Natural disaster

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Question time!When strong hurricane hits in an uninhab-ited area in Africa ,is it by any chance con-sidered as a natural disaster?

Answer : NO! relax people ,that is merely just a natural hazard (:

So what is nature disaster? It is when natural hazard .(e.g.

floods, volcanic eruptions, earth-quakes, tsunamis, avalanches etc. ) affects the environment ,leading to financial and human losses.

Epidemics caused by bacteria or viruses are considered natural disasters. Ex : swine flu .

What causes nature disas-ter?

disasters occur when hazards meet vulnerability.

The root causes of many natural dis-asters are mainly:

soil erosionseismic activity andgreen house effect

Causes Seismic Activity: Seismic activity

is the most common cause of Tsunamis. During an earthquake, the sea floor becomes deformed, forcing a displacement of water.

Soil erosion :Soil is naturally removed by the action of water or wind, Leading to land-slides.

Green house effect : greenhouse gases(CO2 , CFC etc.) make the Earth warmer by trapping the heat energy in the atmosphere ,causing icebergs to melt. More lands will be flooded as the sea level increases.

Two categories of natural disasters(1) Hydrometeorological  Hazards which are natural pro-cesses or phenomena of atmo-spheric, hydrological or oceanographic nature. (These include flood, debris and mud-flows, tropical cyclones, storm surges, wind, rain and other severe storms.)

2) Geological Hazards   are natural phenomena that in-

clude processes of endogenous origin or tectonic or exogenous origin, such as mass movements.( These include earthquakes, tsunamis, volcanic activity and landslides etc .)

Volcano A volcano is an opening, or rupture

in a planet's surface or crust, which allows hot magma, ash and gases to escape from below the surface.

effects:   Volcanic ashesblastLavaGas

Tsunami Tsunami :tsunamis are some

of the most devastating natu-ral disasters known to man.

effects :Destruction of buildingsFinancial lossesDeath Spread of disease

Hurricaneis a storm system character-

ized by a large low-pressure center and numerous thun-derstorms that produce strong winds and heavy rain.

effectsSpread of diseaseDestruction of buildingsFinancial lossesDeath

Ten deadliest natural disas-ter

AFTER 19201.JAPAN ,1923   A third of Tokyo is destroyed and much of Yokohama in an

8.3 earthquake which between 140,000 and 200,000 peo-ple.

 2.CHINA , 1931  Flood on the Changjiang River took at least 145,000 people

(other estimates go over a million, but we have not con-firmed that).

  3.CHINA , 1935  Yellow River flood "caused 27 counties inundated and 3.4

million victims".  how much is the actual figure of victims , is still not confirmed.

 

4.CHILE , 1939 28000 people were killed from 8.3

earthquake . 5.CHINA ,1942 - 1943  A drought in the Henan province

took more than a million people 's life.

 6.WORLD WIDE , 1957  At least a hundred thousand peple

died from Asian flu .

7.AFRICA , 1981 - 1984  Rivers and lakes dried up from the drought that had in-

credible impact on twenty African nations. During one season about 20,000 were starving to death EACH MONTH.  150 million were facing starvation .

 8.NORTH KOREA , 1995-1998 Over 3 million are said to have died from famine and

floods in North Korea. 9.12 SOUTH ASIAN NATIONS , 2004-2005  Earthquake of 9.0 and the resulting tsunami creates one

of the world's worst disasters.  It does major damage to: Indonesia, India, Sri Lanka, Thailand, Malaysia, Myanmar, the Maldives, Somalia, Tanzania, Seychelles, Bangladesh, and Andaman.  Deaths: Between 235,000 and 285,000.

 

10.HAITI , 2010 Earthquake - still counting. Most

estimates now exceed 100,000 dead.

How to prevent nature disaster?There IS no way to prevent natural disasters.

they HAPPEN. Earthquakes, for instance, The best prevention we can do about global

warming is to use our natural resources carefully and judiciously, build our homes and other structures the best we can, to withstand as much as possible, and stop be-ing so arrogant as to think we have more power than NATURE. And do recycling !

SAVE OUR MOTHER EARTH

Links http://en.wikipedia.org http://

en.wikipedia.org/wiki/Hurricanehttp://

library.thinkquest.org/17457/volcanoes/effects.php

T.Q