Case Study – Boscastle Floods

Floods devastate village.

On 16 August 2004, a devastating flood swept through the small Cornish village of Boscastle.

Very heavy rain fell in storms close to the village, causing two rivers to burst their banks. About two billion litres of water then rushed down the valley straight into Boscastle.

Residents had little time to react. Cars were swept out to sea, buildings were badly damaged and people had to act quickly to survive. Fortunately, nobody died – thanks largely to a huge rescue operation involving helicopters — but there was millions of pounds worth of damage.

Physical Impacts

Responses to the flooding, what happened to cause this event.

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. Huge amounts of water from this sudden downpour flowed into two rivers, the Valency and Jordan (which flows into the Valency just above Boscastle). Both overflowed, and this caused a sudden rush of water to speed down the Valency — which runs through the middle of Boscastle.

Destruction of houses, businesses and gardens Floodwater gushed into houses, shops and pubs. Cars, walls and even bridges were washed away. The church was filled with six feet of mud and water. Trees were uprooted and swept into peoples’ gardens. The weight of water eroded river banks, damaged gardens and pavements.

Human Impacts There was a huge financial cost to the floods. This included:

  • the rescue operation – involving helicopters, lifeboats, and the fire service.
  • the loss of 50 cars
  • damage to homes, businesses and land
  • a loss of tourism, a major source of income for the area

The flooding also had several other key impacts on Boscastle and its inhabitants. These included:

  • environmental damage to local wildlife habitats
  • coastal pollution caused as debris and fuel from cars flowed out to sea.
  • long-term disruption to the village, as a major rebuild project had to be carried out.
  • long-term stress and anxiety to people traumatised by the incident.
  • 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.
  • Prince Charles, who is the Duke of Cornwall, made a large donation to a fund to help rebuild parts of Boscastle.
  • The Environment Agency is responsible for warning people about floods and reducing the likelihood of future floods. The Environment Agency has carried a major project to increase flood defences in Boscastle, with the aim of preventing a similar flood happening again.
  • We are investing in new ways of predicting heavy rainfall events on a small scale to produce better warnings.

In Pictures

boscastle flooding

Weather chart

Radar imagery

Fig 2. Rainfall Radar

Fig. 2 shows radar pictures at 12 p.m. (midday)  on 16 August.

The rainfall rate key shows how the colours in the image relate to the rate the rainfall is falling. For example, the red areas indicate that rain is falling at between eight and 16 mm per hour.

A line of very heavy rain starts at about 1 p.m. on the moors close to Boscastle. It remains over the area for about six hours. Rainfall rates of at least 32 mm per hour are being measured.

There is more about  rainfall radar  in the weather section of the Met Office website.

Satellite imagery Fig. 3 shows an animation of satellite pictures from 12 p.m. (midday) to 7 p.m. on 16 August.

Fig. 3: Satellite image

The thickest cloud is shown by the brightest white areas on the picture. The pictures show cloud forming over Boscastle at about 1 p.m. and staying there for much of the afternoon.

Further information on other websites BBC News website covering the Boscastle flooding BBC News article – Boscastle one year on

Boscastle 16 August 2004 the day of the flood , 2006, Galvin, 61, 29

Web page reproduced with the kind permission of  the Met Office

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boscastle flood case study pdf

Flood Management Scheme – Boscastle

A flood management scheme following the 2004 floods.

Why the Boscastle flood scheme required?

On the 16th August 2004, a devastating flood swept through Boscastle, a small village on the north Cornwall coast.

Very heavy rain fell in storms close to the village, with over 60mm of rainfall in two hours. The ground was already saturated due to above average rainfall during the previous two weeks. Combined with this the drainage basin has many steep slopes and there are areas of impermeable slate that led to rapid run-off. Boscastle is at the confluence (where tributaries meet) of three rivers – Valency, Jordan, and Paradise. About two billion litres of water then rushed down the valley straight into Boscastle within a short space of time causing the rivers to overflow. Additionally, the deluge of water coincided with a high tide.

