natural disasters: a comprehensive presentation
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Natural DisastersPresented by: Faisal Naseer,Sanaullah Khan
Definition.Categories of natural disasters.Places of occurrence.Similarities & Differences.Outline:
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.
Natural disasters of the atmosphere
Types of Meteorological DisastersHurricane, Typhoon, Cyclones.Tornadoes.Characteristics: Hard rain, flooding, high winds.Duration: 8 24 hours of full force
Cyclone, Typhoon, Tornado, Hurricane
Whats the difference??
Cyclone, Typhoon, HurricaneDefine: A tropical storm that forms over an oceanThe difference is WHERE they form
Cyclone: Asia, South of the EquatorTyphoon: Asia, North of the Equator Hurricane: Atlantic Ocean & East Coast of North America
Tropical Storm Map
Test Your KnowledgeWrite these down:What wind storm occurs in these countries:United States:Australia:India:Japan:Canada:
Wait, whats a Tornado??
Isnt that the same??
A Tornado forms over land.
Also called a Twister
Most Of them occurs in Tornado Alley in the USA
Tornadoes Occurrence WorldwideAreas Worldwide which experience the highest chance of seeing tornados. shaded orange.
Tornado AlleyTornado Alley is the area where Tornados form the most. It includes the states of: Texas, Oklahoma, Kansas, Nebraska, and South Dakota
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.
Tornados vs. Hurricanes
Natural disasters of the land
EarthquakesA sudden shaking of the ground as a result of movements of the earths tectonic plates
How do they happen?The earths surface rests on moving sheets of crust called tectonic platesThese plates move VERY slowly
How do they happen?When the plates collide, they create mountainsWhen the plates separate, they form volcanoes.
Hydrological DisastersNatural disasters of the water
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.
How do They Occur
Where do Tsunami Occur
Where do Floods occur
Lets see what they can do.
StatisticsIn 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.