Natural Hazards and Earth System Sciences
Natural Hazards and Earth System Sciences
NHESS
Articles | Volume 26, issue 4
Articles | Volume 26, issue 4
https://doi.org/10.5194/nhess-26-1883-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/nhess-26-1883-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 26, issue 4
Brief communication
 | 
24 Apr 2026
Brief communication |  | 24 Apr 2026

Brief communication: In-situ measurements of basal sliding in natural debris flows

Georg Nagl, Maximilian Ender, Felix Klein, Brian McArdell, Stefan Boss, Jordan Aaron, Friedrich Zott, Johannes Hübl, and Roland Kaitna

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Short summary
Debris flows are fast-moving mixtures of rocks, sediment, and water that threaten mountain communities. Their speed is controlled partly by sliding at the flow base, but this has never been directly measured in nature. We built a novel sensor setup in Tyrol, Austria, to close this gap. Two events showed signs of partial occurrence of base sliding, strongest at the flow front. Future work will study more events and refine the approach to improve hazard prediction.
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