As the flood happened so quickly local residents had little time to react. Cars were swept out to sea and buildings were badly damaged. Thankfully, no one lost their lives, which is largely due to a huge rescue operation involving helicopters. Million of pounds worth of damage was caused by the flood.

What was the management strategy?

In 2008 a flood management scheme for Boscastle was completed. The solution included both soft and hard engineering strategies.

The Environment Agency has made a considerable investment in flood defences in Boscastle to help prevent a similar flood happening in the future. Working with professional partners, more than £10 million of improvements were carried out. This included widening and deepening the Valency River, and installing a flood culvert to improve flow in the Jordan River.

River Valency Flood Management Scheme

River Valency Flood Management Scheme

The Met Office and Environment Agency have formed the first of several working partnerships, the Flood Forecasting Centre. Combining expertise in weather forecasting and hydrology has helped to prepare communities for flooding during times of extreme weather.

At the time of the floods, the operational forecast model had a resolution of 12 km, which was too large to be able to represent such a small scale collection of thunderstorms. Since 2004 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.

What are the social, economic and environmental issues?

Social issues.

The rebuilding projects and construction of flood defences took several years which meant the lives of local people were disrupted for sometime. The risk of flooding has been reduced making Boscastle safer. The defences would not protect against a flood the same size as the one in 2004. The new bridge is not popular with local people as it is out of character compared to the rest of the building.

Economic issues

The risk of flooding has been reduced. Therefore, there is less risk of damage to property and businesses. The flood-defence scheme cost over £4 million. However, the scheme could have been significantly better, though some options were too expensive.

Environmental issues

Biodiversity has improved as have the river habitats. Vegetation in the area is now managed.

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3.13 Case Study - Boscastle Floods (2004)

Flash floods occurred in the valleys of the River Valency and the River Jordan on 16th August 2004.

The village of Boscastle is situated:

in a narrow valley with interlocking spurs which acted like a funnel

in a steep valley which encouraged rapid run-off

on a flat flood plain

in an area where the soil is impermeable clay which does not allow much infiltration

185 mm if rain fell in five hours

The soil was saturated from recent rainfall so no more rain could infiltrate

The collision of winds on a very warm day caused the excessive rainfall (the air mass from the south met the air mass from the south-west and converged on Bodmin which led to towering cumulonimbus clouds. The air was very unstable and the clouds were up to 10 km high).

The natural channel of the river had been walled (for the construction of the B3263 and a pedestrian area) which prevented it from adjusting to a variation in the discharge of the water.

The village had been built on a flat flood plain.

There was no flood control system.

Cars, trees and boulders became stuck under the bridge and created a temporary dam which caused the water to build up behind it.

The sewers and drainage systems were old and small in capacity; they broke and the water that was in the, took an overland route.  

50 cars were swept into the harbour.

The bridge was washed away and roads were submerged under 2.75 m of water, making communication difficult.

The sewerage system burst.

For health and safety reasons Boscastle was declared inaccessible. 

The Museum of Withcraft lost 50 per cent of its artefacts.

Four buildings were demolished and 58 flooded and the High Street was badly damaged.

 The visitors' centre, a clothes shop and two gift shops were badly damaged.

The youth hostel was flooded.

People were in shock and there were concern about hypothermia or being swept away.

There was no power in the village for some time (an emergency generator had to be blown in). 

90 per cent of the economy in Boscastle is based on tourism and there were still three weeks of the summer holidays left; twenty accommodation providers were shut.

Visitors whose cars had been washed away were not able to leave.

A speedy, well-co-ordinated and well-resourced rescue operation ensured that remarkably there was no loss of life. Even by the standards of developed countries, this was outstanding and a tribute to Britain's rescue services.

Emergency workers rescued residents and holiday-makers from a 32 km stretch of the north Cornwall coast.

