GEOGRAPHY PAPER 3 Flashcards
TECTONICS
1.4 Disaster occurrence can be explained by the relationship between hazards, vulnerability, resilience and disaster.
Define natural hazards.
Any natural process is a potential threat to human life and property.
TECTONICS
1.4 Disaster occurrence can be explained by the relationship between hazards, vulnerability, resilience and disaster.
Define natural disaster.
The realisation of a hazard, when it ‘causes a significant impact on a vulnerable population’.
TECTONICS
1.4 Disaster occurrence can be explained by the relationship between hazards, vulnerability, resilience and disaster.
When does a hazard become a disaster?.
- When 10 or more people are killed and/or 100 people or more are affected
- Large insurers define it as economic losses of over $1.5 million
TECTONICS
1.4 Disaster occurrence can be explained by the relationship between hazards, vulnerability, resilience and disaster.
What is Degg’s model?
A model that shows the interaction between hazards, disasters and human vulnerability.
TECTONICS
1.4 Disaster occurrence can be explained by the relationship between hazards, vulnerability, resilience and disaster.
Why is the relationship between risks, hazards and people complex?
- Unpredictability
- Lack of alternatives
- Dynamic hazards
- Cost-benefit
- ‘Russian roulette reaction’
TECTONICS
1.4 Disaster occurrence can be explained by the relationship between hazards, vulnerability, resilience and disaster.
How can unpredictability make relationships between hazards and people complex?
Many hazards are not predictable; people may be caught out by either the timing or the magnitude of an event.
TECTONICS
1.4 Disaster occurrence can be explained by the relationship between hazards, vulnerability, resilience and disaster.
How can a lack of alternatives make relationships between hazards and people complex?
People may stay in a hazardous area due to a lack of options, this may be for economic reasons (work), lack of space to move, or a lack of skills or knowledge
TECTONICS
1.4 Disaster occurrence can be explained by the relationship between hazards, vulnerability, resilience and disaster.
How can dynamic hazards make relationships between hazards and people complex?
The threat from hazards is not a constant one, and it may increase or decrease over time. Human influence may also change the location or increase the frequency or magnitude of hazardous events.
TECTONICS
1.4 Disaster occurrence can be explained by the relationship between hazards, vulnerability, resilience and disaster.
How can cost-benefit make relationships between hazards and people complex?
The benefits of a hazardous location may well outweigh the risks involved in staying there. Perception of risk may also play a role.
TECTONICS
1.4 Disaster occurrence can be explained by the relationship between hazards, vulnerability, resilience and disaster.
How does Japan compare to Myanmar in terms of hazard exposure?
- Japan - A range of natural hazards and is highly exposed.
- Myanmar - Significantly high natural hazard component due to the potential for tsunami and earthquakes (and floods and storms).
TECTONICS
1.4 Disaster occurrence can be explained by the relationship between hazards, vulnerability, resilience and disaster.
How does Japan compare to Myanmar in terms of vulnerability?
- Japan - Vulnerability is high compared to other wealthy nations due to the ageing population but is still low risk.
- Myanmar - Moderate risk though a relatively low score - few shocks in recent years.
TECTONICS
1.4 Disaster occurrence can be explained by the relationship between hazards, vulnerability, resilience and disaster.
How does Japan compare to Myanmar in terms of coping capacity?
- Japan - Coping capacity is good, the elderly tend to be educated, have high internet connectivity, effective government and low gender inequality.
- Myanmar - Poor coping capacity; low level of internet/mobile phone access for older people; poor education.
TECTONICS
1.4 Disaster occurrence can be explained by the relationship between hazards, vulnerability, resilience and disaster.
How does Japan compare to Myanmar according to the UNISDR?
- Japan - Although Japan is highly exposed it’s ranked 133rd out of 190 due to its strong coping capacity and lower levels of vulnerability.
- Myanmar - Myanmar is ranked 7th out of 190 nations, meaning disaster risk to elderly citizens is very high.
TECTONICS
1.4 Disaster occurrence can be explained by the relationship between hazards, vulnerability, resilience and disaster.
Define resilience.
According to the UNISDR, the resilience of a community with respect to potential hazard events is determined by the degree to which the community has the necessary resources and is capable of organising itself both prior to and during times of need.
TECTONICS
1.4 Disaster occurrence can be explained by the relationship between hazards, vulnerability, resilience and disaster.
Why do some communities have a high capacity to cope with high resilience?
- They have emergency evacuation, rescue and relief systems in place.
- They react by helping each other, to reduce the numbers affected.
- Hazard-resistant design or land-use planning has reduced the numbers at risk.
