Overall Green alert Flood for Sri Lanka
in Sri Lanka

Flood impact summary

Flood Sri Lanka is expected to have a low humanitarian impact based on the magnitude and the affected population and their vulnerability.

GDACS ID: 1101416
Deaths: 0
Displaced: 209
Region: Sri Lanka, Kolonna, Ratnapura
Countries: Sri Lanka
From - To 13 May - 15 May
Known identifiers for this event:

GDACS Score

For more info on GDACS alert score click here.

Impact Assessement as of 16-05-2022

SENDAI Indicator B N Country Location Info
affected 7337 Sri Lanka Sri Lanka
displaced 209 Sri Lanka Ratnapura
injured 1 Sri Lanka Kolonna
SENDAI Indicator C N Country Location Info
houses damaged 203 Sri Lanka Sri Lanka

Satellite Observation

Satellite-based Flood extent provided by GLOFAS
Overall of the satellite-based flooded area from / to : 2022-05-06 / 2022-05-22  

Friday 06/05Saturday 07/05Sunday 08/05Monday 09/05Tuesday 10/05Wednesday 11/05Thursday 12/05Friday 13/05Saturday 14/05Sunday 15/05Monday 16/05Tuesday 17/05Wednesday 18/05Thursday 19/05Friday 20/05Saturday 21/05Sunday 22/05

Timeline of revisions

For accessing reports of previous advisories, please click on the advisory number in the table below.

IDAlert ColorPopulation affectedStart DateEnd DateSource
1 0 deaths and 209 displaced 13 May 2022 15 May 2022 GLOFAS

Flood polygons

This polygon (translucent blue with a blue border) is drawn by the analysts recording the flood event. It is meant to include all the areas reported as affected, by official source or the media. It does not represent the area actually under water.

Microwave flood detection

Flooded area, as detected in microwaves by the Global Flood Detection System of the JRC, based on NASA TRMM/GPM observations. This system has a rather low resolution (of 5-10km) but is not affected by clouds.
For more details, see http://www.unisdr.org/files/9622_LBNA23303ENC002.pdf.
The areas with a flood signal along the coast are an artefact of the system and should not be considered.

Optical Flood detection

Flooded area as detected in optical wavelengths by NASA/MODIS, known as "MODIS Flood Product". Data are made available by NASA GSFC Flood Mapping Project, http://oas.gsfc.nasa.gov/floodmap/index.html. Resolution of 250m, heavily affected by cloud cover.