Hundreds were evacuated from homes, rooftops (120 from rooftops), trees and vehicles.

Seven helicopters from the Coastguards, Royal Navy and RAF were used.

People took emergency shelter in The Rectory, which was on high ground. 

The village was cordoned off by building inspectors for the clean-up operation.

People dug out guttering and removed rubble so that the water could flow away.

Sandbagging was used as a form of defence.

People came to see the catastrophe.

Prince Charles and the Deputy Prime Minister at the time, John Prescott, came to see the damage.

There was a church service to give thanks that no one had died.

The repairs were very costly and time consuming.

There was a huge fund-raising effort to help rebuild the village.

Insurance is now costlier in Boscastle. 

Flood Control and Prevention

The Environment Agency carried out a major investigation.

A £2 million grant was given to Boscastle to help with flood prevention.

No more schools or old people's homes are built in the valley.

The Environment Agency removed debris from upstream, which meant there was more room for the water to flow freely under the new bridge.

A flood defence system (building a flood wall, widening the River Jordan, raising car parks, removing bridges and using relief channels) was planned and is now complete. This also included building a high-arched single-span bridge which would not impeded flood water debris.

Boscastle Floods - 10 Years On

Only watch the first 11.07 minutes of the video.

Click here to return to the Home page.

Flooding Case Study: Consequences of Boscastle

Consequences of the boscastle flash flood in 2004.

There were immediate and long-term consequences of the Boscastle flash flood that happened on 16th August, 2004. These consequences included:

Illustrative background for Decreased tourism

Decreased tourism

  • The flood happened during the peak season for tourism.
  • People think that the flood cost the town £50 million in damage and lost income.

Illustrative background for Flood damage

Flood damage

  • 58 properties were flooded. 4 of these were destroyed.
  • 150 cars were swept away.
  • Roads and bridges were destroyed.

Illustrative background for Evacuation was difficult

Evacuation was difficult

  • Evacuation was difficult because the flooding happened so fast.
  • 100 people were airlifted to safety.

Illustrative background for Environmental pollution

Environmental pollution

  • Environmental pollution happened as a result of about 150 cars being transported by the floodwater into the sea. 30 cars were swept out to sea.
  • 1,850 tonnes of flood debris were recovered from the surrounding area.

Illustrative background for Illness and injury

Illness and injury

  • Nobody was seriously injured. Most of the harm was due to stress and mental health.

