South Asian Flash Flood Guidance System

  • IASbaba
  • October 27, 2020
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South Asian Flash Flood Guidance System

Part of: GS Prelims and GS-I – Natural disasters & GS-III – Science and Technology 

In news

  • Recently, the India Meteorological Department (IMD) has launched the South Asian Flash Flood Guidance System (FFGS). 
  • Aim: To help disaster management teams and governments make timely evacuation plans ahead of the actual event of flooding.

Key takeaways 

  • A dedicated FFGS centre will be established in New Delhi. 
  • Weather modelling and analysis of rainfall data observations from member countries will be done there.
  • Developed by: US-based Hydrologic Research Centre 
  • Based on the rainfall and potential flooding scenario, flash flood warnings will be issued to respective nations.
  • Flash flood threat warning will be issued six hours in advance. 
  • Flood risk warning will be issued 24 hours in advance. 
  • Warnings about watershed level will be issued 12 hours in advance.

Important value additions 

Flash Floods

  • These are sudden surges in water levels during or following an intense spell of rain.
  • These are localised events of short duration. 
  • The peak is usually very high. 
  • The duration is less than six hours between the occurrence of the rainfall and peak flood.
  • The flood situation worsens if the drainage lines are choked or the natural flow of water is obstructed.

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