UN Operational Satellite Applications Programme (UNOSAT)
Last updated on August 28, 2018
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  • This map illustrates the evolution of satellite-detected surface waters in Sanamxay district, Attapeu province, as observed from the Radarsat-2 radar image acquired on 24 July 2018 and compared with a Radsarsat-2 image acquired on 10 July 2018. As of 10 July 2018, flooded areas and saturated soils were already visible, due to the heavy rains that happened previously to the collapse of the dam. As well, the reservoir controlled by the dam was full of water. As of 24 July 2018, an additional surface of 5,826 ha of inundated areas were detected, representing an increase of the surface waters of 66%, due to the collapse of the dam. At this date, the reservoir that was controlled by the dam has decreased in its size. Several villages and surrounding agricultural fields seems to be inundated. The villages of Ban Hinlat, Ban Thaseangchan, Ban Mai and Ban Samong-tai seems to be the most affected ones. It is likely that flood waters have been systematically underestimated along highly vegetated areas, along the main riverbanks and within built-up urban areas because of the special characteristics of the used satellite data. This is a preliminary analysis and has not yet been validated in the field. Please send ground feedback to UNITAR - UNOSAT.
  • This map illustrates the satellite-detected surface waters extent in Sanamxay district, Attapeu province, as observed from the Radarsat-2 radar image acquired on 24 July 2018. The previous day, the Xe-Namnoy dam collapsed, inducing flash floods along the Vang Ngao river and affecting several villages located 50 km downstream. Within the analysed area 14,692 ha of surface waters were detected after the heavy rains that happened on 22 July and as well the collapse of the dam. Several villages and surrounding agricultural fields seems to be inundated. The villages of Ban Hinlat, Ban Thaseangchan, Ban Mai and Ban Samong-tai seems to be the most affected ones. It is likely that flood waters have been systematically underestimated along highly vegetated areas, along the main riverbanks and within built-up urban areas because of the special characteristics of the used satellite data. This is a preliminary analysis and has not yet been validated in the field. Please send ground feedback to UNITAR - UNOSAT.
  • This map illustrates satellite-detected flood water extent and IDP distribtuion within the town of Belet Weyne in Belet Weyne District,Hiiran Region, Somalia. The analysis was conducted analyzing GeoEye-1 & WorldView-3 images acquired on the 30 April & 1 May 2018. As observed from the satellite image, the town of Belet Weyne is completely affected by the floods. Around 70% of the extension of the town is totally inundated, being the districts of Bulahabley, Bundaweyn, Dhagahjebis, Hilac, Hindab and Lamagalay Regional Military Based, Radar and Kutimbo completely submerged in water. The flood waters inside areas of partially flooded districts are receding. More than 110 IDP sites are located inside the town, and 50% of them are inside areas completly flooded. This is a preliminary analysis and has not yet been validated in the field. Please send ground feedback to UNITAR UNOSAT.
  • This map illustrates satellite-detected flood water extent over the district of Baardheere (Gedo Region), the districts of Saakow and Bu'aale (Middle Juba region) and the district of Diinsor (Bay region), Somalia using a Radarsat-2 image acquired on 09 May 2018. As observed from the satellite radar image, a total of 61,000 ha of land were inundated in the area of interest. By using WordPop data, we estimate that at least 100,000 people are potentially affected or living close to the potentially flood area. This correspond about 35% of the population living in the area of interest. It is likely that flood waters have been systematically underestimated along highly vegetated areas along main river banks and within built-up urban areas because of 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.
  • This map illustrates satellite-detected flood water extent within the town of Belet Weyne in Belet Weyne District,Hiiran Region, Somalia. The analysis was conducted analyzing GeoEye-1 image acquired on the 30 April 2018. As observed from the satellite image, the town of Belet Weyne is completely affected by the floods. More than 50% of the extension of the town is totally inundated, being the districts of Bulahabley, Bundaweyn, Dhagahjebis, Hilac, Hindab and Lamagalay Regional Military Based completely submerged in water. The areas of partially flooded districts present affected roads and buildings. Districts located in the north of the town are partially or completely obscured by the clouds but they might be totally flooded as well, due to the observations in the surrounding areas of the district. This is a preliminary analysis and has not yet been validated in the field. Please send ground feedback to UNITAR UNOSAT.