1 Geography Skills

1.1 Mapping

1.1.1 Map Making

1.1.2 OS Maps

1.1.3 Grid References

1.1.4 Contour Lines

1.1.5 Symbols, Scale and Distance

1.1.6 Directions on Maps

1.1.7 Describing Routes

1.1.8 Map Projections

1.1.9 Aerial & Satellite Images

1.1.10 Using Maps to Make Decisions

1.2 Geographical Information Systems

1.2.1 Geographical Information Systems

1.2.2 How do Geographical Information Systems Work?

1.2.3 Using Geographical Information Systems

1.2.4 End of Topic Test - Geography Skills

2 Geology of the UK

2.1 The UK's Rocks

2.1.1 The UK's Main Rock Types

2.1.2 The UK's Landscape

2.1.3 Using Rocks

2.1.4 Weathering

2.2 Case Study: The Peak District

2.2.1 The Peak District

2.2.2 Limestone Landforms

2.2.3 Quarrying

3 Geography of the World

3.1 Geography of America & Europe

3.1.1 North America

3.1.2 South America

3.1.3 Europe

3.1.4 The European Union

3.1.5 The Continents

3.1.6 The Oceans

3.1.7 Longitude

3.1.8 Latitude

3.1.9 End of Topic Test - Geography of the World

4 Development

4.1 Development

4.1.1 Classifying Development

4.1.3 Evaluation of GDP

4.1.4 The Human Development Index

4.1.5 Population Structure

4.1.6 Developing Countries

4.1.7 Emerging Countries

4.1.8 Developed Countries

4.1.9 Comparing Development

4.2 Uneven Development

4.2.1 Consequences of Uneven Development

4.2.2 Physical Factors Affecting Development

4.2.3 Historic Factors Affecting Development

4.2.4 Human & Social Factors Affecting Development

4.2.5 Breaking Out of the Poverty Cycle

4.3 Case Study: Democratic Republic of Congo

4.3.1 The DRC: An Overview

4.3.2 Political & Social Factors Affecting Development

4.3.3 Environmental Factors Affecting the DRC

4.3.4 The DRC: Aid

4.3.5 The Pros & Cons of Aid in DRC

4.3.6 Top-Down vs Bottom-Up in DRC

4.3.7 The DRC: Comparison with the UK

4.3.8 The DRC: Against Malaria Foundation

4.4 Case Study: Nigeria

4.4.1 The Importance & Development of Nigeria

4.4.2 Nigeria's Relationships with the Rest of the World

4.4.3 Urban Growth in Lagos

4.4.4 Population Growth in Lagos

4.4.5 Factors influencing Nigeria's Growth

4.4.6 Nigeria: Comparison with the UK

5 Weather & Climate

5.1 Weather

5.1.1 Weather & Climate

5.1.2 Components of Weather

5.1.3 Temperature

5.1.4 Sunshine, Humidity & Air Pressure

5.1.5 Cloud Cover

5.1.6 Precipitation

5.1.7 Convectional Precipitation

5.1.8 Frontal Precipitation

5.1.9 Relief or Orographic Precipitation

5.1.10 Wind

5.1.11 Extreme Wind

5.1.12 Recording the Weather

5.1.13 Extreme Weather

5.2 Climate

5.2.1 Climate of the British Isles

5.2.2 Comparing Weather & Climate London

5.2.3 Climate of the Tropical Rainforest

5.2.4 End of Topic Test - Weather & Climate

5.3 Tropical Storms

5.3.1 Formation of Tropical Storms

5.3.2 Features of Tropical Storms

5.3.3 The Structure of Tropical Storms

5.3.4 Tropical Storms Case Study: Katrina Effects

5.3.5 Tropical Storms Case Study: Katrina Responses

6 The World of Work

6.1 Tourism

6.1.1 Landscapes

6.1.2 The Growth of Tourism

6.1.3 Benefits of Tourism

6.1.4 Economic Costs of Tourism

6.1.5 Social, Cultural & Environmental Costs of Tourism

6.1.6 Tourism Case Study: Blackpool

6.1.7 Ecotourism

6.1.8 Tourism Case Study: Kenya

7 Natural Resources

7.1.1 What are Rocks?

7.1.2 Types of Rock

7.1.4 The Rock Cycle - Weathering

7.1.5 The Rock Cycle - Erosion

7.1.6 What is Soil?

7.1.7 Soil Profiles

7.1.8 Water

7.1.9 Global Water Demand

7.2 Fossil Fuels

7.2.1 Introduction to Fossil Fuels

