Understanding Natural Hazards and Their Impact on Society
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?
