Flooding in Boscastle 16th August 2004. Map of Boscastle. Aerial Photo. MUST: Annotate images and diagrams to show the causes and effects of the Boscastle.

Slides:

Advertisements

Similar presentations

RIVER DRAINAGE BASINS.

Advertisements

Location of Boscastle Boscastle is a picturesque, rural village, and is popular with tourists. It is located on the northern coast of Cornwall, in the.

Boscastle August 2004 Case Study of a flooding incident in the U.K. What are we learning today Dino? The location of Boscastle. The cause of the flood.

Management of future floods at Cockermouth LO: To be able to explain how a specific riverine area has been managed.

Flooding Case Study - Boscastle

Situated in the South East of the UK, and the North of Cornwall Boscastle is home to nearly 2000 people and attracts 1.2 Million people per year.

Surface Water Chapter 9.

wriggling like a snake down the

Chapter 9 Water Erosion and Deposition

1 Why do we get floods? Where did all the water come from?

The Graded River and Base Level

The Lynmouth Flood 1952.

1.Describe the scene (4 lines) 2.Come up with 2 newspaper titles which could accompany this image One serious one not!

The Lynmouth Flood 1952 Student Assignment Name __________________________________Group ____ Score/100 ________ Section Points Score Where is Lynmouth?7.

Today we are going to build a case study of flooding in Bangladesh. This will contrast with the MEDC case study of Boscastle that we have already studied.

Carlisle Case Study Using an Atlas, describe the location of Carlise.

Rivers. Long and cross profiles Processes of erosion, deposition and transportation The characteristics and formation of waterfalls and gorges The characteristics.

WHAT CAN YOU REMEMBER? ocean land 2) _________ 3) _________

Chapter 6 Section 1 – Running Water

Flooding in Boscastle 16th August Map of Boscastle. Aerial Photo.

Use this PowerPoint to complete the brainstorm on the topic of ‘Water’

Flood hydrographs. Flood risk factors Increase riskDecrease risk Impermeable rockPermeable rock Urbanisation (towns/cities with surfaces such as tarmac)

Surface Water Chapter 9.

A 328ft (100m) section of the north bank of the River Derwent was under threat from erosion About 3,000 tonnes of limestone blocks were placed 20ft (6m)

LYNMOUTH FLOOD 1952 …it’s going to be a very wet tale…

Disaster at Lynmouth. Date15 and 16 August 1952 How Long?1 night LocationLynmouth, Simonsbath, Filleigh, Middleham (never rebuilt) Deaths34 Protery.

What are the causes and consquences of flooding?.

Hydrosphere Revision. Hydrosphere Questions Most commonly asked questions, every 2 years on average, are those related to OS maps and those which ask.

Pgs Learning Objective and Learning Outcomes Learning Objective: To understand the causes, effects and management of river flooding Learning Outcomes:

RIVER DRAINAGE BASINS. A RIVER SYSTEM ACTS LIKE A SYSTEM OF DOWNPIPES AND GUTTERING ON A HOUSE - IT ALLOWS THE MOVEMENT OF RAINWATER INTO THE SEA.

HoustonWater. Houston, Texas is the largest city in the state of Texas and fourth largest in the nation. The city was founded in 1836 and has grown steadily.

The small Cornish village of Boscastle is not prone to regular annual flooding as many locations affected by extreme flooding events are. The village.

FLOOD DEFENCES ALONG THE R. MEDWAY AROUND TONBRIDGE.

“Boscastle: The village washed on to the map”. Write a question about the image in your book.

What is the hydrological cycle? Key Theme: Rivers Precipitation Condensation Surface Runoff Transpiration Infiltration Throughflow Evaporation Groundwater.

Explorers Education Programme: Flooding & Coastal Communities.

What are the effects of floods?

Section 3: Stream Deposition

Flash floods By Aidan. What is Extreme Weather ? Extreme weather is when a weather event is significantly different from the average or usual weather.

Boscastle. Causes Heavy localised rainfall – 89 mm of rainfall in a period of an hour. The ground was saturated by previous rainfall. The village of Boscastle.

(b)Study Figure 2 which is an extract from a news website about the cause of floods in Pakistan in August With the help of Figure 2 explain why.

York floods November mm rain in 24 hours 3000 people evacuated, Army called in to help Ouse 4.8m above normal levels 80,000 sandbags used.

Homework to complete this PowerPoint exercise and create a case study to add to your notes. Due Friday 22 nd Jan 2016.

What are the management challenges associated with the development of river landscapes? Managing river landscapes is often about balancing socio-economic.

BOSCASTLE 2004 LO – To understand the causes, effects and responses to the flood event.

Chapter 2: The Flow of Freshwater. Draw the water cycle diagram in your daybook and label it in your own words. p.41 in your text.

Boscastle Floods, 16 th August Boscastle Floods, 16 th August 2004 – Causes:  Over 70mm of rain fell in just two hours  The ground was already.

