CENTRAL AFRICAN REPUBLIC A? Flood Ouaka and Basse-Kotto Prefectures Imagery analysis: 5 November 2019 | Published on 7 November 2019 | Version 1.0 FL20191028CAF
20?24'0"E 20?26'0"E 20?28'0"E 20?30'0"E 20?32'0"E 20?34'0"E 20?36'0"E 20?38'0"E 20?40'0"E 20?42'0"E 20?44'0"E 20?46'0"E 20?48'0"E N N " " 0 0 ' ' 0 0 4 4 ? ? 4 4
C E N T R A L A F R I C A N R E P U B L I C
Bangui Gbakode N N " " 0 0 ' \! ' 8 8 3 3 ? Map location ? 4 4 K O U A N G O O U A K A Ngopo Satellite-detected water extents, as Lema N N " of 5 November 2019 over Ouaka and " 0 0 ' ' 6 6 3 3 ? ? 4 Basse-Kotto Prefectures 4 of the Central African Republic Boroma 2 Boroma 1 This map illustrates satellite-detected surface water in Ouaka and Basse-Kotto Prefectures Bwambonu N N " " 0 0 ' ' 4 4 3 of the Central African Republic, as observed 3 ? ? 4 from Sentinel-1 imagery acquired on 5 C E N T R A L A F R I C A N R E P U B L I C 4
November 2019. Within the analysed extent of Mbada about 970 km2, a total about 9 km2 of land Z A N G B A B A S S E K O T T O appear to be flooded. This is a preliminary N N " " 0 0 ' ' 2 analysis and has not yet been validated in the 2 3 3 ? ? 4 field. Please send ground feedback to UNITAR - 4 UNOSAT. Gbangoranga 1 Gbangoranga 2 Important note: Flood analysis with Sentinel-1 N N
imagery may notably underestimate the pres- " " 0 0 ' ' 0 0 3 3 ? ence of standing water in built up areas due to Gabaga ? 4 4 backscattering of the radar signal.
Legend )" N
Village N "
Oda " 0 0 ' U '
8 E Q U A T E U R 8 2 2 ? Road b ? 4 a 4 International boundary n g Prefecture boundary i N O R D - U B A N G I Ngoro Gbandjoumbou Analysis extent N N " LouKou Yehou " 0
Reference water 0 ' ' 6 6 2 2 ? Gbandjoumba Mongbanga ? 4 Satellite-detected water [5 November 2019] Ouza 1 4
Flood Population Gbandjou-Nguema Total Sub-Prefecture Prefecture Sub-Prefecture Extent Potentially Area in AOI (km2) Tima-Rive (km2) Exposed Ouaka Kouango 200 3 60 Bango Basse-Kotto Zangba 770 6 190 N N " " 0 0 ' Total '
970 9 250 4 4 2 2 ?
G B A D O L I T E ( C I T Y ) ? 4 4 Source: Esri, DigitalGlobe, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS, AeroGRID, IGN, and the GIS User Map Scale for A3: 1:150,000 Community I! Km 0 0.5 1 2 3 4 5 20?24'0"E 20?26'0"E 20?28'0"E 20?30'0"E 20?32'0"E 20?34'0"E 20?36'0"E 20?38'0"E 20?40'0"E 20?42'0"E 20?44'0"E 20?46'0"E 20?48'0"E Analysis conducted with SNAP v7.0 and ArcGIS v10.7 Satellite Data (Post): Sentinel-1 Satellite Data (Pre): Sentinel-1 Boundary data: OCHA Central African Republic, 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: 5 November 2019 Imagery Dates: 12 October 2019 Population data: WorldPop [2019] 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 34N 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 [2019] Copyright: Contains modified Copernicus Sentinel data [2019] Analysis : UNITAR - UNOSAT 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 Production: UNITAR - UNOSAT Units: Meter 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