Map showing location of major UK floods. The Boscastle Flood The Boscastle storm of 16 August Using the Teachit Geography template, this sorting exercise provides a framework for investigating cause of, effect of and response to the Boscastle flood. 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. 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 Environment Agency is responsible for warning people about floods and reducing the likelihood of future floods. Boscastle to benefit for years to come from new flood defence scheme and regeneration projects [Online] Available at: Destruction of houses, businesses and gardens Floodwater gushed into houses, shops and pubs. Radar imagery Fig 2. Cars, walls and even bridges were washed away.
Map showing location of major UK floods.
The Boscastle flood of – A case study of cause, effect and response
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 stury erosion of embankments. Weather, 60 8pp. Agricultural land flooded and contaminated by polluted water.
Rainfall rates of at least 32 mm per hour are being measured. Dramatic Cawe in Boscastle [image online] Available at: Don’t show this message again. Rainfall Radar Animation of rainfall radar. In addition, 84 wrecked cars were in the harbour, see Figure 8, with another 32 out at sea.
Boscastle Floods, 2004
These factors led to a flash flood which caused over one thousand homes, cars and businesses to be swept away and damaged. Low bridges removed River widened through Boscastle New flood defence wall built in village centre River bed lowered by an average of 0.
Consequently, the soils were already saturated so water could not infiltrate into the ground, causing overland flow on the 16th. The line labelled known as a trough line caused very heavy rain and thunderstorms. 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. 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. The Boscastle Floods [image online] Available at: This combined with the Valency valley being narrow led to a very high discharge descending into the valley bottom of Boscastle in a short space ecfects time Bull, Destruction of houses, businesses and gardens Floodwater gushed into houses, shops and pubs.
About two billion litres of water then rushed down the valley straight into Boscastle. The rainfall rate key shows how the colours in the image relate to the rate the rainfall is falling.
The church was filled with six feet of mud and water. Cars were swept out to sea, buildings were badly damaged and people had to act quickly to survive.
Case Study – Boscastle Floods
Residents had little time to react. Floods devastate village On 16 Augusta devastating flood swept through the small Cornish village of Boscastle.
Flooding On the day of the flood, about 75mm of rain fell floodd two hours — the same amount that normally falls in the whole of August.
Both overflowed, and this caused a sudden rush of water to speed down the Valency — which runs through the middle of Boscastle. Village built at the confluence of the River Jordan and the River Valency.
River management – AQA – Revision 5 – GCSE Geography – BBC Bitesize
Flooding in Cornwall [images online] Available at: Weather60 8pp. The thickest cloud is shown by the brightest white areas on the picture. You need to be able to compare and explain the different effects of and responses to flooding.
Boscastle to benefit for years to come from new flood defence scheme and regeneration projects [Online] Available at: The flooding also had several etudy key impacts on Boscastle and its inhabitants. This unstable environment made prime characteristics for storm development, allowing cloud water to be retained, leading to intense rainfall, with over 1, million litres of rain being recorded in just two hours Golding, Clark and May, ; North Cornwall District Council, Deforestation in Himalayas Ganges diverted for irrigation increasing silt deposition Rapid unplanned urbanisation in Dhaka.