case study of cause, effect and response
Small catchment area about 23km2 Impermeable upland area Bodmin Moor Steep-sided valleys Extremely wet summer, by August ground was saturated. Water on land – case studies. Hard impermeable surfaces increased bsurface run-off. The pictures show cloud forming over Boscastle at about 1 p. This link f,ood in a new window.
The effects of and responses to floods vary between areas of contrasting levels of wealth.
For this section of the unit you need two case studies, one from a richer area of the world – Boscastle, UK and one from a poorer part of the world – Dhaka, Bangladesh. Widening and deepening the river channel – this allowed the river to carry more water. The rain started, and within a few hours a massive 5 inches of rain had fallen in Boscastle alone. Tash Report Thu 30th May, Boscastle is also located on a confluence of three rivers.
Slide show of photographs of the Boscastle flood. The rainfall rate key shows how the colours in the image relate to the rate the rainfall is falling.
There is more about surface pressure charts in the weather section of the Met Office website. 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.
The line labelled known as a trough line caused very heavy rain and thunderstorms.
Over bridges destroyed 15,km road damaged Crops lost leading to food shortages Financial losses for efffects and shops Communications damaged making co-ordinating rescue efforts difficult.
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 weight of water eroded river banks, damaged gardens and pavements. 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.