Study Shows Previously Unexplained Factors that Determine the Destructive Force of Debris Flows

Swiss research explains dynamics of destructive debris flows

For the study, a team led by ETH Zurich analysed a June 2022 debris flow in Valais with unprecedented precision.

Study shows previously unexplained factors that determine the destructive force of debris flows

The landslide that occurred in Blatten in the canton of Valais at the end of May 2025 and the one in the village of Brienz in Graubünden in June 2023 remind us of the potential for landslide hazards in the Alps. Debris flows are one such hazard. These flows of water, sediment and rock fragments typically occur after heavy rainfall in steep terrain, and rapidly travel down a channel, potentially destroying everything in their path.

New study reveals the hidden forces behind Alpine debris flows, boosting future protection

New research provides unprecedented insights into the hidden forces behind devastating Alpine debris flows, offering hope for better protection against future disasters.The study, led by ETH Zurich and supported by The University of Manchester, sheds new light on how fast-moving mixtures of water, soil and rocks – known as debris flows – develop into a series of surges, destroying everything in their path. Using highly sensitive 3D laser scanner…

Hidden forces behind Alpine debris flows, boosting future protection

17.07.2025 - New research provides unprecedented insights into the hidden forces behind devastating Alpine debris flows, offering hope for better protection against future disasters. The study, led by ETH Zurich and supported by The University of Manchester , sheds new light on how fast-moving mixtures of water, soil and rocks - known as debris flows - develop into a series of surges, destroying e

Debris Flows in the Mountains: Why They’re More Deadly Today

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