Natural Hazards and Their Impact on Society
Map Your Hazards!
Combining Natural Hazards with Societal Issues
Introduction to Natural Hazards
What is a Natural Hazard?
•
A naturally occurring event that
could
harm us
directly or indirectly.
What are some examples of
natural hazards?
What Causes Natural Hazards?
•
Nature
What are some examples of
natural processes that
cause natural hazards?
What Causes Natural Hazards?
Natural Process
•
Movement and melting of
tectonic plates
•
Movement of water
through atmosphere, land
and oceans
•
Movement of rocks and soil
through weathering and
erosion
Natural Hazard
•
Flooding
•
Sinkholes
•
Droughts
•
Earthquakes
•
Volcanoes
•
Tsunamis
•
Landslides
Match natural processes with natural hazards
they cause (multiple answers possible)
When Do Natural Hazards Become
Natural Disasters?
•
When a naturally occurring event significantly
harms us directly or indirectly
Joplin tornado, EF-5, May 2011
When Do Natural Hazards Become
Natural Disasters?
•
A massive avalanche in the Alaskan interior
–
0 deaths
–
$0 in property damage
Natural
disaster or
not?
Southeastern Alaskan landslide, 2010
When Do Natural Hazards Become
Natural Disasters?
•
Khait or Hoit landslide occurred on July 10, 1949,
in Tajikistan (formerly part of the Soviet Union)
•
The landslide was triggered by an earthquake
•
33 villages were buried, killing 28,000 people
Natural
disaster or
not?
Village of Khait and Khait landslide, 1949
Can We Affect Natural Hazards?
•
How are we connected to the frequency and
occurrence of hazards?
•
How are we connected to the magnitude of
natural disasters?
•
How do we positively and negatively affect our
environment?
What Can We Do about Natural
Hazards?
•
Natural Hazard Mitigation
is
action taken to reduce or
eliminate negative impacts of
a natural hazard
–
Pre-event (anticipatory)
–
Post-event (reactive)
What are some examples of
pre-event and post-event mitigation?
Volunteers assist Hurricane
Katrina victims at the Houston
Astrodome.
What is Natural Hazard Mitigation?
Pre-event (anticipatory)
•
Land-use planning
•
Insurance
•
Evacuation
•
Disaster preparedness
•
Artificial control of natural
processes
•
Etc.
Post-event (reactive)
•
Homeless shelters
•
Emergency food, water and
medical services
•
Search and rescue efforts
•
Firefighting
•
Clean-up
•
Etc.
What would you include in a natural
hazard mitigation plan?
Explore the world of natural hazards, their causes, examples, and the transition to natural disasters. Learn how human actions can influence the frequency and severity of hazards. Discover the interconnectedness between nature and society in dealing with these events.
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Presentation Transcript
Introduction to Natural Hazards Map Your Hazards! Combining Natural Hazards with Societal Issues
What is a Natural Hazard? A naturally occurring event that could harm us directly or indirectly. What are some examples of natural hazards?
What Causes Natural Hazards? Nature What are some examples of natural processes that cause natural hazards?
What Causes Natural Hazards? Natural Process Movement and melting of tectonic plates Movement of water through atmosphere, land and oceans Movement of rocks and soil through weathering and erosion Natural Hazard Flooding Sinkholes Droughts Earthquakes Volcanoes Tsunamis Landslides Match natural processes with natural hazards they cause (multiple answers possible)
When Do Natural Hazards Become Natural Disasters? When a naturally occurring event significantly harms us directly or indirectly Joplin tornado, EF-5, May 2011
When Do Natural Hazards Become Natural Disasters? A massive avalanche in the Alaskan interior 0 deaths $0 in property damage Natural disaster or not? Southeastern Alaskan landslide, 2010
When Do Natural Hazards Become Natural Disasters? Khait or Hoit landslide occurred on July 10, 1949, in Tajikistan (formerly part of the Soviet Union) The landslide was triggered by an earthquake 33 villages were buried, killing 28,000 people Natural disaster or not? Village of Khait and Khait landslide, 1949
Can We Affect Natural Hazards? How are we connected to the frequency and occurrence of hazards? How are we connected to the magnitude of natural disasters? How do we positively and negatively affect our environment?
What Can We Do about Natural Hazards? Natural Hazard Mitigation is action taken to reduce or eliminate negative impacts of a natural hazard Pre-event (anticipatory) Post-event (reactive) Volunteers assist Hurricane Katrina victims at the Houston Astrodome. What are some examples of pre-event and post-event mitigation?
What is Natural Hazard Mitigation? Post-event (reactive) Homeless shelters Emergency food, water and medical services Search and rescue efforts Firefighting Clean-up Etc. Pre-event (anticipatory) Land-use planning Insurance Evacuation Disaster preparedness Artificial control of natural processes Etc. What would you include in a natural hazard mitigation plan?
