BOSCASTLE FLOOD CASE STUDY BBC

Increase in buildings within the drainage basin meant that there more impermeable surfaces which directed water back to the river faster. A trough is an area of localised rain and thunderstorms. Very heavy rain fell in storms close to the village, causing two rivers to burst their banks. Human Impacts There was a huge financial cost to the floods. The bridge acted like a dam and eventually smashed through causing a surge of water up to 5m high. These became saturated so water became surface run-off very quickly. These factors led to a flash flood which caused over one thousand homes, cars and businesses to be swept away and damaged.

The rainfall rate key shows how the colours in the image relate to the rate the rainfall is falling. A large quantity of water arrived within a short space of time causing the rivers to overflow. These became saturated so water became surface run-off very quickly. The flooding also had several other key impacts on Boscastle and its inhabitants. Boscastle is at the confluence of three rivers – Valency, Jordan, and Paradise. The pictures show cloud forming over Boscastle at about 1 p.

Tree management – dead trees were removed to prevent them being swept away, causing blockages under bridges. Animation of rainfall radar. Boscastle flood Emergency services on the scene of the flooded village of Boscastle.

boscastle flood case study bbc

Boscastle, Cornwall In Augustthe village of Boscastle saw a month’s worth of rain fall in two hours. 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. Cars, walls and even bridges were washed away. There were very few trees to absorb water and slow the amount of water going into the river.

  THESIS KULEUVEN OPZOEKEN

Increase in buildings within the drainage basin meant that there more impermeable surfaces which directed water back to the river faster. Steep valley sides – water flowed into the river channel very quickly. For example, the red areas indicate that rain is falling at between eight and 16 mm per hour.

It remains over the area for about six hours.

boscastle flood case study bbc

Map of the area affected What happened to cause this event? A depression brought a thunderstorm on 16 August with over mm of rain in 24 hours. Destruction of houses, businesses and gardens Floodwater gushed into houses, shops and pubs. Widening and deepening the river channel – this allowed the river to carry more water. It flooded in Augustwashing cars and buildings into the sea and putting peoples’ lives in danger.

Rainfall rates of at least 32 mm per hour are being measured. The weight of water eroded river banks, damaged gardens and pavements.

The drainage basin of Boscastle is steep and impermeable rock. The rainfall rate key shows how the colours in the image relate to the rate the rainfall is falling.

Very heavy rain flpod in storms close to the village, causing two rivers to burst their banks. The flooding also had several other key impacts on Boscastle and its inhabitants. About two billion litres of water then rushed down the valley straight into Boscastle.

Case Study – Boscastle Floods

Responses to the flooding John Prescott, the Deputy Prime Minister, and Prince Charles visited members of the emergency services and the local GP surgery, which acted as the emergency centre, in the days following the disaster. Huge amounts of water from this sudden downpour flowed into two rivers, the Valency and Jordan which flows into the Valency just above Boscastle.

  AL BASHAIR PRIVATE SCHOOL HOMEWORK

Prince Charles, who is the Duke of Cornwall, made a large donation to a fund to help rebuild parts of Boscastle. Boscastle is also located on a confluence of three rivers. Boscastle is at the confluence of three rivers – Valency, Jordan, and Paradise. Many trees had been cut down for farming. The bridge acted like a studj and eventually smashed through causing a surge of water up to 5m high.

Human Impacts There was a huge financial cost to the floods. There is more about rainfall radar in the weather section of the Met Office website.

River flooding and management issues – Revision 3 – GCSE Geography – BBC Bitesize

A line of convergence formed near the coast line, where air moving in boscaztle opposite directions collides, this helped to increase the rate of ascent and produced very heavy rain. A line of very heavy rain starts at about 1 p. Weather chart Fig 1. Radar imagery Fig 2. The rock in the local area is slate which does not allow percolation.