BOSCASTLE FLOOD CASE STUDY BBC

The Environment Agency is responsible for warning people about floods and reducing the likelihood of future floods. The wind is blowing anticlockwise about the low pressure area, so the air is arriving into Boscastle from a south-westerly direction. Rainfall Radar Animation of rainfall radar. Fortunately, nobody died — thanks largely to a huge rescue operation involving helicopters — but there was millions of pounds worth of damage. 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 a dam in the flood, vegetation and debris became blocked, creating the effect of a dam.

Satellite image The thickest cloud is shown by the brightest white areas on the picture. Boscastle is at the confluence of three rivers – Valency, Jordan, and Paradise. This limited interception and water went straight into the river channel. Huge amounts of water from this sudden downpour flowed into two rivers, the Valency and Jordan which flows into the Valency just above Boscastle. The Environment Agency has carried a major project to increase flood defences in Boscastle, with the aim of preventing a similar flood happening again. The weight of water eroded river banks, damaged gardens and pavements. The Environment Agency is responsible for warning people about floods and reducing the likelihood of future floods.

Cars were swept out to sea, buildings were badly damaged shudy people had to act quickly to survive. Very heavy rain fell in storms close to the village, causing two rivers to burst their banks. British Isles case study: Rainfall Radar Animation of rainfall radar. There is more about surface pressure charts in the weather section of the Met Office website.

A line boscsstle 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. About two billion litres of water then rushed down the valley straight into Boscastle. There is more about rainfall radar in the weather section of the Met Office website.

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Case Study – Boscastle Floods

There were very few trees to absorb water and slow the amount of water going into the river. Huge amounts of water from this sudden downpour flowed into two rivers, the Valency and Cqse which flows into the Valency just above Boscastle. Tree management – dead trees were removed to prevent them being swept away, causing blockages under bridges.

Fortunately, nobody died — thanks largely to a huge rescue operation involving helicopters — but there was millions of pounds worth of damage. 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.

Residents had little time to react. Many trees had been cut down for farming. Widening and deepening the river channel – this allowed the river to carry more water. For example, the red areas boscastoe that rain is falling at between eight and 16 mm per hour. It remains over the area for about six hours. Boscastle, Cornwall In Augustthe village of Boscastle saw a month’s worth of rain fall in two hours.

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The flooding also had several other key impacts on Boscastle and its inhabitants. The rock in the local area is slate which does not allow percolation. Human Impacts There was a huge financial cost to the floods.

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boscastle flood case study bbc

The church was filled with six feet of mud and water. The Environment Agency has carried a major project to increase flood defences in Boscastle, with the aim of preventing a similar flood happening again. The wind is blowing anticlockwise about the low pressure area, so the air is arriving into Boscastle from a south-westerly direction. The Environment Agency is responsible for warning people about floods and reducing the likelihood of future floods. Steep valley sides – water flowed into the river channel very quickly.

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. Physical Impacts Responses to the flooding What happened to cause this event?

The rainfall rate key shows how the colours in the image relate to the rate the rainfall is falling. These factors led to a flash flood which caused over one thousand homes, cars and businesses to be swept away and damaged. Destruction of houses, businesses and gardens Floodwater gushed into houses, shops and pubs.

boscastle flood case study bbc

This link opens in a new window. Cars, floood and even bridges were washed away. Increase in buildings within the drainage basin meant that there more impermeable surfaces which directed water back to the river faster.

A large quantity of water arrived within a short space of time causing the rivers to overflow.