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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 talk about hazards. Can anyone tell me what we mean by a 'hazard'?
Isn't a hazard something that can cause damage or danger?
Correct! A hazard is a potentially damaging physical event or phenomenon that may cause loss of life or property. Think of the acronym P-D-L—'Potential Damage Loss.' Let's explore further!
What are some examples of hazards?
Great question! Examples include floods, landslides, earthquakes, and tropical storms. They can be natural or human-induced.
And how does it relate to risk?
Risk is evaluated based on the hazard, exposure, and vulnerability levels in a particular area. More on that later!
So more exposure means more risk?
Exactly! Higher population density or economic vulnerability increases risk levels. Recap: remember P-D-L for hazards!
Let’s categorize natural hazards. Who can name some types?
I think geological hazards are one type!
Correct! Geological hazards include earthquakes and landslides. Now, what about hydro-meteorological hazards?
Those would be things like floods and storms, right?
Yes! Hydro-meteorological hazards include floods, droughts, and severe storms. Remember the acronym H-M-H for Hydro-Meteorological Hazards.
What causes these hazards?
They can be triggered by phenomena like heavy rainfall, temperature extremes, and even human activity. Recap: H-M-H includes all weather-related events.
Now, let’s examine how hazards affect different regions. What do you think affects a region's risk?
Is it their income level or infrastructure?
Exactly! Low-income countries often face greater risks during disasters compared to wealthier nations. This is due to their lack of resources.
Does that mean they have more disasters like floods?
Yes, and studies show that floods are among the most reported disasters globally. Always remember, the poorer the community, the higher the risk.
What characteristics should we consider about hazards?
Important characteristics include frequency, duration, and extent. A hazard that strikes frequently can have a compounding effect on a community.
Got it! Frequency is how often, right?
Exactly! And duration refers to how long it lasts. Recap: Remember F-D-E—'Frequency, Duration, Extent.'
Potentially damaging physical events causing loss.
Combination of hazard, exposure, and vulnerability.
Weather-related hazards like floods.
Susceptibility of areas to hazards.
Interaction level between hazards and communities.
A hazard's a chance to cause a big fright, with loss of life possibly in sight.
Imagine a town where heavy rain turns to flood. The people there are vulnerable, lacking good food. Urban areas face the most risk, where density is rife, showing us disaster’s harsh grip on life.
Remember H-M-H for Hydro-Meteorological Hazards—floods and storms, strong like are!
P-D-L: Potential Damage Loss to remember what hazards can do.
Term
What is a hazard?
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Term
What does risk consist of?
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Term
Examples of hydro-meteorological hazards?
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What is vulnerability?
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A potentially damaging physical event or phenomenon that may cause loss and injury.
The interaction between hazard, vulnerability, and exposure.
Hazards related to weather and water events, including floods and storms.
The susceptibility of a community or individual to be harmed by a hazard.
The level of interaction between a community and a hazard.
This section discusses hydro-meteorological hazards, their definitions, types, and the implications of risk factors such as vulnerability and exposure.
The section elaborates on hydro-meteorological hazards, distinguishing them from geological and biological hazards, while exploring their origins and characteristics. It delves into risk components—hazard, exposure, and vulnerability—and provides examples of various hydro-meteorological events.
Hydro-meteorological hazards are dangerous events stemming from climate and weather phenomena that have the potential for significant damage, including loss of life, property, and environmental deterioration. This section defines hazards as potentially damaging physical events, whether naturally occurring or human-induced, and stresses their potential to cause a variety of disruptions.
Types of Hazards: The section categorizes natural hazards into different types based on their origins, particularly highlighting hydro-meteorological hazards which include floods, debris flows, tropical cyclones, and severe storms. It outlines how various factors such as heavy rainfall, drought, and temperature extremes play a role in these hazards.
Risk Assessment: A significant part of understanding hydro-meteorological hazards is evaluating the risk associated with them. Risk is defined by the interaction of hazard, exposure, and vulnerability—the more densely populated or economically disadvantaged a region, the higher the risk when such hazards occur. The section also presents statistical evidence illustrating the disproportionate impact of these disasters on low-income countries compared to wealthier nations. Essential characteristics of hazards including frequency, duration, and extent are outlined, providing a framework for disaster risk management.