Abstract
In summer 2018, in an area above lake Oeschinen in Kandersteg (Bernese Alps, Switzerland), significant terrain changes with indication of fast ground movements were observed. The NW dipping rock and debris slope named “Bim Spitze Stei” had been known to be under constant movement before. However, the rapid acceleration from a maximum volume prone to failure of about 20 mm3 prompted the authorities to undertake a thorough analysis of the situation and analyse primary (rock avalanche) and secondary (floods and debris-flows out of the rock avalanche debris) hazard processes and the risk they pose to the nearby Village of Kandersteg. A first assessment of the most recent Sentinel-1 satellite InSAR data confirmed rapid ground movement in the order of several mm/d up to cm/d and a rapid acceleration of the west-flank of “Bim Spitze Stei” landslide from initially 7 mm/d to few cm/d within 2 weeks in July 2018. In addition, different sectors with different kinematics could be identified by interpretation of single interferograms. In a second step, an archive analysis of historical InSAR data reaching back to 1991 clearly showed that an acceleration trend from initially sub-stable conditions up to several m/a. Finally, based on the findings from the satellite InSAR analysis, a survey campaign with a terrestrial radar interferometer was performed in order to define the current state and location of the potentially outcropping glide plane in the west-flank. The successful campaign led to the observation of the presence of two active glide planes with the lowermost encompassing the maximum estimated volume of the mass in movement thus helping for the definition of potential failure scenarios thus helping in the selection of enhanced monitoring systems and increasing the preparedness for the runout-areas.
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References
Caduff R, Schlunegger F, Kos A, Wiesmann A (2015) A review of terrestrial radar interferometry for measuring surface change in the geosciences. Earth Surf Process Landforms 40(2):208–228
Caduff R, Strozzi T (2017) Terrestrial radar interferometry monitoring during a landslide emergency 2016, Ghirone, Switzerland. In: Workshop on world landslide forum, pp 301–309
Frank F, Huggel C, McArdell BW, Vieli A (2019) Landslides and increased debris-flow activity: a systematic comparison of six catchments in Switzerland. Earth Surf Process Landforms 44(3):699–712
Hauck C, Hilbich C, Mollaret C (2017) Geophysikalische Untersuchungen zur Permafrost-Verbreitung im Berner Oberland, 2015–2016, Report 1. Departement Geowissenschaften Universität Fribourg
Knapp S, Gilli A, Anselmetti F S, Hajdas I (2018) Multistage rock-slope failures revealed in lake sediments in a seismically active alpine region (Lake Oeschinen, Switzerland). J Geophys Res Earth Surf 123(4)
Köpfli P, Grämiger LM, Moore J R, Vockenhuber C, Ivy-Ochs S (2018) The Oeschinensee rock avalanche, Bernese Alps, Switzerland: a co-seismic failure 2300 years ago? Swiss J Geosci
Manconi A, Kourkouli P, Caduff R, Strozzi T, Loew S (2018) Monitoring surface deformation over a failing rock slope with the ESA Sentinels: insights from Moosfluh instability Swiss Alps. Remote Sens 10(5):672
Singeisen C, Ivy-Ochs S, Wolter A, Steinemann O, Akçar N, Yesilyurt S, Vockenhuber C (2020) The Kandersteg rock avalanche (Switzerland): integrated analysis of a late Holocene catastrophic event. Landslides
Strozzi T, Delaloye R, Kääb A, Ambrosi C, Perruchoud E, Wegmüller U (2010) Combined observations of rock mass movements using satellite SAR interferometry, differential GPS, airborne digital photogrammetry, and airborne photography interpretation. J Geophys Res Earth Surf 115(F1)
Tinner W, Kaltenrieder P, Soom M, Zwahlen P, Schmidhalter M, Boschetti A, Schlüchter C (2005) Der nacheiszeitliche Bergsturz im Kandertal (Schweiz): Alter und Auswirkungen auf die damalige Umwelt. Eclogae Geol Helv 98:83–95. https://doi.org/10.1007/s00015-005-1147-8
Walter F, Amann F, Kos A, Kenner R, Phillips M, de Preux A, Bonanomi Y (2020) Direct observations of a three million cubic meter rock-slope collapse with almost immediate initiation of ensuing debris flows. Geomorphology 351:106933
Acknowledgments
Data used for this study: JERS-1 SAR, ALOS-1 PALSAR-1 and ALOS-2 PALSAR-2 data are copyright JAXA. ERS-1/2 and ENVISAT data are copyright ESA. TERRASAR-X data are copyright DLR. Cosmo-SkyMED data are copyright ASI. Radarsat-2 data are copyright MDA. Sentinel-1 images available from Copernicus. Part of the work was funded by Eureka and Innosuisse in the frame of the EUROSTARS Project E! 113220 RAMON.
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Caduff, R., Strozzi, T., Hählen, N., Häberle, J. (2021). Accelerating Landslide Hazard at Kandersteg, Swiss Alps; Combining 28 Years of Satellite InSAR and Single Campaign Terrestrial Radar Data. In: Vilímek, V., Wang, F., Strom, A., Sassa, K., Bobrowsky, P.T., Takara, K. (eds) Understanding and Reducing Landslide Disaster Risk. WLF 2020. ICL Contribution to Landslide Disaster Risk Reduction. Springer, Cham. https://doi.org/10.1007/978-3-030-60319-9_29
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