Articles | Volume 20, issue 11
Nat. Hazards Earth Syst. Sci., 20, 3179–3196, 2020
https://doi.org/10.5194/nhess-20-3179-2020
Nat. Hazards Earth Syst. Sci., 20, 3179–3196, 2020
https://doi.org/10.5194/nhess-20-3179-2020

Research article 27 Nov 2020

Research article | 27 Nov 2020

Semi-empirical prediction of dam height and stability of dams formed by rock slope failures in Norway

Thierry Oppikofer et al.

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Revised manuscript accepted for NHESS
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Cited articles

Böhme, M., Oppikofer, T., Longva, O., Jaboyedoff, M., Hermanns, R. L., and Derron, M.-H.: Analyses of past and present rock slope instabilities in a fjord valley: implications for hazard assessment, Geomorphology, 248, 464–474, https://doi.org/10.1016/j.geomorph.2015.06.045, 2015. 
Böhme, M., Bunkholt, H., Dehls, J. F., Oppikofer, T., Hermanns, R. L., Dalsegg, E., Kristensen, L., Lauknes, T. R., and Eriksen, H. Ø.: Geologisk modell og fare- og risikoklassifisering av det ustabile fjellpartiet Gamanjunni 3 i Manndalen, Troms, Geol. Surv. Norw., Trondheim, Norway, NGU report 2016.031, 63 pp., 2016 (in Norwegian). 
Casagli, N., Ermini, L., and Rosati, G.: Determining grain size distribution of the material composing landslide dams in the Northern Apennines: sampling and processing methods, Eng. Geol., 69, 83–97, https://doi.org/10.1016/S0013-7952(02)00249-1, 2003. 
Christen, M., Bühler, Y., Bartelt, P., Leine, R., Glover, J., Schweizer, A., Graf, C., McArdell, B. W., Gerber, W., Deubelbeiss, Y., Feistl, T., and Volkwein, A.: Integral hazard management using a unified software environment: numerical simulation tool ”RAMMS” for gravitational natural hazards, in: Proceedings of the 12424 Congress INTERPRAEVENT, Grenoble, France, 23–26 April 2012, 77–86, 2012. 
Corominas, J.: The angle of reach as a mobility index for small and large landslides, Can. Geotech. J., 33, 260–271, 1996. 
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Short summary
Damming of rivers is an important secondary effect of landslides due to upstream flooding and possible outburst floods in case of dam failure. For preliminary regional hazard and risk assessment of dams formed by rock slope failures in Norway, we developed semi-empirical relationships to assess the height and stability of dams based on an inventory of 69 dams formed by rock slope failures in southwestern Norway and published landslide dam inventories from other parts of the world.
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