Natural Hazards and Earth System Sciences
Natural Hazards and Earth System Sciences
NHESS
Articles | Volume 18, issue 3
Articles | Volume 18, issue 3
https://doi.org/10.5194/nhess-18-759-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/nhess-18-759-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 18, issue 3
07 Mar 2018
 | 07 Mar 2018

Dynamic magnification factors for tree blow-down by powder snow avalanche air blasts

Perry Bartelt, Peter Bebi, Thomas Feistl, Othmar Buser, and Andrin Caviezel

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Latest update: 09 Jun 2023
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Short summary
We study how short duration powder avalanche blasts break and overturn tall trees. Tree blow-down is often used to back-calculate avalanche pressure and therefore constrain avalanche flow velocity and motion. We find that tall trees are susceptible to avalanche air blasts because the duration of the air blast is near to the period of vibration of tall trees. Dynamic magnification factors should therefore be considered when back-calculating powder avalanche impact pressures.
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