  • This map illustrates satellite-detected flood water extent in Somali Region, Ethiopia. The analysis was conducted by analysing a Sentinel-1 image acquired on the 1 May 2018. As observed from the satellite radar image, a total of 9,200 ha of land were inundated in the area of interest. By using WorldPop data, we estimate that at least 12,000 people are potentially affected or living close to the flooded area. This corresponds to about 7% of the population living in the area of interest. It is likely that flood waters have been systematically underestimated along highly vegetated areas along main river banks and within built-up urban areas because of 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.
  • This map illustrates satellite-detected flood water extent in Somali Region, Ethiopia. The analysis was conducted by analysing a Sentinel-1 image acquired on the 7 May 2018. As observed from the satellite radar image, a total of 11,329 ha of land were inundated in the area of interest. By using WorldPop data, we estimate that at least 8,800 people are potentially affected or living close to the potentially flooded area. This corresponds to about 6% of the population living in the area of interest. It is likely that flood waters have been systematically underestimated along highly vegetated areas along main river banks and within built-up urban areas because of 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.
  • This map illustrates satellite-detected flood water extent over the districts of Saakow and Bu'aale, Middle Juba, Somalia. The mostly affected areas are in the district of Saakow, where 365 km2 of land are flooded. In total, 19 settlements are within the inundated zones: 12 in Buaale and 7 in Saakow; however, more than 100 settlements, are within 500 meters distance from the flooded areas and might be affected due to the proximity to Juba River. This is a preliminary analysis and has not yet been validated in the field. Please send ground feedback to UNITAR - UNOSAT.
  • This map illustrates satellite-detected flood water extent and potentially damaged buildings within the town of Belet Weyne in Belet Weyne District,Hiiran Region, Somalia. The analysis was conducted analyzing GeoEye-1 & WorldView-3 images acquired on the 30 April & 1 May 2018. As observed from the satellite image, the town of Belet Weyne is completely affected by the floods. Within the extension of the town, 66% of the buildings are located inside areas totally inundated and 34% inside areas partially inundated. Building footprints were generated by Humanitarian Open Street Map using an image from 2015, so the number of buildings affected might have been underestimated. This is a preliminary analysis and has not yet been validated in the field. Please send ground feedback to UNITAR UNOSAT.
  • This map illustrates satellite-detected flood water extent in the district of Jilib, Middle Juba, Somalia. The analysis was conducted analyzing Sentinel-1 images acquired on the 1 May 2018. As observed from the satellite imagery, a total of 92,000 ha of land were inundated in the area of interest. The most affected districts are Saakow, with almost 38,000 ha of flooded land and southern Diinsoor, with almost 27,000 ha. At least 20 settlements are potentially located within the flooded area. It is likely that flood waters have been systematically underestimated along highly vegetated areas along main river banks and within built-up urban areas because of 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.
  • This map illustrates satellite-detected flood water extent over the district of Belet Weyne, Hiraan region, Somalia using a SAR image from 06 May 2018 and an optical VHR image over Beledweyne town. More than 2800 km2 of lands were assessed and about 19,000 ha (190km2) appear to be inundated which corresponds to about to about 7% of the total analysed zone. In this analysed area and according to WorldPop data the population is estimated to ~126,000 people, ~ 32,000 live in the flooded zone and about 70,000 within 100 meters distance from the flooded areas. It is likely that flood waters have been systematically underestimated along highly vegetated areas along main river banks and within built-up urban areas because of 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.
  • This map illustrates satellite-detected flood water extent over Booco and Hagan areas, Hiraan region, Somalia using a Radarsat-2 image acquired on 09 May 2018. Within the extent of the map about 4,000 ha of land appear to be inundated and according to WorldPop data, ~22,000 people, live within the extent of this map about 6,500 within 100 meters distance from the flooded areas which corresponds to about 30% of population in this zone. It is likely that flood waters have been systematically underestimated along highly vegetated areas along main river banks and within built-up urban areas because of 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.
  • This is "Flood vectors - MODIS-Aqua (16 August 2010)" of the Flood analysis for Pakistan which began on 02 August 2010. It includes 826 satellite detected water bodies with a spatial extent of 23,732.73 square kilometers derived from the MODIS-Aqua image ...
