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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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