RAMMS::Extended

The RAMMS::Extended model was developed to simulate the motion of mixed flowing/powder avalanches in general three-dimensional terrain. Application of the existing, operational RAMMS model (Christen et al. 2010) is limited to the simulation of dense flowing avalanches without snow entrainment. The RAMMS::Extended model simulates both the avalanche core and the powder cloud and includes snow entrainment, and other processes, such as temperature and avalanche interaction with mountain forests. The model also includes impact pressure modules for both the avalanche core and powder cloud to better determine external avalanche loads on both wide (buildings) and slender (pylons) structures.

If you are a RAMMS::Avalanche user, and are interested in testing RAMMS::Extended, then get in contact with us!

 

Theory

Video

Powder avalanche example with RAMMS::Extended

Powder avalanche example with RAMMS::Extended

Publications

EXTENDED Publication List

Ivanova, K.; Caviezel, A.; Bühler, Y.; Bartelt, P., 2022: Numerical modelling of turbulent geophysical flows using a hyperbolic shear shallow water model: application to powder snow avalanches. Computers and Fluids, 233: 105211 (9 pp.). doi: 10.1016/j.compfluid.2021.105211

Caviezel, A.; Margreth, S.; Ivanova, K.; Sovilla, B.; Bartelt, P., 2021: Powder snow impact of tall vibrating structures. In: Papadrakakis, M.; Fragiadakis, M. (eds), 2021: Compdyn 2021 proceedings. COMPDYN 2021. 8th ECCOMAS thematic conference on computational methods in structural dynamics and earthquake engineering, Athens, Greece. 19112 (13 pp.).

Frigo, B.; Bartelt, P.; Chiaia, B.; Chiambretti, I.; Maggioni, M., 2021: A reverse dynamical investigation of the catastrophic wood-snow avalanche of 18 January 2017 at Rigopiano, Gran Sasso National Park, Italy. International Journal of Disaster Risk Science, 12: 40-55. doi: 10.1007/s13753-020-00306-6

Miller, A.; Sirguey, P.; Morris, S.; Bartelt, P.; Cullen, N.; Buhler, Y., 2021: Avalanche modelling on the Milfoard Road. New Zealand Avalanche Dispatch, 43-47.

Brožová, N.; Fischer, J.; Bühler, Y.; Bartelt, P.; Bebi, P., 2020: Determining forest parameters for avalanche simulation using remote sensing data. Cold Regions Science and Technology, 172: 102976 (11 pp.). doi: 10.1016/j.coldregions.2019.102976

Bartelt, P.; Buser, O.; Christen, M.; Caviezel, A., 2019: Dynamic magnification factors for snow avalanche impact (with pile-up) on walls and pylons. In: Papadrakakis, M.; Fragiadakis, M. (eds), 2019: COMPDYN 2019. 7th international conference on computational methods in structural dynamics and earthquake engineering. Proceedings. COMPDYN 2019. 7th ECCOMAS thematic conference on computational methods in structural dynamics and earthquake engineering, Crete, Greece. 4376-4385.

Kääb, A.; Leinss, S.; Gilbert, A.; Bühler, Y.; Gascoin, S.; Evans, S.G.; Bartelt, P.; Berthier, E.; Brun, F.; Chao, W.; Farinotti, D.; Gimbert, F.; Guo, W.; Huggel, C.; Kargel, J.S.; Leonard, G.J.; Tian, L.; Treichler, D.; Yao, T., 2018: Massive collapse of two glaciers in western Tibet in 2016 after surge-like instability. Nature Geoscience, 11, 2: 114-120. doi: 10.1038/s41561-017-0039-7

Vera Valero, C.; Wever, N.; Christen, M.; Bartelt, P., 2018: Modeling the influence of snow cover temperature and water content on wet-snow avalanche runout. Natural Hazards and Earth System Science, 18, 3: 869-887. doi: 10.5194/nhess-18-869-2018

Bühler, Y.; Von Rickenbach, D.; Stoffel, A.; Margreth, S.; Stoffel, L.; Christen, M., 2018: Automated snow avalanche release area delineation – validation of existing algorithms and proposition of a new object-based approach for large-scale hazard indication mapping. Natural Hazards and Earth System Science, 18, 12: 3235-3251. doi: 10.5194/nhess-18-3235-2018

