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23 May 2017 description

The Normalized Difference Vegetation Index (NDVI) is an indicator of vegetation health. NDVI is calculated from the visible and nearinfrared light reflected by vegetation. Healthy vegetation absorbs most of the visible light that hits it, and reflects a large portion of the near-infrared light. Unhealthy or sparse vegetation reflects more visible light and less near-infrared light. The time frame has been chosen to compare vegetation health before and after Hurricane Matthew.

03 May 2017 description

This map illustrates the satellite-detected water and/or saturated wet soil extent in Solon Communal Section, St. Louis du Sud Commune in Sud Department located in the southwestern part of Haiti. The UNITAR-UNOSAT analysis used a WorldView-2 satellite image acquired on the 28 April 2017 and could observe areas with standing waters and saturated wet soil mainly affecting agricultural fields. The UNITAR-UNOSAT analysis identified 118 ha of those areas, which cover 8.50% of this map's extent of 1385 ha of land. This is a preliminary analysis and has not yet been validated in the field.

01 May 2017 description

This map illustrates the satellite-detected water extent in Cavaillon commune in Sud Department (Haiti) located in the southwestern part of Haiti. The UNITAR-UNOSAT analysis used a Sentinel-1 satellite image acquired on the 26 April 2017 and a Radarsat-2 image acquired on the 17 May 2016 and could observe areas with standing waters mainly affecting agricultural fields. The UNITAR-UNOSAT analysis identified 566 ha of flooded areas, which cover 7% of this map's extent of ~8500 ha of land. The increase of waters within the analyzed zone is about 550%.

01 May 2017 description

This map illustrates the satellite-detected water extent in Les Cayes and Cavaillon communes in Sud Department (Haiti) located in the southwestern part of Haiti. The UNITAR-UNOSAT analysis used a Sentinel-1 satellite image acquired on the 26 April 2017 and a Radarsat-2 image acquired on the 17 May 2016 and could observe areas with standing waters mainly affecting agricultural fields. The UNITAR-UNOSAT analysis identified 718 ha of flooded areas, which cover ~4% of this map's extent of ~20300 ha of land. The increase of waters within the analyzed zone is about 460%.

01 May 2017 description

This map illustrates the satellite-detected water extent and evolution between 26 and 28 April 2017 in Les Cayes and Cavaillon communes in Sud Department located in the southwestern part of Haiti. The UNITAR-UNOSAT analysis used a Radarsat-2 image acquired on the 28 April 2017 and a Sentinel-1 satellite image acquired on the 26 April 2017. Between 26 and 28 April 2017 and within this map extent, waters receded from about ~590 ha of mainly agricultural lands : ~873 ha of satellite detected waters were observed on the 26 April 2017 and decreased to ~280 ha on the 28 April 2017.

28 Apr 2017 description

Situation

  • Heavy rain has been affecting the Central Caribbean islands over the past few weeks, causing floods and landslides.