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Geographica Helvetica
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Short summary
The erosion of and depositions on channel bed surfaces are instrumental to understanding debris flow processes. We present different methods and highlight their pro and cons. Terrestrial and airborne laser scanning, erosion sensors, cross sections and geomorphological mapping are compared. Two of these approaches are tested and applied in a torrent. The results indicate that the methods are associated with variable temporal and spatial resolution as well as data quality and invested effort.
Articles | Volume 70, issue 4
Geogr. Helv., 70, 265–279, 2015
https://doi.org/10.5194/gh-70-265-2015

Special issue: Mapping, measuring and modeling in geomorphology

Geogr. Helv., 70, 265–279, 2015
https://doi.org/10.5194/gh-70-265-2015

Standard article 06 Oct 2015

Standard article | 06 Oct 2015

Methods for detecting channel bed surface changes in a mountain torrent – experiences from the Dorfbach torrent

C. Willi et al.

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Cited articles

Berger, C., McArdell, B. W., Fritschi, B., and Schlunegger, F.: A novel method for measuring the timing of bed erosion during debris flows and floods, Water Resour. Res., 46, W02502, https://doi.org/10.1029/2009WR007993, 2010.
Berger, C., McArdell, B. W., and Schlunegger, F.: Direct measurement of channel erosion by debris flows, Illgraben, Switzerland, J. Geophys. Res., 116, F01002, https://doi.org/10.1029/2010JF001722, 2011.
Breien, H., Blasio, F. V. d., Elverhøi, A., and Høeg, K.: Erosion and morphology of a debris flow caused by a glacial lake outburst flood, Western Norway, Landslides, 5, 271–280, 2008.
Bühler, Y. and Graf, C.: Sediment transfer mapping in a high-alpine catchment using airborne LiDAR, Mattertal – ein Tal in Bewegung, Publikation zur Jahrestagung der Schweizerischen Geomorphologischen Gesellschaft 29 Juni–1 Juli 2011, St. Niklaus, 2013.
Bühler, Y., Marty, M., and Ginzler, C.: High resolution DEM generation in high-alpine terrain using airborne remote sensing techniques, Transaction in GIS, 16, 635–647, https://doi.org/10.1111/j.1467-9671.2012.01331.x, 2012.
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Short summary
The erosion of and depositions on channel bed surfaces are instrumental to understanding debris flow processes. We present different methods and highlight their pro and cons. Terrestrial and airborne laser scanning, erosion sensors, cross sections and geomorphological mapping are compared. Two of these approaches are tested and applied in a torrent. The results indicate that the methods are associated with variable temporal and spatial resolution as well as data quality and invested effort.
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