Product ID: 3564 - English
Published: 21 Jun, 2022
GLIDE: FL20220525BGD

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This map illustrates satellite-detected surface waters and impact in Sylhet and Sunamganj Districts, Sylhet Division, Bangladesh as observed from a RCM-1 image acquired on 18 Jun 2022 at 17:54 local time.
Within the analyzed area of about 1,325 km2, about 840 km2 of lands appear to be flooded. In this area, about 140 km of roads and 1 km of railway appear to be likely affected by the flood waters. Based on Worldpop population data and the detected surface waters, about 839,000 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 United Nations Satellite Centre (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.
Spatial Reference
Name: WGS 1984 UTM Zone 46N
PCS: WGS 1984 UTM Zone 46N
Datum: WGS 1984
Projection: Transverse MercatorSatellite Data : RCM-1
Imagery Dates: 18 Jun. 2022 at 11:54 UTC
Resolution: 3 m
Copyright: RADARSAT Constellation Mission Imagery © Government of Canada
Source: CSA / RCM-1
Administrative boundaries: : Bangladesh Bureau of Statistics (BBS)
Population data: WorldPop [2020]
Populated place: OpenStreetMap
Road data: OpenStreetMap
Waterways: OpenStreetMap
Affected facilities: The Detailed database developed under CDMP Project of the
Ministry of Disaster Management and Relief.
Reference Water: ESA WorldCover
Copyright: © ESA WorldCover project 2020 / Contains modified Copernicus
Sentinel data (2020) processed by ESA WorldCover consortium
Background: ESRI World Imagery
Analysis: United Nations Satellite Centre (UNOSAT)
Production: United Nations Satellite Centre (UNOSAT)