A RIVER SYSTEM ACTS LIKE A SYSTEM OF DOWNPIPES AND GUTTERING ON A HOUSE - IT ALLOWS THE MOVEMENT OF RAINWATER INTO THE SEA.

Weather and Climate Weather is becoming more extreme Evidence Evidence Events e.g. Boscastle 2004 and summer 2003 heatwave Events e.g. Boscastle 2004 and.

A flash flood that shocked the country.

Which flood? Boscastle 2004 Bangladesh 2004 Slow onset Flood

Boscastle flooding 2004.

Boscastle - the most frightening flood of the decade?

Marium, Alex, Billy, Ollie

Acknowledgments: Wikipedia, the free encyclopedia

Flooding in Boscastle 16th August 2004.

Boscastle Flood Tash Merrett

River System Development

What causes rivers to flood?

Why do Rivers Flood and How Can They be Managed?

The Flow of Freshwater.

Flooding Saturday, 23 February 2019

Boscastle Floods, 2004 To compare the causes and impacts of flooding in Boscastle (2004) to Lynmouth (1952). Starter: Write down some ideas for a flood.

Lesson six: Explaining (and describing) hydrographs

Flooding and River Management

KS3 Geography Rivers & rocks.

Presentation transcript:

Flooding in Boscastle 16th August 2004

Map of Boscastle. Aerial Photo. MUST: Annotate images and diagrams to show the causes and effects of the Boscastle flood. SHOULD: Categorise the effects of flooding. Identify ways that flooding can be reduced. COULD: Evaluate methods of flood protection and suggest alternative methods.

The Boscastle Drainage Basin Rainfall in this area is high so... The valley sides are steep so … Trees have been cut down above the river. This could make flooding worse because... The mouth of the river is narrow so… Settlements have been built upstream. This could mean… MUST: Annotate images and diagrams to show the causes and effects of the Boscastle flood. SHOULD: Categorise the effects of flooding. Identify ways that flooding can be reduced. COULD: Evaluate methods of flood protection and suggest alternative methods.

The narrow valley can be appreciated when looking upstream from the harbour. MUST: Annotate images and diagrams to show the causes and effects of the Boscastle flood. SHOULD: Categorise the effects of flooding. Identify ways that flooding can be reduced. COULD: Evaluate methods of flood protection and suggest alternative methods.

Causes of the flood: 1.Heavy localised rainfall. 89mm of rain fell in an hour. 2.Saturated ground from previous rainfall. 3.Topography of the land – the landscape upstream of Boscastle acts as a funnel, directing vast volumes of water into the village. The valley sides are steep sided. 4.Narrow river channels in the village itself. MUST: Annotate images and diagrams to show the causes and effects of the Boscastle flood. SHOULD: Categorise the effects of flooding. Identify ways that flooding can be reduced. COULD: Evaluate methods of flood protection and suggest alternative methods.

Saturated ground. MUST: Annotate images and diagrams to show the causes and effects of the Boscastle flood. SHOULD: Categorise the effects of flooding. Identify ways that flooding can be reduced. COULD: Evaluate methods of flood protection and suggest alternative methods.

MUST: Annotate images and diagrams to show the causes and effects of the Boscastle flood. SHOULD: Categorise the effects of flooding. Identify ways that flooding can be reduced. COULD: Evaluate methods of flood protection and suggest alternative methods.

The ground is saturated so any further rain can’t be absorbed so.. The river reaches bankful stage. Any further water will lead to… The discharge is.. The velocity is.. The river is discoloured because.. The carrying capacity of the river has increased because.. MUST: Annotate images and diagrams to show the causes and effects of the Boscastle flood. SHOULD: Categorise the effects of flooding. Identify ways that flooding can be reduced. COULD: Evaluate methods of flood protection and suggest alternative methods.

MUST: Annotate images and diagrams to show the causes and effects of the Boscastle flood. SHOULD: Categorise the effects of flooding. Identify ways that flooding can be reduced. COULD: Evaluate methods of flood protection and suggest alternative methods.

In an operation lasting from mid-afternoon until 2:30 AM, a fleet of seven helicopters rescued about 150 people clinging to trees and the roofs of buildings and cars. Amazingly, no major injuries or loss of life were reported. About 90% of Boscastle’s economy is tourism and about 2/3 of this income usually occurred during the school holidays. MUST: Annotate images and diagrams to show the causes and effects of the Boscastle flood. SHOULD: Categorise the effects of flooding. Identify ways that flooding can be reduced. COULD: Evaluate methods of flood protection and suggest alternative methods.

