Product ID: 3172 - English
Published: 10 Nov, 2020
GLIDE: TC20201028VNM


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This map illustrates satellite-detected surface waters in Nghe An Province of Viet Nam as observed from a Sentinel-1 image acquired on 9 November 2020 at 05:51 local time. Within the analyzed area of about 15,000 km2, a total of about 40 km2 of lands appear to be flooded. The water extent appears to have receded of about 360 km2 since 31 October 2020. Based on Worldpop population data and the detected surface waters, about 23,000 people are potentially exposed or living close to flooded areas.
This is a preliminary analysis and has not yet been validated in the field. Please send ground feedback to UNITAR-UNOSAT.
Important Note: Flood analysis from radar images may underestimate the presence of standing waters in built-up areas and densely vegetated areas due to backscattering properties of the radar signal.
Satellite Data (1) : Sentinel-1
Imagery Date : 8 November 2020
Acquisition time :22:51 UTC
Resolution: 10 m
Copyright : Contain modified Copernicus Sentinel Data [2020]
Source : ESA
Satellite Data (2) : Radarsat Constellation 1
Imagery Date: 31 October 2020
Acquisition time : 10:56 UTC
Resolution: 12.5 m
Copyright: RADARSAT Constellation Mission Imagery, Government of Canada (2020)
Administrative boundaries: OCHA ROAP
Population data: WorldPop [2020]
Reference Water : The European Commission's Joint Research Centre Road : Open Street Map
Background : ALOS Global DSM
Analysis: UNITAR-UNOSAT
Production: UNITAR-UNOSAT