Lesson 7 Flashcards
What is a hazard?
A perceived natural event that has the potential to threaten both life and property
When does a hazard become a disaster?
10 or more people killed and/or 100 people effected
What is the UN’s definition of a disaster?
500 deaths
What is a mega disaster according to the UN?
2000 deaths or 200000 made homeless
When does a hazard turn into a disaster?
When it meets a vulnerable population
What is the risk equation?
Frequency or magnitude of a hazard (H) X level of vulnerability (V) / Capacity of population to cope (C)
What does the PAR model show?
Progression of vulnerability
What does the PAR model include?
Root causes, dynamic pressures, unsafe conditions and hazards.
What does the PAR model factors contribute to?
Showing the risk of a country by showing what areas need improved to reduce risk
What does Degg’s Model show
A disaster only occurs if a vulnerable population is exposed to a hazard.
What factors contribute towards the disaster vulnerability? (2)
Physical environment
Location scale
What makes a physical environment vulnerable? (5)
Dangerous location - plate boundary Unprotected buildings weak economy (poverty) Lack of preparedness Spread of disease
What makes a local scale vulnerable? (6)
Lack of training (education) Rapid population change Rapid urbanisation Debt repayment issues Exploitation of resources Corrupt government
What makes a hazard event? (6)
High winds Floods Drought Landslides Tectonic activity bio hazards
Why do people remain exposed to hazards? (5)
Unpredictability Lack of alternatives Changing levels of risk Russian Roulette Cost vs benefit
How is unpredictability making people exposed to hazards?
Not predictable when hazard may strike or when
Difficult to know magnitude
Human activities and physical changes
How is a lack of alternatives making people exposed to hazards?
Difficult to move - homes, land & employment
most vulnerable = poor - living unsafe
How is changing levels of risk making people exposed to hazards?
deforestation can make an area once safe from flooding more susceptible as well as global warming eg sea level rising
How is Russian roulette making people exposed to hazards?
optimism “turning a blind eye” or “acts of god”
How is cost vs benefit making people exposed to hazards?
hazardous areas offer advantages which out weigh risks such as flood plains have very fertile soils.
What are root causes of the PAR model?
Limited access to power, structure and resources.
Ideologies: political and economic systems
What are the dynamic pressures of the PAR model? (2)
Lack of training/skills in local industry.
Investment in local markets
What are the uncontrollable factors of dynamic pressures? (3)
Rapid population change/urbanisation
Debt repayment
Deforestation
What are the physical unsafe conditions of the PAR model? (2)
Dangerous location
Unprotected buildings