Impacts of the flood: Around 115 cars were washed into the sea Several boats were also lost, 6 buildings were destroyed Loss of tourist trade Fall in house prices B3263 road was blocked by flood waters businesses destroyed including visitor centre Economic damage estimated 2006 = £300 million Seven helicopters rescued about 150 people No major injuries or loss of life were reported. About 90% of Boscastle’s economy is tourism based and about 2/3 of this income usually occurred during the school holidays. House prices fell as houses termed flood risks MUST: Annotate images and diagrams to show the causes and effects of the Boscastle flood. SHOULD: Categorise the effects of flooding. Identify ways that flooding can be reduced. COULD: Evaluate methods of flood protection and suggest alternative methods.

MUST: Annotate images and diagrams to show the causes and effects of the Boscastle flood. SHOULD: Categorise the effects of flooding. Identify ways that flooding can be reduced. COULD: Evaluate methods of flood protection and suggest alternative methods.

How have decision makers responded? A £4.5m scheme to improve flood defences. Boscastle main car park. MUST: Annotate images and diagrams to show the causes and effects of the Boscastle flood. SHOULD: Categorise the effects of flooding. Identify ways that flooding can be reduced. COULD: Evaluate methods of flood protection and suggest alternative methods.

The scheme stretches along the valley, incorporating drainage, sewerage systems and land re-grading. MUST: Annotate images and diagrams to show the causes and effects of the Boscastle flood. SHOULD: Categorise the effects of flooding. Identify ways that flooding can be reduced. COULD: Evaluate methods of flood protection and suggest alternative methods.

Boscastle car park is being raised in height. This will stop the river from bursting it’s banks so easily. The river lies here. MUST: Annotate images and diagrams to show the causes and effects of the Boscastle flood. SHOULD: Categorise the effects of flooding. Identify ways that flooding can be reduced. COULD: Evaluate methods of flood protection and suggest alternative methods.

This drain allows water to run into the lower section of the river quickly. Boscastle flood defences. MUST: Annotate images and diagrams to show the causes and effects of the Boscastle flood. SHOULD: Categorise the effects of flooding. Identify ways that flooding can be reduced. COULD: Evaluate methods of flood protection and suggest alternative methods.

The river channel is being made deeper and wider so that it can accommodate more water. The lower section of the village. MUST: Annotate images and diagrams to show the causes and effects of the Boscastle flood. SHOULD: Categorise the effects of flooding. Identify ways that flooding can be reduced. COULD: Evaluate methods of flood protection and suggest alternative methods.

New sewerage systems are being put in place. The lower section of the village. MUST: Annotate images and diagrams to show the causes and effects of the Boscastle flood. SHOULD: Categorise the effects of flooding. Identify ways that flooding can be reduced. COULD: Evaluate methods of flood protection and suggest alternative methods.

Bridges that hindered the drainage of the floodwater are being replaced by stronger bridges that are less likely to get blocked. Notice attempts to draw in much needed custom. MUST: Annotate images and diagrams to show the causes and effects of the Boscastle flood. SHOULD: Categorise the effects of flooding. Identify ways that flooding can be reduced. COULD: Evaluate methods of flood protection and suggest alternative methods.

So what’s been done to mitigate against flood reoccurrence? MUST: Annotate images and diagrams to show the causes and effects of the Boscastle flood. SHOULD: Categorise the effects of flooding. Identify ways that flooding can be reduced. COULD: Evaluate methods of flood protection and suggest alternative methods.

. The narrow river Valency channel has now been widened The channel has been deepened The river banks have been raised The bridge has been raised and widened MUST: Annotate images and diagrams to show the causes and effects of the Boscastle flood. SHOULD: Categorise the effects of flooding. Identify ways that flooding can be reduced. COULD: Evaluate methods of flood protection and suggest alternative methods.

Reminders of the flood remain throughout the village. MUST: Annotate images and diagrams to show the causes and effects of the Boscastle flood. SHOULD: Categorise the effects of flooding. Identify ways that flooding can be reduced. COULD: Evaluate methods of flood protection and suggest alternative methods.

Many buildings have indicators to show the height of the flood water. MUST: Annotate images and diagrams to show the causes and effects of the Boscastle flood. SHOULD: Categorise the effects of flooding. Identify ways that flooding can be reduced. COULD: Evaluate methods of flood protection and suggest alternative methods.

Whether flooding is prevented remains to be seen... MUST: Annotate images and diagrams to show the causes and effects of the Boscastle flood. SHOULD: Categorise the effects of flooding. Identify ways that flooding can be reduced. COULD: Evaluate methods of flood protection and suggest alternative methods.

PROGRESS CHECK QUESTIONS: Must…Could.. What were the causes of the Boscastle flood? How did people make the Boscastle flood worse? Name 5 effects of the Boscastle flood.Make 2 lists to show long term and short term effects of the Boscastle flood. How can the risk of flooding be reduced? List 4 ways that flooding can be reduced. For each, say how effective the method would be. MUST: Annotate images and diagrams to show the causes and effects of the Boscastle flood. SHOULD: Categorise the effects of flooding. Identify ways that flooding can be reduced. COULD: Evaluate methods of flood protection and suggest alternative methods.