October 31, 2008
ENVISAT Helps Aid Workers In Honduras
Humanitarian aid workers responding to devastating flooding in Honduras have received assistance from space, with satellite images of affected areas provided rapidly following activation of the International Charter on Space and Major Disasters.
Tens of thousands of people have been displaced and 33 lives have been claimed by floods and landslides brought on by a tropical depression that hit the Central American country on October 16.On October 27, the UN Institute for Training and Research (UNITAR) Operational Satellite Applications Program (UNOSAT) asked the International Charter on 'Space and Major Disasters', referred to as 'The Charter', for support. Satellite images of the area acquired by ESA's Envisat were delivered the same day.
The Charter, founded in October 2000 by ESA, the French Space Agency (CNES) and the Canadian Space Agency (CSA), works to provide satellite data free of charge to those affected by disasters anywhere in the world.
With inundated areas typically visible from space, Earth Observation (EO) is increasingly being used for flood response and mitigation. One of the biggest problems during flooding emergencies is obtaining an overall view of the phenomenon, with a clear idea of the extent of the flooded area.
The crisis image of the Cortes Department, one of the hardest hit areas, is comprised of two Envisat radar images "“ one acquired on 25 October and one on 20 September that was used as a reference. The blue and red colors indicate areas that are potentially flooded.
The flooding is being compared to the devastation left by Hurricane Mitch, which killed about 6 000 people when it ripped through Honduras a decade ago. Overall, Mitch claimed more than 10 000 lives across Central America.
In the wake of Hurricane Mitch, ESA, CNES and Spot Image worked to provide rapid and accurate EO-based maps of the area to emergency response teams. The reaction by the space community to the impact of Mitch is considered a precursor to the Charter.
Today, the Charter has 10 members, including ESA, CNES, CSA, the Indian Space Research Organization (ISRO), the US National Oceanic and Atmospheric Administration (NOAA), the Argentine Space Agency (CONAE), the Japan Aerospace Exploration Agency (JAXA), the British National Space Center/Disaster Monitoring Constellation (BNSC/DMC), the U.S. Geological Survey (USGS) and the China National Space Administration (CNSA).
Image 1: Aerial view of flooded areas in the locality of Reyes Caballero, Cortes Department, Honduras. Tens of thousands of people have been displaced and 33 lives have been claimed by floods and landslides brought on by a tropical depression that hit the Central American country on 16 October. Credits: AFP
Image 2: Honduras has been affected by severe flooding and landslides since 16 October 2008. This map, over the Cortes Department, is comprised of two Envisat Advanced Synthetic Aperture Radar (ASAR) images "“ one acquired before flooding (20 September 2008) and one acquired after flooding (25 October 2008). Black and white areas correspond to places where the radar signal did not change. Blue indicates areas where the radar signal dropped, and red indicates areas where the signal increased. Both blue and red colors indicate areas that are potentially flooded. Credits: ESA
On the Net:
- UN Institute for Training and Research
- Operational Satellite Applications Program
- International Charter on 'Space and Major Disasters'