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A short class with Sarah and her students. The other ways are under More.
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Today, we’ll discuss the components of disaster risk: hazard, exposure, and vulnerability. Can anyone tell me what these components mean?
I think a hazard is something dangerous, like a landslide, right?
Exactly! A hazard is a dangerous event or phenomenon. Now, how about exposure?
Exposure is when people are at risk from that hazard, like being near the landslide?
Great job! And vulnerability? Any thoughts?
It might be how likely someone is to get hurt based on their situation?
Correct! Vulnerability refers to the susceptibility of people or communities to be harmed. Remember these three components: 'HEV' — Hazards, Exposure, Vulnerability!
Can we also talk about how time affects these components?
Sure! Time of day can significantly influence risk perception.
How does the time of day affect our perception of risk?
I think nighttime feels riskier because people are usually sleeping.
But during the day, people might be outside and not as exposed, right?
Exactly! During nighttime, the risk might be higher because people are less aware. We have to consider how being awake during the day might lower exposure.
So, a landslide at night is riskier than in the day?
Yes, that makes a significant difference! Always consider the context when assessing risks.
Now, let’s discuss the context. Why does a landslide in a populated area feel riskier than one in a remote area?
Because more people live there, and they are more likely to be affected!
Exactly! The higher the population density, the more vulnerable they are to hazards. Can anyone think of how urbanization affects disaster risks?
In cities, there are more structures to be damaged, increasing the vulnerability!
Great point! Urban settings can amplify disaster risks due to the complexity of human activities.
At night we sleep, risks may creep; in day we play, fewer dismay.
Imagine a quiet village at night when a sudden landslide occurs, illustrating the dangers of nighttime disasters.
Use H-E-V to remember Hazard, Exposure, Vulnerability.
N.V.E. for Nighttime Vulnerable Exposure.
Term
What are the three components of disaster risk?
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Term
Why is nighttime considered riskier for disasters?
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A potential source of harm or adverse effect.
The condition of being subjected to a hazardous event.
The degree to which people or communities are susceptible to adverse effects from hazards.
The subjective judgment people make about the characteristics and severity of a risk.
This section discusses how time of day affects risk perception in disaster scenarios, emphasizing the increased risks associated with nighttime events.
The section examines the relationship between time of day and disaster risk perception, illustrating through examples how the presence of people during different times affects risk assessments. It highlights the nuances in risk evaluation based on context and human exposure.
In the lecture by Prof. Subhajyoti Samaddar from Kyoto University, the significant factors of disaster risk are explored. These factors include hazard, exposure, and vulnerability, key elements that determine the overall risk. One critical aspect presented is how the perception of risk varies depending on the time of day. For example, a landslide occurring at night can pose greater risks due to people sleeping, while the same landslide during the day might coincide with fewer people being exposed in urban areas. The discussion emphasizes that understanding when potential disasters might occur can guide better disaster management and preparedness strategies.