Natural Disasters: A comprehensive Presentation
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Transcript of Natural Disasters: A comprehensive Presentation
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Natural DisastersPresented by: Faisal Naseer, Sanaullah Khan
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● Definition.● Categories of natural disasters.● Places of occurrence.● Similarities & Differences.
Outline:
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What is a Natural Disaster?
• A natural disaster is an event caused by natural forces of nature that has a large effect on the human population.
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MeteorologicalNatural disasters of the atmosphere
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Types of Meteorological Disasters
• Hurricane, Typhoon, Cyclones.
• Tornadoes.
• Characteristics: Hard rain, flooding,
high winds.
• Duration: 8 – 24 hours of full force
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Cyclone, Typhoon, Tornado, Hurricane…
What’s the difference??
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Cyclone, Typhoon, Hurricane
• Define: A tropical storm that forms over an ocean
• The difference is WHERE they form
• Cyclone: Asia, South of the Equator
• Typhoon: Asia, North of the Equator
• Hurricane: Atlantic Ocean & East Coast of North America
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Tropical Storm Map
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Test Your Knowledge• Write these down:
• What wind storm occurs in these countries:
• United States:
• Australia:
• India:
• Japan:
• Canada:
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Wait, what’s a Tornado??
Isn’t that the same??
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Tornado
A Tornado forms over land.
Also called a Twister
Most Of them occurs in “Tornado Alley” in the USA
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Tornadoes Occurrence Worldwide
Areas Worldwide which experience the highest chance of seeing tornados. shaded orange.
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Tornado Alley“Tornado Alley” is the area where Tornados form the most.
It includes the states of:
Texas, Oklahoma, Kansas, Nebraska, and South Dakota
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How and why do they occur?
The middle states are located between the warm air of the Gulf of Mexico and the cold air of the Pacific Ocean from Canada.
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Tornados vs. Hurricanes
Tornado Hurricanes
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Geological Disasters
Natural disasters of the land
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Earthquake?
What’s that??
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Earthquakes
A sudden shaking of the ground as a result of movements of the
earth’s tectonic plates
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How do they happen?• The earth’s surface rests on moving
sheets of crust called tectonic plates
• These plates move VERY slowly
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How do they happen?• When the plates collide, they create
mountains
• When the plates separate, they form volcanoes.
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Hydrological DisastersNatural disasters of the water
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Types of Meteorological Disasters
• Tsunami.A long, high sea wave caused by an earthquake or other disturbance.
• Floods.An overflow of water beyond its normal limits, especially over what is normally dry.
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How do They OccurTSUNAMI
FLOODS
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Where do Tsunami Occur
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Where do Floods occur
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Let’s see what they can do.
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video
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Statistics● In 2012, there were 905 natural catastrophes worldwide.
● 93% of which were weather-related disasters.
● 45% were meteorological (storms)
● 36% were hydrological (floods)
● 12% were climatological (heat waves, cold waves, droughts, wildfires)
● 7 % were geophysical events (earthquakes and volcanic eruptions).
● Between 1980 and 2011 geophysical events accounted for 14% of all natural catastrophes.
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