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Disaster risk equation

Disaster risk equation. WORLD AT RISK. What you should achieve this lesson. Know how to use the disaster risk equation Understand how vulnerability of people is a result of a number of factors Identify recent trends in natural hazard data. recap.

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Disaster risk equation

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  1. Disaster risk equation WORLD AT RISK

  2. What you should achieve this lesson • Know how to use the disaster risk equation • Understand how vulnerability of people is a result of a number of factors • Identify recent trends in natural hazard data

  3. recap • With a partner test each other on what the following terms mean: • Natural Hazard • Disaster • Risk • Vulnerability • Hydro- meteorological hazard • Geophysical Hazard • Chronic Hazard

  4. Natural event or natural hazard 1- A cyclone affecting Hong Kong 2- A hurricane passing over a remote unpopulated island 3- A flood in a rural area which floods the roads, but does not affect any houses 4- A volcano erupting on a remote unpopulated island 5- An avalanche in a ski resort 6- An avalanche high on mountainous slopes remote from any settlement

  5. Which would you pick? • What type of hazard would you prefer to face and why?

  6. Disaster risk equation • Risk is the exposure of people to a hazardous event which may present a potential threat to people or their possessions, including buildings and structures. • What factors can influence the level of risk?

  7. Disaster risk equation • RISK = HAZARD x VULNERABILITY CAPACITY • The risk of disaster grows as global hazards and people’s vulnerability increases, while their capacity to cope decreases MEDCs LEDCs Increasing vulnerability in some respects

  8. vulnerability • Not all of the planet’s population is at the same risk, but millions of people are considered to be vulnerable • Vulnerability is NOT the same as poverty • E.g. an earthquake • The middle class may be more affected by a earthquake as their property could cause more damage when it collapses than a property within a shanty town

  9. vulnerability • Either bullet point or produce spider diagrams to explain how the following factors can effect vulnerability • Wealth of people • Technical ability of a country • Education • Age • Rural • Urban

  10. Why live in a hazardous area?

  11. Is the world more hazardous?

  12. Is the world more hazardous? • It’s clear that the frequency of natural disaster has increased but what factors could influence this? • Technology • International monitoring agencies e.g. CRED or SCSN • http://www.scsn.org/commentary/?cat=2 • Media

  13. Is the world more hazardous?

  14. Is the world more hazardous?

  15. Is the world more hazardous? Is this what you expected?

  16. Is the world more hazardous? • There is a decreasing number of deaths due to hazards – why? • Better understanding of natural disasters • Better preparedness • Better technology This is not the case everywhere

  17. Is the world more hazardous?

  18. Current trends in Natural hazards • Using the textbooks I would like you to annotate each of the graphs provided, giving a description and explanation of the current trends. • Magnitude • Frequency • Number of deaths • Economic costs • Number involved

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