disaster risk equation world at risk. what you should achieve this lesson know how to use the...
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Disaster risk equation
WORLD AT RISK
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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
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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
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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
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Which would you pick?
• What type of hazard would you prefer to face and why?
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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?
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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
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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
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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
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Why live in a hazardous area?
Why live in a
hazardous area
Choice
Unaware of risk
Inertia
Only option
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Is the world more hazardous?
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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
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Is the world more hazardous?
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Is the world more hazardous?
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Is the world more hazardous?
Is this what you expected?
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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
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Is the world more hazardous?
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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