UNOSAT maps over Bangladesh for a period of 5 years
Updated: 7 hours 3 min ago
Tue, 10/29/2013 - 19:25
This map illustrates satellite-detected areas of standing flood waters and flood affected land over the districts of Satkhira, Khulna, and Jessore, in Khulna Division, Bangladesh, extracted from MODIS Terra data acquired on 11 October 2013. MODIS Aqua data acquired on 21 October 2012 and MODIS Terra data acquired on 10 October 2011 was also analyzed to allow comparison with seasonal flooding seen in 2011 and 2012. Standing waters seen on the 11 October 2013 appear to cover a slightly larger area than standing water seen on 11 October 2011 and the 21 October 2012. However it is unknown whether the water detected in these images was increasing, peaking, or receding. Water detected in the 2011 and 2012 image may show the waters as they were receding. Both the 2011 and 2013 images were affected by clouds along the coast, to the north, and to the east of the area of interest. Notes: The exact limit of flood waters is uncertain because of the low spatial resolution of the satellite data used for this analysis. Only waters with an area of at least 250 square meters were likely detected in this analysis and thus many smaller water bodies were not visible. Detected water bodies therefore reflect an underestimation of all flood-affected areas within the map extent. It is likely that flood waters have been systematically underestimated in highly vegetated areas. This analysis has not yet been validated in the field. Please send ground feedback to UNITAR /UNOSAT
Fri, 05/17/2013 - 18:39
This map represents satellite-detected areas of standing water around the town of Uttar Nalbila in the division if Chittagong (Bangladesh) in the south-east of Bangladesh as detected by Radarsat-2 imagery collected the 16th of May 2013. Water signatures detected are mainly around the coastal areas and appear to be focused primarily in areas of agriculture/aquaculture. No major floods have been detected close to the main cities. This is a preliminary analysis & has not yet been validated in the field. Please send ground feedback to UNITAR /UNOSAT.