segunda-feira, 16 de novembro de 2015

Flooding in Brazil After Dam Breach #Mariana-MG

acquired October 11, 2015 download large image (14 MB, JPEG, 4000x4000)
acquired November 12, 2015 download large image (14 MB, JPEG, 4000x4000) 
Two dams that hold waste from an iron ore mine in southeast Brazil collapsed on November 5, 2015, sending a torrent of sludge through the nearby village of Bento Rodrigues. The muddy floodwaters destroyed hundreds of homes, and rescuers searched for missing residents.
The Operational Land Imager (OLI) on Landsat 8 captured these natural-color views of the village and the surrounding region. The top image shows the area on October 11, before the incident; the bottom image shows the area afterward, on November 12. Turn on the image comparison tool to see areas where mud was still visible about a week after the dams broke.
The Wall Street Journal reported that 60 million cubic meters of wastewater were unleashed, most affecting Bento Rodrigues, which lies to the southeast. The village happens to be located close to the breach, and sits in a river valley just below one of the dams.
The effects of the flooding, however, were felt far beyond Bento Rodrigues. The image shows myriad rivers far from the village that remained swollen and inundated with mud. East of this image in Barra Longa—a village about 80 kilometers (50 miles) away from the dams—the river had surged up to 15 meters and flooded homes, according to Reuters. As health officials conducted tests, cities as far as 300 kilometers (200 miles) downstream lost access to drinking water.
As of November 12, rescuers had recovered the bodies of nine people, according to ABC News; 19 people were still missing.
NASA Earth Observatory images by Joshua Stevens, using Landsat data from the U.S. Geological Survey. Caption by Kathryn Hansen.
Instrument(s): Landsat 8 - OLI
Via NASA - Earth Observatory

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