Overall Orange alert Flood for China
in China

Flood impact summary

Flood China is expected to have a medium humanitarian impact based on the magnitude and the affected population and their vulnerability.

GDACS ID: 1101029
Deaths: 0
Displaced: 80794
Region: Sichuan
Countries: China
From - To 07 Aug - 11 Aug
Known identifiers for this event:

GDACS Score

For more info on GDACS alert score click here.

Impact Assessement as of 11-08-2021

SENDAI Indicator B N Country Location Info
affected 440000 China Sichuan
displaced 80794 China Sichuan
SENDAI Indicator C N Country Location Info
houses 20 China Sichuan

Satellite Observation

Satellite-based Flood extent provided by GLOFAS
Overall of the satellite-based flooded area from / to : 2021-07-31 / 2021-09-02  

Saturday 31/07Sunday 01/08Monday 02/08Tuesday 03/08Wednesday 04/08Thursday 05/08Friday 06/08Saturday 07/08Sunday 08/08Monday 09/08Tuesday 10/08Wednesday 11/08Thursday 12/08Friday 13/08Saturday 14/08Sunday 15/08Monday 16/08Tuesday 17/08Wednesday 18/08Thursday 19/08Friday 20/08Saturday 21/08Sunday 22/08Monday 23/08Tuesday 24/08Wednesday 25/08Thursday 26/08Friday 27/08Saturday 28/08Sunday 29/08Monday 30/08Tuesday 31/08Wednesday 01/09Thursday 02/09

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 1659 displaced 13 Aug 2021 15 Aug 2021 GLOFAS
2 21 deaths and 11000 displaced 11 Aug 2021 13 Aug 2021 GLOFAS
3 0 deaths and 80794 displaced 07 Aug 2021 11 Aug 2021 GLOFAS
4 0 deaths and 300 displaced 21 Aug 2021 23 Aug 2021 GLOFAS
5 0 deaths 24 Aug 2021 26 Aug 2021 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.