Nepal-Tibet flash flood

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inmyopinion

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Translated from Hindi.

China's helicopter reached the spot where the glacier had broken, and the water released from it had caused massive destruction in Nepal. This event is called a GLOF.

Glacial Lake Outburst Flood (#GLOF) can occur when the dam of a lake held back by a glacier suddenly bursts. 🌊🧊

Water pressure and cracks in the glacier create a path for the water to escape. After that, the massive amount of water and debris accumulated in the lake flows down from the mountains at extremely high speed, which can lead to sudden and devastating floods.
 
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Smarty22

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In this day and age with advance technology and satellites images am amazed there was no warning of the impending disaster?
 
nachtsid.er

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Smarty22 said:
In this day and age with advance technology and satellites images am amazed there was no warning of the impending disaster?
Click to expand...

Running won’t help​

A preliminary assessment by the Kathmandu-based International Centre for Integrated Mountain Development (ICIMOD) found “no anomalies” from the Chinese side of the border.

“We believe a rock-ice avalanche occurred in Nepal, blocking the Lhende river and causing the cascading flood event,” Sarthak Shrestha, a remote sensing and geo information analyst with the intergovernmental institute, told AFP.

Hatim Sharif, a hydrologist at the University of Texas San Antonio, told AFP one thing that struck him was the lack of rainfall beforehand.

“That defeats essentially every operational flood warning system in the world,” he said.

By the time you see the mud flow coming, it’s too late.

“Running will not help,” nor will trying to flee by vehicle, Sharif added, because the mud and water moving at high speed form a lethal combination “like liquid concrete.”

The only solution is to climb up a hill, at least 6m, he estimates.

One possible long-term remedy might be river level gauges that relay changes to authorities in real-time, giving residents 20 to 30 minutes of warning, he said.

Qianggong Zhang, head of climate and environmental risks at ICIMOD, warned of the potential for a second flood because of an ongoing blockage upstream.
 
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