TECTONICS
1.4 Disaster occurrence can be explained by the relationship between hazards, vulnerability, resilience and disaster.
How does age affect resilience?
Age affects resilience as children and old people suffer more. Around 66% of those over 60 live in less-developed regions, expected to rise to 79% by 2050.
TECTONICS
1.4 Disaster occurrence can be explained by the relationship between hazards, vulnerability, resilience and disaster.
How is Japan vulnerable in terms of age?
2011 tsunami killed 15,000 and 9500 injured or missing. 56% of those who died were aged 65+, although they comprised 23% of the population in the affected area
TECTONICS
1.4 Disaster occurrence can be explained by the relationship between hazards, vulnerability, resilience and disaster.
What is meant by risk? What does high risk mean?
- The exposure of people to a hazardous event.
- A high risk means that there is a high probability that the hazard will lead to the loss of lives/livelihood
TECTONICS
1.4 Disaster occurrence can be explained by the relationship between hazards, vulnerability, resilience and disaster.
What is the hazard risk equation?
Risk = hazard x exposure x vulnerability / manageability
TECTONICS
1.4 Disaster occurrence can be explained by the relationship between hazards, vulnerability, resilience and disaster.
How is risk understood?
- By perception, and the point when a population or community chooses to adjust.
- However, this varies by the type of hazard and attitudes of decision-makers.
- People and populations vary in terms of their resilience.
TECTONICS
1.4 Disaster occurrence can be explained by the relationship between hazards, vulnerability, resilience and disaster.
What does the PAR model suggest?
The PAR model links vulnerability to disasters as it shows how the progression of vulnerability occurs and how they lead to disasters. It shows that disasters occur when hazards affect vulnerable people. Ut shows how unsafe conditions and hazards create social vulnerability.
TECTONICS
1.4 Disaster occurrence can be explained by the relationship between hazards, vulnerability, resilience and disaster.
What had occurred in Haiti in 2010?
The 2010 Port-au-Prince earthquake in Haiti. Its magnitude of 7.0 was relatively low, but it is estimated that 160,000 people died. The PAR model can be used to help understand this.
TECTONICS
1.4 Disaster occurrence can be explained by the relationship between hazards, vulnerability, resilience and disaster.
What were some of the root causes of the disaster (Haiti 2010)?
- Per capita GDP (PPP) US $1200.
- 50% of the population is under 20 years old.
TECTONICS
1.4 Disaster occurrence can be explained by the relationship between hazards, vulnerability, resilience and disaster.
What were some of the dynamic pressures of the disaster (Haiti 2010)?
- Lack of education, training and investment
- Rapid population change and urbanisation
TECTONICS
1.4 Disaster occurrence can be explained by the relationship between hazards, vulnerability, resilience and disaster.
What were some of the unsafe conditions of the disaster (Haiti 2010)?
- 25% of people live in extreme poverty.
- 80% of Port-au-Prince’s housing is unplanned, informal slums.
TECTONICS
1.7 Understanding the complex trends and patterns for tectonic disasters helps explain differential impacts.
What are the three trends for all tectonic disasters?
- Falling death rates (120,000 in 1975 to 20,000 in 2015)
- Reported number of disasters has fallen (from 900 in 1975 to 360 in 2012)
- Number of people affected by the disasters has risen (from 55 million in 1975 to 260 million in 2015)
TECTONICS
1.7 Understanding the complex trends and patterns for tectonic disasters helps explain differential impacts.
Summarise the trends in tectonic hazards in terms of Earthquakes.
- There has been no change in the number of earthquake disasters since 1980, which varies between 15 and 40 each year.
- Earthquake deaths are very variable: there were fewer than 1000 deaths worldwide in 2012 and 2014, yet more than 200,000 in 2010 and 2004.
TECTONICS
1.7 Understanding the complex trends and patterns for tectonic disasters helps explain differential impacts.
What is the trend with regards to Earthquakes?
Overall, there are fewer earthquake deaths than there were 30-40 years ago, but the impact of single megadisasters skews the data.
TECTONICS
1.7 Understanding the complex trends and patterns for tectonic disasters helps explain differential impacts.
What is the economic trend for Earthquake economic losses?
The trend for earthquake economic losses is upwards, averaging about $20-40 billion per year but, once again, this is affected by very few large events.
TECTONICS
1.7 Understanding the complex trends and patterns for tectonic disasters helps explain differential impacts.
Why are volcanic disasters less frequent than earthquakes?
Volcanic disasters are much less frequent than earthquake ones and deaths from eruptions are now rare.