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Satellite Images Show Rivers Flooded on Nepal-China Border
Scientists said the collapse sent ice, rock and debris downstream, killing hundreds and leaving thousands missing in Nepal and Tibet.
Satellite imagery revealed that a bedrock collapse triggered catastrophic flooding along the Nepal-China border on Wednesday, killing hundreds of people in Nepal and Tibet with hundreds more missing.
In clearer images from Thursday, scientists observed that bedrock underneath the glacier on Langtang Lirung peak had collapsed, taking a massive chunk of ice down and sending boulders and debris into the valley.
The Trishuli River surged and overtopped its banks, turning brown with sediment as it transported massive amounts of mud and rock downstream, while buildings were toppled and swept away in Syapru Besi, a popular tourist destination where the Langtang trek begins.
Mountain geographer Alton Byers of the University of Colorado Boulder said the flooding "left a wasteland in its wake" that will take many years to recover from, as rescue teams continue searching for missing people and authorities monitor new hazards.
Geomorphologists Kristen Cook and Dan Shugar cautioned they cannot definitively link this collapse to climate change, though Cook noted such events are "not unexpected" with warming trends; Byers believes warming is melting glaciers and destabilizing permafrost at high altitudes.