7.2.2 Fossil Fuels

7.2.3 The Global Energy Supply

7.2.5 What is Peak Oil?

7.2.6 End of Topic Test - Natural Resources

8.1 River Processes & Landforms

8.1.1 Overview of Rivers

8.1.2 The Bradshaw Model

8.1.3 Erosion

8.1.4 Sediment Transport

8.1.5 River Deposition

8.1.6 River Profiles: Long Profiles

8.1.7 River Profiles: Cross Profiles

8.1.8 Waterfalls & Gorges

8.1.9 Interlocking Spurs

8.1.10 Meanders

8.1.11 Floodplains

8.1.12 Levees

8.1.13 Case Study: River Tees

8.2 Rivers & Flooding

8.2.1 Flood Risk Factors

8.2.2 Flood Management: Hard Engineering

8.2.3 Flood Management: Soft Engineering

8.2.4 Flooding Case Study: Boscastle

8.2.5 Flooding Case Study: Consequences of Boscastle

8.2.6 Flooding Case Study: Responses to Boscastle

8.2.7 Flooding Case Study: Bangladesh

8.2.8 End of Topic Test - Rivers

8.2.9 Rivers Case Study: The Nile

8.2.10 Rivers Case Study: The Mississippi

9.1 Formation of Coastal Landforms

9.1.1 Weathering

9.1.2 Erosion

9.1.3 Headlands & Bays

9.1.4 Caves, Arches & Stacks

9.1.5 Wave-Cut Platforms & Cliffs

9.1.6 Waves

9.1.7 Longshore Drift

9.1.8 Coastal Deposition

9.1.9 Spits, Bars & Sand Dunes

9.2 Coast Management

9.2.1 Management Strategies for Coastal Erosion

9.2.2 Case Study: The Holderness Coast

9.2.3 Case Study: Lyme Regis

9.2.4 End of Topic Test - Coasts

10 Glaciers

10.1 Overview of Glaciers & How They Work

10.1.1 Distribution of Glaciers

10.1.2 Types of Glaciers

10.1.3 The Last Ice Age

10.1.4 Formation & Movement of Glaciers

10.1.5 Shaping of Landscapes by Glaciers

10.1.6 Glacial Landforms Created by Erosion

10.1.7 Glacial Till & Outwash Plain

10.1.8 Moraines

10.1.9 Drumlins & Erratics

10.1.10 End of Topic Tests - Glaciers

10.1.11 Tourism in Glacial Landscapes

10.1.12 Strategies for Coping with Tourists

10.1.13 Case Study - Lake District: Tourism

10.1.14 Case Study - Lake District: Management

11 Tectonics

11.1 Continental Drift & Plate Tectonics

11.1.1 The Theory of Plate Tectonics

11.1.2 The Structure of the Earth

11.1.3 Tectonic Plates

11.1.4 Plate Margins

11.2 Volcanoes

11.2.1 Volcanoes & Their Products

11.2.2 The Development of Volcanoes

11.2.3 Living Near Volcanoes

11.3 Earthquakes

11.3.1 Overview of Earthquakes

11.3.2 Consequences of Earthquakes

11.3.3 Case Study: Christchurch, New Zealand Earthquake

11.4 Tsunamis

11.4.1 Formation of Tsunamis

11.4.2 Case Study: Japan 2010 Tsunami

11.5 Managing the Risk of Volcanoes & Earthquakes

11.5.1 Coping With Earthquakes & Volcanoes

11.5.2 End of Topic Test - Tectonics

12 Climate Change

12.1 The Causes & Consequences of Climate Change

12.1.1 Evidence for Climate Change

12.1.2 Natural Causes of Climate Change

12.1.3 Human Causes of Climate Change

12.1.4 The Greenhouse Effect

12.1.5 Effects of Climate Change on the Environment

12.1.6 Effects of Climate Change on People

12.1.7 Climate Change Predictions

12.1.8 Uncertainty About Future Climate Change

12.1.9 Mitigating Against Climate Change

12.1.10 Adapting to Climate Change

12.1.11 Case Study: Bangladesh

13 Global Population & Inequality

13.1 Global Populations

13.1.1 World Population

13.1.2 Population Structure

13.1.3 Ageing Populations

13.1.4 Youthful Populations

13.1.5 Population Control

13.1.6 Mexico to USA Migration

13.1.7 End of Topic Test - Development & Population

14 Urbanisation

14.1 Urbanisation

14.1.1 Rural Characterisitcs

14.1.2 Urban Characteristics

14.1.3 Urbanisation Growth

