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A short class with Sarah and her students. The other ways are under More.
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Let's start with understanding hazards. Hazards are natural events that can cause disasters. Can anyone give an example of a natural hazard?
An earthquake is a natural hazard.
Exactly! Now, how does the presence of people impact the risk associated with this earthquake?
If there are more people, the risk is higher because more lives are at stake.
Great point! Remember, we can use the acronym HEV to encapsulate Hazard, Exposure, and Vulnerability. Who can summarize HEV?
HEV stands for Hazards, Exposure, and Vulnerability, which all contribute to disaster risk.
Perfect! Let's keep this acronym in mind.
Now, let’s evaluate risks. Imagine a stone falling from a mountain towards a tourist spot. What makes this scenario risky?
If people are near that spot, then it's very risky.
Correct! If no one is around, does that change the situation?
Yes, if it falls in the forest with no exposure, the risk is lower.
Exactly! Always consider human exposure in risk assessments.
How does the time of day influence risk? Let's take landslides as an example.
During the night, people are sleeping, so it's more dangerous.
Exactly! Daytime may offer less risk since many individuals are outside. What other factors might we need to consider in urban settings?
If the area is densely populated, the potential impact could be much higher.
That's correct! Context matters significantly.
Hazards roam, people fall, up goes the risk for us all.
Imagine a town on a rainy night, a rock tumbles down, what a fright! If no one’s there, the risk is low, but if they are, to safety they must go.
Remember HEV: Hazards Encounter Vulnerability!
HEV: Hazards, Exposure, Vulnerability.
Term
What does hazard mean?
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Term
What increases disaster risk?
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A natural event that has the potential to cause harm or damage.
The presence of people, property, and infrastructure that could be affected by a hazard.
The susceptibility of a community to the harmful effects of hazards.
The potential losses resulting from the interaction of hazards, exposure, and vulnerability.
This section explores key components of disaster risk, namely hazards, exposure, and vulnerability, and presents scenarios to evaluate these elements.
The section discusses the interplay between hazards, exposure, and vulnerability in assessing disaster risk. Through various scenarios, it highlights how physical placement, timing, and human presence influence the risk levels associated with natural hazards like landslides and avalanches.
In this section, we delve into disaster risk evaluation, focusing on three critical components: hazard, exposure, and vulnerability. The chapter begins with the introduction of a scenario in Roorkee, Uttarakhand, prompting questions about perceived risks associated with a falling stone near a tourist area. The discussion transitions through various situations: one with a single individual present, another with potential rainfall, and the implications of human presence on risk assessment are examined.
Further, the text discusses the concept of risk in the context of natural phenomena such as avalanches and landslides, particularly in populated areas. It distinguishes between risks occurring in remote locations versus those in urban settings, emphasizing that nighttime events may pose greater risks due to sleep disturbances compared to daytime occurrences when individuals may be outside the home. This section effectively illustrates how different contextual variables can significantly modify risk assessment processes, underscoring the importance of considering all aspects of disaster scenarios.