Blar i Norwegian Geotechnical Institute (NGI) Digital Archive på forfatter "Issler, Dieter"

Viser treff 21-40 av 50

    • Dynamical Aspects of the 2017 Rigopiano Avalanch 

      Issler, Dieter (NGI-rapport;20170131-08-TN, Research report, 2019-01-21)
      Abstract: Data on the disastrous snow avalanche that occurred on 2017-01-18 at the spa hotel Rigopiano, municipality of Farindola in the Abruzzo region of central Italy, are analyzed in the present Technical Note in different ...

    • Dynamical Consistency Constraints on Entrainment and Deposition in Depth-Averaged Models of Snow Avalanches and Other Gravity Mass Flows 

      Issler, Dieter (NGI-rapport;20110112-00-1-TN, Research report, 2012-05-18)
      This paper discusses several issues related to the mathematical and physical formulation of entrainment in depth-averaged models of gravity mass flows (GMF) such as snow avalanches and landslides. (i) The relation between ...

    • Dynamically consistent entrainment laws for depth-averaged avalanche models 

      Issler, Dieter (Journal article; Peer reviewed, 2014)
      The bed entrainment rate in a gravity mass flow (GMF) is uniquely determined by the properties of the bed and the flow. In depth-averaging, however, critical information on the flow variables near the bed is lost and ...

    • Dynamique et modélisation des avalanches 

      Issler, Dieter (Chapter, 2010)
      This chapter summarizes observations and experimental findings on the dynamics of snow avalanches that are important to understand when developing or applying numerical models for the calculation of runout distances, ...

    • Emerging insights into the dynamics of submarine debris flows 

      Elverhøi, Anders; Issler, Dieter; De Blasio, Fabio V.; Ilstad, Trygve; Harbitz, Carl Bonnevie; Gauer, Peter (Journal article, 2005)
      Recent experimental and theoretical work on the dynamics of submarine debris flows is summarized. Hydroplaning was first discovered in laboratory flows and later shown to likely occur in natural debris flows as well. It ...

    • Exploring the significance of the fluidized flow regime for avalanche hazard mapping. 

      Issler, Dieter; Gauer, Peter (Journal article, 2008)
      Observational and experimental evidence suggests that it is important to explicitly account for the fluidized flow regime in avalanche hazard mapping due to its high mobility, intermediate density and high velocity. We ...

    • Field Survey of the 2017 Rigopiano Avalanche 

      Issler, Dieter (NGI-rapport;20170131-02-TN, Research report, 2019-12-26)
      In the evening of January 18, 2017, a large snow avalanche descended from the east flank of Monte Siella in the municipality of Farindola in the Abruzzo region of Italy. It completely destroyed the Hotel Rigopiano and ...

    • Inferences on flow mechanisms from snow avalanche deposits 

      Issler, Dieter; Errera, Alessia; Priano, Stefano; Gubler, Hansueli; Teufen, Bernardo; Krummenacher, Bernhard (Journal article, 2008)
      The deposit structure of 20 very small to large avalanches that occurred in the Davos area, eastern Swiss Alps, during winters 2004/05 and 2005/06 was investigated. Snow-cover entrainment was significant in the majority ...

    • Inferences on Mixed Snow Avalanches from Field Observations 

      Issler, Dieter; Gauer, Peter; Schaer, Mark; Keller, Stefan (Peer reviewed; Journal article, 2019)
      Observations of the deposits, flow marks, and damages of three mixed-snow avalanches of widely different size were analyzed with regard to flow regimes, velocities, pressures, densities, flow depths, erosion modes, and ...

    • Interplay of entrainment and rheology in snow avalanches: a numerical study 

      Issler, Dieter; Pérez, Manuel Pastor (Journal article, 2011)
      A one-dimensional evolution equation for the slope-normal velocity profile of a streamwise uniform avalanche over an entrainable bed is derived. The boundary conditions are no slip at the bed, a stress-free surface and ...

