The importance of entrainment and bulking on debris flow runout modeling: examples from the Swiss Alps

Frank, F.; McArdell, B. W.; Huggel, C.; Vieli, A.

doi:https://doi.org/10.5194/nhess-15-2569-2015

Articles | Volume 15, issue 11

https://doi.org/10.5194/nhess-15-2569-2015

© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

https://doi.org/10.5194/nhess-15-2569-2015

© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 15, issue 11

Research article

|

30 Nov 2015

Research article |

| 30 Nov 2015

The importance of entrainment and bulking on debris flow runout modeling: examples from the Swiss Alps

F. Frank, B. W. McArdell, C. Huggel, and A. Vieli

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Latest update: 07 Nov 2025

Short summary

The sudden onset of large and erosive debris flows has been observed recently in different catchments in Switzerland, implicating the importance of erosion for debris flow modelling. Therefore, an erosion model was established based on field data (relationship between maximum shear stress and erosion depth and rate) of several debris flows measured at the Illgraben. Erosion model tests at the Spreitgraben showed considerable improvements in runout pattern as well as hydrograph propagation.