Bartelt, P.; Christen, M.; Bühler, Y.; Buser, O., 2018: Thermomechanical modelling of rock avalanches with debris, ice and snow entrainment. In: Cardoso, A.S.; Borges, J.L.; Costa, P.A.; Gomes, A.T.; Marques, J.C.; Vieira, C.S. (eds), 2018: Numerical methods in geotechnical engineering IX. 9th European conference on numerical methods in geotechnical engineering (NUMGE 2018), Porto. 1047-1054.

Wikstrom Jones, K.; Loso, M.G.; Bartelt, P., 2018: Modeled mass and temperature effects of entrained snow on the lubricated flow regime and implications for predicting avalanche runout distance. In: 2018: International snow science workshop proceedings 2018. International snow science workshop, ISSW 2018, Innsbruck. 84-88.

Schmidtner, K.; Bartelt, P.; Fischer, J.; Sailer, R.; Granig, M.; Sampl, P.; Fellin, W.; Stoffel, L.; Christen, M.; Bühler, Y., 2018: Comparsion of powder snow avalanche simulation models (RAMMS and SamosAT) based on reference events in Switzerland. In: 2018: International snow science workshop proceedings 2018. International snow science workshop, ISSW 2018, Innsbruck. 740-745.

Riba Porras, S.; García-Sellés, C.; Bartelt, P.; Stoffel, L., 2018: Analysis of one avalanche zone in the Eastern Pyrenees (Val d’Aran) using historical analysis, snow-climate data and mixed flowing/powder avalanche modelling. In: 2018: International snow science workshop proceedings 2018. International snow science workshop, ISSW 2018, Innsbruck. 561-565.

Frigo, B.; Chiaia, B.; Chiambretti, I.; Bartelt, P.; Maggioni, M.; Freppaz, M., 2018: The January 18th 2017 Rigopiano disaster in Italy - analysis of the avalanche dynamics. In: 2018: International snow science workshop proceedings 2018. International snow science workshop, ISSW 2018, Innsbruck. 6-10.

Bartelt, P.; Christen, M.; Bühler, Y.; Caviezel, A.; Buser, O., 2018: Snow entrainment: avalanche interaction with an erodible substrate. In: 2018: International snow science workshop proceedings 2018. International snow science workshop, ISSW 2018, Innsbruck. 716-720.

Bartelt, P.; Buser, O., 2018: Avalanche dynamics by Newton. Reply to comments on avalanche flow models based on the concept of random kinetic energy. Journal of Glaciology, 64, 243: 165-170. doi: 10.1017/jog.2018.1

Bartelt, P.; Bebi, P.; Feistl, T.; Buser, O.; Caviezel, A., 2018: Dynamic magnification factors for tree blow-down by powder snow avalanche air blasts. Natural Hazards and Earth System Science, 18, 3: 759-764. doi: 10.5194/nhess-18-759-2018

Bartelt, P.; Buser, O., 2016: Reply to "Discussion of "The relation between dilatancy, effective stress and dispersive pressure in granular avalanches" by P. Bartelt and O. Buser (DOI: 10.1007/s11440-016-0463-7)" by Richard Iverson and David L. George (DOI: 10.1007/s11440-016-0502-4). Acta Geotechnica, 11, 6: 1469-1473. doi: 10.1007/s11440-016-0503-3

Bartelt, P.; Buser, O., 2016: The relation between dilatancy, effective stress and dispersive pressure in granular avalanches. Acta Geotechnica, 11, 3: 549-557. doi: 10.1007/s11440-016-0463-7

Dreier, L.; Bühler, Y.; Ginzler, C.; Bartelt, P., 2016: Comparison of simulated powder snow avalanches with photogrammetric measurements. Annals of Glaciology, 57, 71: 371-381. doi: 10.3189/2016AoG71A532