    • Landslide Material Control on Tsunami Genesis ‐ The Storegga Slide and Tsunami (8100 y BP) 

      Kim, Jihwan; Løvholt, Finn; Issler, Dieter; Forsberg, Carl Fredrik (Peer reviewed; Journal article, 2019)
      Tsunami generation from sub‐aqueous landslides is controlled by landslide kinematics, which in turn is governed by the material properties of the slide mass. Yet, the effect of the material properties on tsunami‐genesis ...

    • Notes on the Fluidization of Snow Avalanches by Air Expulsion from the Snow Cover 

      Issler, Dieter (NGI-rapport;20140053-03-TN, Research report, 2017-02-03)
      A recently proposed mechanism for fluidization of the front of dry-snow avalanches, based on air escaping from the snow cover that is compressed under the weight of the avalanche (Issler, 2013) is discussed.

    • On full-scale avalanche measurements at the Ryggfonn test site, Norway. 

      Gauer, Peter; Issler, Dieter; Lied, Karstein; Kristensen, Krister; Iwe, H.; Lied, Erik; Rammer, L.; Schreiber, H. (Journal article, 2007)
      Avalanche measurements carried out at the Ryggfonn test site, Norway, during several winter seasons are analyzed with emphasis on recognizing different flow regimes and estimating flow densities. Measurements include impact ...

    • On snow avalanche flow regimes: Inferences from observations and measurements. 

      Gauer, Peter; Issler, Dieter; Lied, Karstein; Kristensen, Krister; Sandersen, Frode (The International Snow Science Workshop (ISSW) Proceedings;, Chapter, 2008)
      Mixed dry-snow avalanches are commonly thought to consist of a dense core and a dilute suspension layer, even though observations and measurements from Canada and Russia have long indicated the presence of an intermediate-density ...

    • Outline of a Simple Model of Mixed Snow Avalanches 

      Issler, Dieter (NGI-Rapport;20200017‐10‐TN, Research report, 2023-08-24)
      This Note discusses a quasi-three-dimensional model of mixed snow avalanches that could replace the code MoT-Voellmy in NAKSIN. As a starting point, the two-layer model by Eglit is slightly simplified and extended from a ...

    • Perspectives on snow avalanche dynamics research 

      Nishimura, Kouichi; Barpi, Fabrizio; Issler, Dieter (Peer reviewed; Journal article, 2021)

    • Possible erosion mechanisms in snow avalanches 

      Gauer, Peter; Issler, Dieter (Journal article, 2004)
      Snow erosion and entrainment processes in avalanches are classified according to their mechanisms, the flow regimes in which they occur, and their spatial position within the avalanche. Simple, but process-specific, models ...

    • Remote Identification, Characterization and Monitoring of Erosional Processes 

      Salazar, Sean E.; Hormes, Anne; Issler, Dieter (NGI Rapport;20170031-03-R, Report, 2018-03-21)
      Remote sensing techniques and geophysical techniques have enabled the collection of vital information on geotechnical, hydrogeological, and environmental processes. These techniques may offer improvements over traditional ...

    • Research Plan 2020–2022 

      Issler, Dieter; Jaedicke, Christian; Gauer, Peter; Gisnås, Kjersti; Frauenfelder, Regula; Salazar, Sean (NGI-Rapport;20200017-01-R, Research report, 2020-04-23)
      Snow avalanches are a significant natural hazard and common phenomenon in Norway. Each year, avalanches result in fatalities, evacuations, and interruptions or damage to infrastructure networks such as roads, railways, and ...

    • Research Plan 2023–2025 

      Tregaskis, Callum; Jaedicke, Christian; Gauer, Peter; Gisnås; Robinson, Kate; Issler, Dieter; Salazar, Sean; Vicari, Hervé; Frauenfelder, Regula (NGI-Rapport;20230100-01-R, Research report, 2023-05-19)
      Snow avalanches are a frequent and significant natural hazard in Norway. Each year, avalanche events result in fatalities, evacuations, interruptions, and damage to infrastructure networks such as roads, railways, and ...