Short Notes - Floods, Disaster Management, Class 8 Class 8 Notes | EduRev

Class 8 Social Science by VP Classes

Class 8 : Short Notes - Floods, Disaster Management, Class 8 Class 8 Notes | EduRev

The document Short Notes - Floods, Disaster Management, Class 8 Class 8 Notes | EduRev is a part of the Class 8 Course Class 8 Social Science by VP Classes.
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Facts that Matter

  • Floods are phenomena in which water rises above its normal level in a certain region. Due to this, areas get submerged under water. They usually occur due to excessive rainfall.
  • When a river overflows its banks and causes floods, we call it a riverine flood.
  • Causes of floods include heavy rains, melting of snow, strong tides, storms and cyclones, sediment deposition or silting of riverbeds. Other causes are blocking of river channels after landslides, change in river course and inefficient engineering design in construction of dams, embankments and canals.
  • The most flood-prone areas in India are the Ganga and the Brahmaputra basins. Other river basins in the Deccan are also flood-prone areas. The Western Monsoon period from June to September is the critical period for the occurrence of floods. Floods are an annual feature in some parts of the country.
  • In seasons of flooding, people should identify nearest safe shelters. An emergency kit containing useful objects like a first-aid kit, torch, water-proof bags, etc should be kept handy.
  • After a flood warning is issued, the radio and the TV should be constantly used for further information. Dry food, drinking water and warm clothes should be kept handy.
  • Before evacuating, authorities should be informed of the place you are going to. Power should be turned off and electrical items should be kept as high as possible.
  • During floods, boiled water should be consumed. Food should be kept covered; surroundings should be disinfected. One should stay away from water of high depths. Snakebites are common during floods.

 

Words that Matter

  • Floods. Floods are phenomena in which water rises above its normal level in a certain region.
  • Riverine Floods. Floods caused by a river overflowing its banks are called riverine floods.
  • Channel Capacity. The amount of water that a river can hold before a flood starts is known as channel capacity.
  • Sediment. This refers to the small particles of soil carried in a river which settle on the river bed, or on floodplains.
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