Bartelt, P.; Buser, O.; Vera Valero, C.; Bühler, Y., 2016: Configurational energy and the formation of mixed flowing/powder snow and ice avalanches. Annals of Glaciology, 57, 71: 179-188. doi: 10.3189/2016AoG71A464

Stoffel, L.; Margreth, S.; Schaer, M.; Christen, M.; Bühler, Y.; Bartelt, P., 2016: Powder snow avalanche engineering: new methods to calculate air-blast pressures for hazard mapping. In: Koboltschnig, G. (eds), 2016: 13th congress INTERPRAEVENT 2016. 30 May to 2 June 2016. Lucerne, Switzerland. Conference proceedings "Living with natural risks". 13th congress INTERPRAEVENT 2016, Lucerne, Switzerland, May 30-June 2, 2016. 416-425.

Feistl, T.; Fischer, A.; Bebi, P.; Bartelt, P., 2016: Evaluation of protection measures against avalanches in forested terrain. In: 2016: International snow science workshop proceedings 2016. International snow science workshop, ISSW 2016, Breckenridge, CO, USA, October 2-7, 2016. 561-568.

Wikstrom Jones, K.; Bartelt, P.; Loso, M., 2016: Modeled mass and temperature effects of released and entrained snow on the lubricated wet flow regime of avalanches at Bird Hill, southcentral Alaska. In: 2016: International snow science workshop proceedings 2016. International snow science workshop, ISSW 2016, Breckenridge, CO, USA, October 2-7, 2016. 501-508.

Vera Valero, C.; Wever, N.; Bartelt, P., 2016: Coupling operational snowcover simulations with avalanche dynamics calculations to assess avalanche danger in high altitude mining operations. In: 2016: International snow science workshop proceedings 2016. International snow science workshop, ISSW 2016, Breckenridge, CO, USA, October 2-7, 2016. 159-164.

Vera Valero, C.; Wever, N.; Bühler, Y.; Stoffel, L.; Margreth, S.; Bartelt, P., 2016: Modelling wet snow avalanche runout to assess road safety at a high-altitude mine in the central Andes. Natural Hazards and Earth System Science, 16, 11: 2303-2323. doi: 10.5194/nhess-16-2303-2016

Bartelt, P.; Vera Valero, C.; Feistl, T.; Christen, M.; Bühler, Y.; Buser, O., 2015: Modelling cohesion in snow avalanche flow. Journal of Glaciology, 61, 229: 837-850. doi: 10.3189/2015JoG14J126

Buser, O.; Bartelt, P., 2015: An energy-based method to calculate streamwise density variations in snow avalanches. Journal of Glaciology, 61, 227: 563-575. doi: 10.3189/2015JoG14J054

Vera Valero, C.; Wikstroem Jones, K.; Bühler, Y.; Bartelt, P., 2015: Release temperature, snow-cover entrainment and the thermal flow regime of snow avalanches. Journal of Glaciology, 61, 225: 173-184. doi: 10.3189/2015JoG14J117

Feistl, T.; Bebi, P.; Christen, M.; Margreth, S.; Diefenbach, L.; Bartelt, P., 2015: Forest damage and snow avalanche flow regime. Natural Hazards and Earth System Science, 15, 6: 1275-1288. doi: 10.5194/nhess-15-1275-2015

Feistl, T.; Bebi, P.; Teich, M.; Bühler, Y.; Christen, M.; Thuro, K.; Bartelt, P., 2014: Observations and modeling of the braking effect of forests on small and medium avalanches. Journal of Glaciology, 60, 219: 124-138. doi: 10.3189/2014JoG13J055

Feistl, T.; Bebi, P.; Dreier, L.; Hanewinkel, M.; Bartelt, P., 2014: Quantification of basal friction for technical and silvicultural glide-snow avalanche mitigation measures. Natural Hazards and Earth System Science, 14, 11: 2921-2931. doi: 10.5194/nhess-14-2921-2014

Teich, M.; Fischer, J.-T.; Feistl, T.; Bebi, P.; Christen, M.; Grêt-Regamey, A., 2014: Computational snow avalanche simulation in forested terrain. Natural Hazards and Earth System Science, 14, 8: 2233-2248. doi: 10.5194/nhess-14-2233-2014