Understanding the danger of dammed lakes following Nepal-Tibet flooding
A dammed lake hazard happens when river flow is obstructed by glacier debris or collapses, causing water to accumulate behind a fragile wall. As the trapped water volume increases, the reservoir creates immense pressure, eventually leading to a breach or overflow that results in a sudden, destructive flash flood. In the wake of the floods in Nepal and Tibet, these upstream obstructions remain a significant danger to nearby communities, local infrastructure, and ongoing emergency relief efforts.
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