    • KMZ
    • ZIP
    • This dataset updates: Never
  • This is "Flood vectors - MODIS-Terra (11 August 2013)" of the Flood analysis for Sudan which began on 06 August 2013. It includes 142 satellite detected water bodies with a spatial extent of 14,897.21 square kilometers derived from the MODIS-Terra image a...
    • KMZ
    • ZIP
    • This dataset updates: Never
  • This is "Flood vectors - TerraSAR-X (27 March 2010)" of the Flood analysis for Pakistan which began on 22 August 2011. It includes 1,371 satellite detected water bodies with a spatial extent of 177.59 square kilometers derived from the TerraSAR-X image ac...
    • KMZ
    • ZIP
    • This dataset updates: Never
  • This is "Flood vectors - Radarsat-2 (05 September 2012)" of the Flood analysis for Senegal which began on 22 August 2012. It includes 10,974 satellite detected water bodies with a spatial extent of 749.18 square kilometers derived from the Radarsat-2 imag...
    • KMZ
    • ZIP
    • 10+ Downloads
    • This dataset updates: Never
  • This is "Flood vectors - Radarsat-1 (20 March 2008)" of the Flood analysis for Angola which began on 20 March 2008. It includes 10,268 satellite detected water bodies with a spatial extent of 815.05 square kilometers derived from the Radarsat-1 image acqu...
    • KMZ
    • ZIP
    • This dataset updates: Never
  • This is "Flood vectors - ASAR IMP (01 September 2010)" of the Flood analysis for Pakistan which began on 02 August 2010. It includes 2,928 satellite detected water bodies with a spatial extent of 1,170.3 square kilometers derived from the ASAR IMP image a...
    • KMZ
    • ZIP
    • This dataset updates: Never
  • This is "Flood vectors - MODIS-Aqua (04 February 2008)" of the Flood analysis for Namibia which began on 01 February 2008. It includes 1,627 satellite detected water bodies with a spatial extent of 8,447.23 square kilometers derived from the MODIS-Aqua im...
    • KMZ
    • ZIP
    • This dataset updates: Never
  • This is "Flood vectors - TerraSAR-X (21 September 2011)" of the Flood analysis for Cambodia which began on 12 October 2011. It includes 12,718 satellite detected water bodies with a spatial extent of 1,930.64 square kilometers derived from the TerraSAR-X ...
    • KMZ
    • ZIP
    • This dataset updates: Never
  • This is "Flood vectors - Radarsat-1 (07 July 2007)" of the Flood analysis for Pakistan which began on 02 August 2010. It includes 4,553 satellite detected water bodies with a spatial extent of 4,465.52 square kilometers derived from the Radarsat-1 image a...
    • KMZ
    • ZIP
    • This dataset updates: Never
  • This is "Flood vectors - MODIS-Terra (11 August 2010)" of the Flood analysis for Pakistan which began on 02 August 2010. It includes 70 satellite detected water bodies with a spatial extent of 11,852.98 square kilometers derived from the MODIS-Terra image...
    • KMZ
    • ZIP
    • This dataset updates: Never
  • This is "Flood vectors - MODIS-Terra (13 February 2008)" of the Flood analysis for Bolivia which began on 18 January 2008. It includes 17,197 satellite detected water bodies with a spatial extent of 0.0 square kilometers derived from the MODIS-Terra image...
    • KMZ
    • ZIP
    • This dataset updates: Never
  • This is "Flood vectors - MODIS-Terra (31 July 2007)" of the Flood analysis for China which began on 24 April 2007. It includes 9,892 satellite detected water bodies with a spatial extent of 300,252.38 square kilometers derived from the MODIS-Terra image a...
    • KMZ
    • ZIP
    • 10+ Downloads
    • This dataset updates: Never
  • This is "Flood vectors - MODIS-Aqua (10 August 2010)" of the Flood analysis for Pakistan which began on 02 August 2010. It includes 79 satellite detected water bodies with a spatial extent of 9,969.24 square kilometers derived from the MODIS-Aqua image ac...
    • KMZ
    • ZIP
    • This dataset updates: Never