14.1.4 The Land Use Model

14.1.5 Rural-Urban Pull Factors

14.1.6 Rural-Urban Push Factors

14.1.7 The Impacts of Migration

14.1.8 Challenges of Urban Areas in Developed Countries

14.1.9 Challenges of Urban Areas in Developing Countries

14.1.10 Urban Sustainability

14.1.11 Case Study: China's Urbanisation

14.1.12 Major UK Cities

14.1.13 Urbanisation in the UK

14.1.14 End of Topic Test- Urbanisation

14.1.15 End of Topic Test - Urban Issues

15 Ecosystems

15.1 The Major Biomes

15.1.1 Distribution of Major Biomes

15.1.2 What Affects the Distribution of Biomes?

15.1.3 Biome Features: Tropical Forests

15.1.4 Biome Features: Temperate Forests

15.1.5 Biome Features: Tundra

15.1.6 Biome Features: Deserts

15.1.7 Biome Features: Tropical Grasslands

15.1.8 Biome Features: Temperate Grasslands

15.2 Case Study: The Amazon Rainforest

15.2.1 Interdependence of Rainforest Ecosystems

15.2.2 Nutrient Cycling in Tropical Rainforests

15.2.3 Deforestation in the Amazon

15.2.4 Impacts of Deforestation in the Amazon

15.2.5 Protecting the Amazon

15.2.6 Adaptations of Plants to Rainforests

15.2.7 Adaptations of Animals to Rainforests

16 Life in an Emerging Country

16.1 Case Studies

16.1.1 Mumbai: Opportunities

16.1.2 Mumbai: Challenges

17 Analysis of Africa

17.1 Africa

17.1.1 Desert Biomes in Africa

17.1.2 The Semi-Desert Biome

17.1.3 The Savanna Biome

17.1.4 Overview of Tropical Rainforests

17.1.5 Colonisation History

17.1.6 Population Distribution in Africa

17.1.7 Economic Resources in Africa

17.1.8 Urbanisation in Africa

17.1.9 Africa's Location

17.1.10 Physical Geography of Africa

17.1.11 Desertification in Africa

17.1.12 Reducing the Risk of Desertification

17.1.13 Case Study: The Sahara Desert - Opportunities

17.1.14 Case Study: The Sahara Desert - Development

18 Analysis of India

18.1 India - Physical Geography

18.1.1 Geographical Location of India

18.1.2 Physical Geography of India

18.1.3 India's Climate

18.1.4 Natural Disasters in India

18.1.5 Case Study: The Thar Desert

18.1.6 Case Study: The Thar Desert - Challenges

18.2 India - Human Geography

18.2.1 Population Distribution in India

18.2.2 Urabinsation in India

18.2.3 The History of India

18.2.4 Economic Resources in India

19 Analysis of the Middle East

19.1 The Middle East

19.1.1 Physical Geography of the Middle East

19.1.2 Human Geography of the Middle East

19.1.3 Climate Zones in the Middle East

19.1.4 Climate Comparison with the UK

19.1.5 Oil & Natural Gas in the Middle East

19.1.6 Water in the Middle East

19.1.7 Population of the Middle East

19.1.8 Development Case Studies: The UAE

19.1.9 Development Case Studies: Yemen

19.1.10 Supporting Development in Yemen

19.1.11 Connection to the UK

19.1.12 Importance of Oil

19.1.13 Oil & Tourism in the UAE

20 Analysis of Bangladesh

20.1 Bangladesh Physical Geography

20.1.1 Location of Bangladesh

20.1.2 Climate of Bangladesh

20.1.3 Rivers in Bangladesh

20.1.4 Flooding in Bangladesh

20.2 Bangladesh Human Geography

20.2.1 Population Structure in Bangladesh

20.2.2 Urbanisation in Bangladesh

20.2.3 Bangladesh's Economy

20.2.4 Energy & Sustainability in Bangladesh

21 Analysis of Russia

21.1 Russia's Physical Geography

21.1.1 Russia's Climate

21.1.2 Russia's Landscape

21.2 Russia's Human Geography

21.2.1 Population of Russia

21.2.2 Russia's Economy

21.2.3 Energy & Sustainability in Russia

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Flooding Case Study: Boscastle

