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Madagascar: Satellite Detected Waters Extent in Mananjary District, Vatovavy-Fitovinany Region

This map illustrates satellite-detected water extent as of 07 January 2018 over Mananjary district, Vatovavy-Fitovinany region, in Madagascar as detected by Sentinel-1. ~ 1000 ha of land over the communes of Tsiatosika and ~1300 ha in Ankatafana seem to be inundated. These zones are mainly agricultural and/or swamps. These waters are the results of recent heavy rains following the cyclone AVA-18 which made landfall the 05 January 2018. It is likely that flood waters have been systematically underestimated along highly vegetated areas along main river banks and within built-up urban areas, due to the special characteristics of the satellite data used. This is a preliminary analysis and has not yet been validated in the field. Please send ground feedback to UNITAR-UNOSAT.

United Nations Operational Satellite Applications Programme
Original Publication Date: 
09 Jan 2018
Map/Infographic Type: 
Natural Disasters
Natural Disasters
Tropical Cyclone Ava - Jan 2018