Satellite detected water extent in N'Djamena City as of 26 August 2024

**UNOSAT code: FL20240820TCD** This map illustrates satellite-detected water extent in N'Djamena city, N'Djamena Department, Chad as observed from a WorldView-2 satellite image acquired on 08 October 2024. Within the analysed area of about 245 km², a total of about 34km² of lands appear to be affected by flood waters in Chad. Within the analysed area approximately 1,400 buildings (<5%) in Chad are affected by the floodwaters. According to the forecasted river flow data from ECMWF, as of 09 Oct. 2024, for the water gauges Chari A Chagoua and Chari A Ndjamena -Ex Fort-Lamy- along the river Chari, the current medium flow (Q2yr) has a tendency to decrease in the next 10 days with the peak likely happening on 10th Oct. 2024. This is a preliminary analysis and has not yet been validated in the field. Please send ground feedback to the United Nations Satellite Centre (UNOSAT).

**UNOSAT code FL20221019TCD** This map illustrates satellite-detected surface waters in N'Djamena Department, N'Djamena Region, Chad as observed from a Sentinel-2 image acquired on 20 October 2022 at 10:20 local time. Within the map extent of about 100 km2, about 42 km2 of lands appear to be flooded and 5,408 structures are potentially affected by the floods. Based on Worldpop population data and the detected surface waters, about 160,000 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 United Nations Satellite Centre (UNOSAT).

**UNOSAT code FL20221019TCD** This map illustrates satellite-detected surface waters in N'Djamena Department, N'Djamena Region, Chad as observed from a WorldView-2 image acquired on 24 October 2022 at 10:38 local time. Within the analyzed area of about 300 km2, about 38 km2 of lands appear to be flooded and 14,799 structures are potentially affected by the floods. Based on Worldpop population data and the detected surface waters, about 154,000 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 United Nations Satellite Centre (UNOSAT).

**UNOSAT code FL20221019TCD** This map illustrates satellite-detected surface waters in N'Djamena Department, N'Djamena Region, Chad as observed from a Pleiades image acquired on 21 October 2022 at 10:35 local time. Within the analyzed area of about 500 km2, about 68 km2 of lands appear to be flooded and 13,323 structures are potentially affected by the floods. Based on Worldpop population data and the detected surface waters, about 228,000 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 United Nations Satellite Centre (UNOSAT).

**UNOSAT code: FL20240820TCD, GDACS ID: 1102854** This map illustrates satellite-detected water extent in Bongor City, Mayo-Boneye Department, Mayo-Kebbi Est Region, Chad as observed from a PlanetScope satellite image acquired on 26 August 2024. Within the analysed area of about 70 km², a total of about 20km² of lands appear to be affected by flood waters. Within the analysed area approximately 1,600 buildings (<30%) in Chad are affected by the floodwaters. This is a preliminary analysis and has not yet been validated in the field. Please send ground feedback to the United Nations Satellite Centre (UNOSAT).

**UNOSAT code FL20221019TCD** This map illustrates satellite-detected surface waters in N'Djamena and Chari Departments, Chad as observed from a Kanopus-V image acquired on 30 October 2022 at 11:26  local time. Within the analyzed area of about 570 km2, about 110 km2 of lands appear to be flooded and 19,465 structures are potentially affected by the floods. Based on Worldpop population data and the detected surface waters, about 284,000 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 United Nations Satellite Centre (UNOSAT).