Flooding Case Study: Responses to Boscastle

IMAGES

  1. Boscastle Flooding Case Study

    boscastle flood case study pdf

  2. PPT

    boscastle flood case study pdf

  3. Boscastle 2004 Case Study Lesson

    boscastle flood case study pdf

  4. Boscastle Flood Case Study

    boscastle flood case study pdf

  5. The Boscastle flood of 2004

    boscastle flood case study pdf

  6. Geography Lesson- UK Flooding- Boscastle 2004 case study

    boscastle flood case study pdf

VIDEO

  1. Отлив.Boscastle

  2. MEDC Case Study: Boscastle

  3. Boscastle flood

  4. PRES. RUTO GO TO KOOME TO FILE FLOOD CASE #trendindnews #rutolivetoday @kenyacitizentv @NTV

  5. FlowStop Anti Flood

  6. Boscastle 2

COMMENTS

  1. Boscastle Case Study GCSE

    Boscastle Case Study GCSE. On the 16th of August 2004 Boscastle was hit by a flash flood due to extreme rainfall - 200mm of rain fell in 24 hours.

  2. Royal Meteorological Society Case Study

    Floods Devastate Village. On 16 August 2004, a devastating flood swept through the small Cornish village of Boscastle. Very heavy rain fell in storms close to the village, causing two rivers to burst their banks. About two billion litres of water then rushed down the valley straight into Boscastle.

  3. PDF The Boscastle flood of 2004 A case study of cause, effect and response

    Causes. Approximately 200 mm of rain fell in 24 hours. The ground was saturated from previous rain storms i.e. a short lag time. The drainage basin has steep slopes. The drainage basin has areas of impermeable rock. Boscastle is at the confluence of three rivers. The flooding coincided with a high tide.

  4. PDF Case Studies, Boscastle and Barèges.

    Floods Case Study Boscastle Basic Facts and Figures Flood event began at 5.00pm on Monday 16th August 2004 185mm rain fell over a period of 8 hours over the 20 sq km (7.7sq miles) catchment area. Remnants of Hurricane Alex. Rain fell on ground already saturated reducing infiltration The Rivers Valency and Jordon meet in Boscastle and these rose ...

  5. PDF The floods in Boscastle and North Cornwall 16 August 2004

    We used this study to advise North Cornwall District ... case the powers lie with North Cornwall District Council. Environment Agency The floods in Boscastle and North Cornwall August 2004 05. ... A contemporary account details the Boscastle flood of 28 October 1827: 'The whole street was filled with a ...

  6. PDF Major Flooding at Boscastle

    The first rainfall was recorded above Boscastle at about 12.30 p.m., with heavy rainfall over a concentrated area falling for the next hours. It is estimated that 1,422 million litres of rain fell in just two hours, with some areas in North Cornwall recording 200+ mm of rainfall between 11.00 a.m. and 6.00 p.m.

  7. PDF Geofile Online APRIL 2005 494

    case today. Boscastle, too, will be restored, with some essential adjustments, largely within a few months of the flood event itself. The settlement of Boscastle Boscastle is a small village on the north Cornish coast (Figure 1). Lying at the mouth of the River Valency, it is surrounded by fairly steep, often wooded slopes. Just upstream from the

  8. 2004 Boscastle flood

    The 2004 Boscastle flood ... Boscastle flood study findings (Environment Agency, 12 January 2005) Boscastle Flood Rescue operation helis.com database operations page; UK Floods-Case studies of causes and effects and flooding policies, Boscastle Flood- 16 August 2004 (subscription required)

  9. Boscastle Floods

    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. Huge amounts of water from this sudden downpour flowed into two rivers, the Valency and Jordan (which flows into the Valency just above Boscastle). Both overflowed, and this caused a sudden rush of water to speed down the ...

