CAMEROON AND CHAD Flood Far-North, Cameroon and Chari-Baguirmi, Hadjer-Lamis and N'Djamena, Chad FL20200826TCD Imagery analysis: 9 September 2020 | Published 11 September 2020 | Version 1.0 14?57'0"E 15?0'0"E 15?3'0"E 15?6'0"E 15?9'0"E N N " " 0 0 ' ' 9 9 ? ? 2 2 C H A D 1 1 Ndjamena Map location Satellite detected water extents as of 9 September 2020 in Far-North, Cameroon and Chari-Baguirmi, Hadjer-Lamis and N'Djamena, Chad This map illustrates satellite-detected surface waters over Far-North region of Cameroon and Chari-Baguirmi, Hadjer-Lamis and N'Djamena regions of Chad as observed from Sentinel-1 N N " " 0 0 ' image acquired on 9 Sep 2020. Within the ' 6 6 ? ? 2 2 1 analyzed area of about 800 km2, a total of about 1 30 km2 of lands appear to be flooded. Based on Worldpop population data and the detected surface waters, about 28,000 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. Legend City/Town N N " " 0 0 ' ' 3 Airport 3 ? ? 2 2 1 1 Primary road Secondary road International boundary Region boundary Reference water Population Total District Total Population Flood Extent Potentially Satellite detected water [9 September 2020] Country Region District Area in AOI Population in Potentially (km2) Exposed (km2) AOI Exposed (%) Satellite detected water [5 September 2020] Cameroon Far-North Logone-et-Chari 259 11 86,750 2 ,000 2% Chari-Baguirmi Chari 157 5 27,550 600 2% Chad Hadjer-Lamis Haraze-Al-Biar 5 <1 700 20 3% Map Scale for A3: 1:80,000 N'Djamena N'Djam?na 414 12 1 ,407,150 25,570 2% Total 835 2 8 1 ,522,150 28,190 2% km 0 0.5 1 2 3 4 14?57'0"E 15?0'0"E 15?3'0"E 15?6'0"E 15?9'0"E Analysis conducted with ArcGIS v10.7 Satellite Data (Post) : Sentinel-1 Satellite Data (Pre): Sentinel-2 Administrative boundaries: OCHA Chad and OCHA Cameroon, HDX The depiction and use of boundaries, geographic names and related data shown here are not warranted to be error-free nor do they imply Imagery Dates: 9 September 2020 Imagery Dates: 13 May 2020 Population data: WorldPop [2020] official endorsement or acceptance by the United Nations. UNOSAT is a program of the United Nations Institute for Training and Research Coordinate System: WGS 1984 UTM Zone 33N Resolution: 10 m Resolution: 10 m Road data: OpenStreetMap (UNITAR), providing satellite imagery and related geographic information, research and analysis to UN humanitarian & development Projection: Transverse Mercator Copyright: Contains modified Copernicus Sentinel data [2020] Copyright: Contains modified Copernicus Sentinel data [2020] Background: BING Basemap agencies & their implementing partners. This work by UNITAR-UNOSAT is licensed under a CC BY-NC 3.0. Datum: WGS 1984 Source: ESA Source: ESA Analysis : UNITAR - UNOSAT Units: Meter Production: UNITAR - UNOSAT UNITAR - UNOSAT - Palais des Nations CH-1211 Geneva 10, Switzerland - T: +41 22 767 4020 (UNOSAT Operations) - Hotline 24/7: +41 75 411 4998 - [email protected] - www.unitar.org/unosat.