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Changing Flood Water Levels in Agadez Region, Niger
09 Sep 2009
 Source: UNOSAT

Background

•  South East Asia Monsoon

•  W. African floods

•  Floods

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Niger - This map illustrates satellite-detected changes in the flood water levels in the Agadez Region of Niger, as based on change detection methods using MODIS Aqua data acquired over the area on 3, 5 & 7 September and 11 August 2009. There are 3 water classes identified in the map: where waters have increased (red), decreased (green) and remained static (yellow) from 3 to 7 September. The majority of water in the area has receded rapidly, however there is some minor new water flow to the north. The newly released ASTER global elevation model (GDEM) was also used in this analysis. This is a preliminary analysis & has not yet been validated in the field. Map scale for A3: Projection: UTM Zone 32 North; Datum : WGS-84 (EGM-96).
Satellite Data (1) : MODIS Aqua
Imagery Dates : 3-7 Sept. & 11 August 2009
Resolution : 250 m
Source : NASA
Elevation Data : ASTER GDEM & SRTM
Resolution : 27m / 90m
Source : METI & NASA 2009
Road Data : Google Map Maker 2009
Other Data : WDPA, USGS, NGA
Flood Analysis : UNITAR / UNOSAT
Map Production : UNITAR / UNOSAT



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Source:UNOSAT
Country:Niger
Link to high-Res:File size: 4.666 MB
Link to mid-Res:File size: 1.316 MB
KML: Link to KML file


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Last updated:Mon Nov 23 20:59:39 2009