natural disasters

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Natural Disasters A natural disaster is event resulting from natural geologic processes of the Earth.

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  1. 1. A natural disaster is event resulting from natural geologic processes of the Earth.
  2. 2. Disaster management (or emergency management) is the creation of plans through which communities reduce vulnerability to hazards and cope with disasters. Disaster management does not avert or eliminate the threats, instead it focuses on creating plans to decrease the impact of disasters. Failure to create a plan could lead to damage to assets, human mortality, and lost revenue.
  3. 3. Prevention Mitigation Preparedness Local Emergency Planning Committees Preparedness measures Response Recovery
  4. 4. The National Disaster Management Authority is the primary government agency responsible for planning and capacity-building for disaster relief. Its emphasis is primarily on strategic risk management and mitigation, as well as developing policies and planning. A protective wall built on the shore of the coastal town of Kalpakkam, in aftermath of the 2004 Indian Ocean Earthquake.
  5. 5. India is home to an extraordinary variety of climatic regions, ranging from tropical in the south to temperate and alpine in the Himalayan north, where elevated regions receive sustained winter snowfall. The nation's climate is strongly influenced by the Himalayas and the Thar Desert.
  6. 6. Natural disasters, mostly of them related to the climate change, cause massive losses of life and property. For Example - Droughts Flash floods Cyclones Avalanches Landslides Snowstorms Earthquakes Tsunami Heatwave
  7. 7. An earthquake is the result of a sudden release of energy in the Earth's crust that creates seismic waves. At the Earth's surface, earthquakes manifest themselves by vibration, shaking and sometimes displacement of the ground. The vibrations may vary in magnitude. Rescue work after Earthquake in Nepal
  8. 8. While Drought a Man walking in his field. Drought is unusual dryness of soil, resulting in crop failure and shortage of water for other uses, caused by significantly lower rainfall than average over a prolonged period. Hot dry winds, shortage of water and low moisture in land causes Drought.
  9. 9. A flood is an overflow of water that "submerges" land from the increase volume of water within a body of water, such as a river or lake, which overflows causing the result that some of the water escapes its usual boundaries. Rescue work while flood in Uttarakhand
  10. 10. Cyclone, hurricane, and typhoon are different names for the same phenomenon, which is a cyclonic storm system that forms over the oceans. The deadliest hurricane ever was the 1970 Bhola cyclone.Cyclone Jal, India
  11. 11. An avalanche (also called a snowslide or rockslide) is a rapid flow of snow or rock down a sloping surface. Avalanches are typically triggered in a starting zone from a mechanical failure in the snowpack (slab avalanche) when the forces on the snow exceed its strength but sometimes only with gradually widening (loose snow avalanche).A powder snow avalanche in the Himalayas near Mount Everest.
  12. 12. A landslide, also known as a landslip, is a geological phenomenon that includes a wide range of ground movements Deep-seated landslide on a mountain in Sehara, Kih, Japan
  13. 13. Snowstorms are storms where large amounts of snow fall. Snow is less dense than liquid water Snowstorm, Central park, New York
  14. 14. A tornado is a violent, dangerous, rotating column of air that is in contact with both the surface of the earth and a cumulonimbus cloud or, in rare cases, the base of a cumulus cloud. It is also referred to as a twister or a cyclone, although the word cyclone is used in meteorology in a wider sense, to refer to any closed low pressure circulation.A rope tornado in its dissipating stage
  15. 15. A heat wave is a prolonged period of excessively hot weather, which may be accompanied by high humidity, especially in oceanic climate countries. A heat wave is measured relative to the usual weather in the area and relative to normal temperatures for the season. Temperature Climate Data
  16. 16. A tsunami , also known as a seismic sea wave or as a tidal wave, is a series of waves in a water body caused by the displacement of a large volume of water, generally in an ocean or a large lake. Earthquakes, volcanic eruptions and other underwater explosions (including detonations of underwater nuclear devices), landslides, glacier calving, meteorite impacts and other disturbances above or below water all have the potential to generate a tsunami. Tidal waves of Tsunami entering city, Sumatra, Indonesia
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