Natural Hazards Flashcards
What 7 factors are used to classify natural hazards?
- Magnitude
- Frequency
- Duration
- Areal extent
- Spatial concentration
- Speed of onset
- Regularity
Name 5 factors determining vulnerability.
- technical expertise
- educational awareness
- health and age of individuals
- wealth of individuals and society
- organisational level
What are 4 key concepts when analysing hazards?
- Hazard
- Disaster
- Vulnerability
- Risk
- Resilience
Define Hazard
a potential threat to humans and their welfare
Define Disaster
when the losses of a functional community exceed their ability to cope using their own resources
Define Vulnerability
characteristics determining the susceptibility of a community to the impacts of hazards
Define Risk
the probability of loss resulting from the interaction of a hazard and vulnerability
Define Resilience
a measure of a community’s ability to absorb and recover from the occurrence of a hazardous event
Define primary hazards
an impact of a hazard that occurs as a direct consequence
Define secondary hazards
a subsequent impact of a hurricane
Why are hazards increasing?
- change in global temperatures and weather patterns
- higher sea surface temperature due to increasing air temperature caused by increased CO2.
Why is vulnerability increasing
- increasing population
- rapid industrialisation has resulted in poor infrastructure
Why is resilience decreasing?
- more intense hazards
- smaller gap between hazards leave less time for recovery
Give a statistic show increasing occurrence of hazards/ increasing vulnerability
see earth hazards pack - lacey