  10. The Boscastle Flood: Meteorological analysis of the ...

    The 2004 Boscastle flash flood, in the U.K. was selected as a typical case study. Firstly, the appropriateness of the " simplification strategy " was investigated, as a flood risk assessment tool ...

  11. PDF Date

    Extra notes for teachers supporting teaching of the Boscastle case study The Boscastle flood carries an important lesson - human societies should expect that unexpected things will sometimes happen. Rounding off teaching of this first part of the Unit, encourage students to think about reasons why, as a society, we can't always

  12. The Boscastle flood: Meteorological analysis of the conditions leading

    The Boscastle flood: Meteorological analysis of the conditions leading to flooding on 16 August 2004. Brian Golding, Corresponding Author. Brian Golding ... PDF. Tools. Request permission; Export citation; Add to favorites; Track citation; Share Share. Give access. Share full text access.

  13. Flood Management Scheme

    Boscastle Flood - On the 16th August 2004, a devastating flood swept through Boscastle, a small village on the north Cornwall coast. Very heavy rain fell in storms close to the village, with over 60mm of rainfall in two hours. ... The Great Floods of 2000; Kerala flood case study; Rocks, Resources and Scenery. Geological time is on a different ...

  14. Boscastle Flood Case Study

    Boscastle Flood Case Study - Free download as PDF File (.pdf), Text File (.txt) or read online for free.

  15. Case study: Boscastle

    Boscastle is a small coastal settlement in the south west of England. It flooded in August 2004, washing cars and buildings into the sea and putting peoples' lives in danger. £4.5 million has ...

  16. PDF Boscastle and North Cornwall Floods, August 2004: Implications for Dam

    This paper reflects on the implications of the findings of the studies for dam engineers. Whilst the floods affected both the Valency/Jordan and Crackington catchments, this paper concentrates on the Valency/Jordan catchment only. THE CATCHMENT Figure 1 shows the geographical location of the Valency river and its tributaries above Boscastle ...

  17. 3.13 Case Study

    Effects. 50 cars were swept into the harbour. The bridge was washed away and roads were submerged under 2.75 m of water, making communication difficult. The sewerage system burst. For health and safety reasons Boscastle was declared inaccessible. The Museum of Withcraft lost 50 per cent of its artefacts.

  18. Boscastle 2004 MEDC Floods. Geography case study

    Boscastle. Boscastle 2004 MEDC Floods. Geography case study. 1. BOSCASTLE MEDC FLOODING- CAUSES/EFFECTS AND MANAGEMENT STRAGIES Causes:Physical -Stormy weather up to flood meant saturated ground -Steep saturated sides of Valency Valley meant increased surface run off and therefore discharge volume -Impermeable rock at Bodmin moor prevented ...

  19. PDF Managing Floods at Boscastle

    The flood management scheme cost over £4 million, but the scheme isn't as good as it could be -some options were still considered too expensive. The new defences have made Boscastle a safer place to live in. The defences will only protect against a 1 in 75 year flood -they won't prevent flooding of the same size as the 2004 flood. The

  20. The boscastle flood (August 2004)

    The boscastle flood (August 2004) - case study. The document summarizes information about the 2004 Boscastle flood in Cornwall, England. Heavy rainfall of 185mm in 5 hours caused the rivers Valency and Jordan to flood the village. The steep sides and lack of floodplains meant surface runoff rapidly increased.

  21. Boscastle Case Study

    Boscastle Case Study - Free download as PDF File (.pdf), Text File (.txt) or read online for free.

  22. Flooding Case Study: Consequences of Boscastle

    Illness and injury. Nobody was seriously injured. Most of the harm was due to stress and mental health. There were immediate and long-term consequences of the Boscastle flash flood that happened on 16th August, 2004. These consequences included:

  23. The Boscastle flood of 2004

    The flood on 16 August 2004 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. There was a combination of human and physical causes contributing to a series of effects and impacts. The responses to the flood were both short and long term.