Write an essay in 400-450 words about a natural calamity
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A natural disaster is unforeseen, severe and immediate. Pollution, ozone depletion in the stratosphere and global warming come in this category. Natural disasters include cyclones, earthquakes, floods, drought (though these two are now being increasingly considered ‘man- made’ disasters) heat and cold waves, landslides, avalanches, flash floods, severe thunderstorms, hail, low level wind shears, and microburst.
The destructive potential of any natural hazard is estimated basically by its spatial extent and severity. Spatial extent upto which the effect of a disastrous event could be felt may easily be classified into small, medium and large scales. The phenomenon extending from a few kilometers to a few tens of kilometers are termed as small scale.
Growing industrialisation and unjustified exploitation of natural resources have brought our echo system to a verge of non-reversibility and imbalance. This has led to a threat from a set of natural hazards like pollution, global warming and ozone depletion on large or global scale.
The management aspect of disaster may be classified as: (a) early warning system; (b) rescue operations; (c) relief operations; (d) rehabilitation; and (e) long range planning. The most important is the early warning systems. Unless sufficient advance notice is available, evacuation of the population likely to be affected cannot be undertaken.
There are two aspects of early warning system. One is the availability of an effective technique to forecast the disaster with its extent and the other is effective communication of the same to the civil authority responsible for rescue operations.
In some phenomena, such as cyclones, flood, etc. the time available to respond to the hazard is of the order of a few days. Hence early warning, communication, and rescue operations are possible. But, in a few cases like flash floods, microburst, etc., the response time is of the order of few minutes only, which calls for a very fast early warning and efficient communication system.
The human-activity-induced hazards like pollution and global warming have already started showing their precursors, giving sufficient time to control and avoid these hazards by long term planning. On the contrary, in earthquakes no proven methods has yet been evolved to give any prior warning and so post-hazard mitigation is the only alternative.
Role of Communication For a developing country like India, the role of communication in disaster mitigation is extremely critical. Vast areas of the country do not have telephone/ telegraph links. These can neither be provided in a short span of time available for mitigation nor are there resources to do so.
The most effective way of dissemination of warning is Disaster Warning System (DWS) used by the IMD for issue of cyclone bulletin to the coastal areas. This could be extended to the entire earthquake/ flood prone areas. Experience has shown that it remains completely unaffected under the severest cyclonic condition. However, the system is limited to one way communication only.
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Explanation:
A natural disaster is a catastrophic/adverse event that is caused by natural processes. Each year, natural disasters affect different parts of the world in various forms. Natural disasters often result in loss of lives and money.