world at risk 3 risk and hazard trends

8/21/2019 World at Risk 3 Risk and Hazard Trends

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Recap

Recap what the following terms mean Natural Hazard

Disaster

Risk Vulnerability

Hydro- meteorological hazard

Geophysical Hazard


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Recap Look at the following list of hazardous

events and decide if it is a natural eventornatural 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 unpopulatedisland 5- An avalanche in a ski resort 6- An avalanche high on mountainous slopes

remote from any settlement


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Learning Objectives K- Know how to use the disaster risk

equation

U- Understand how vulnerability ofpeople is a result of a number offactors

S- Know how to use the disaster risk

equation in relation to a namedcountry case study


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1.3 : Global hazards


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The Disaster Risk Equation

Hazards x Vulnerability Risk = Capacity

The risk of disaster grows as globalhazards and peoples vulnerabilityincreases, while their capacity to copedecreases

MEDCs LEDCs

Increasing vulnerability in some respects


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The Disaster Risk Equation

Important to know that vulnerability is notthe same as poverty!

E.g Earthquake It is possible for middle class to be more

affected by the collapse of their unsafehomes than the poor in a shanty townwhose flimsy homes collapse and cause

little damage


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Vulnerability Factors

Either bullet point or produce spider diagramsto explain how the following factors can effectvulnerability

Wealth of people Technical ability of a country Education Age Rural Urban


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Other things to considerbetween LEDCs and MEDCs


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Importance of Vulnerability

The impact of any hazard are a resultof peoples vulnerability not necessarilythe hazards strength. People remain

exposed to risk (ie vulnerability) for avariety of reasons

1. Vulnerable people do not live indangerous places because they want to;they do it because they have to. Landmay be cheaper, or unwanted by others


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2. Vulnerable people cannot afford tobuild well, even if building regulations

are enforced.

3 R id b i ti h f d th


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3. Rapid urbanisation has forced thepoor into high risk areas of cities


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4. Changing risk Rising sea levels meanthat safe areas are now prone to

flooding & storm surges. Deforestationof watersheds reduces interception &increases the risk of flooding.

5. Cost v Benefits eg benefits of fertilesoils on volcanoes v risk of eruption

To en


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To en Which part of the disaster risk

equation is missing?Hazards x

Risk = Capacity

Hazards x Vulnerability

Risk =x

Risk = Capacity


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world at risk 3 risk and hazard trends

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