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-26-1745-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/nhess-26-1745-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 26, issue 4
Research article
 | 
16 Apr 2026
Research article |  | 16 Apr 2026

The damability function: a probabilistic approach to regional landslide dam susceptibility analysis applied to the Oregon Coast Range, USA

Paul M. Morgan, Alex Grant, Will Struble, Sean LaHusen, and Alison Duvall

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Short summary
When landslides dam rivers, the impacts can include catastrophic outburst flooding. This work defines a function that combines river valley widths and landslide volumes to find the likelihood that a river will be dammed by a potential landslide or ‘damability’. We apply the method to the Oregon Coast Range and find widespread high damability especially where rivers flow through steep mountains with strong rocks. Our new workflow is flexible and can be applied more broadly to other regions.
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