Browsing Norges Geotekniske Institutt by Title
Now showing items 763-782 of 1234
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On pulsed Doppler radar measurements of avalanches and their implication to avalanche dynamics.
(Journal article, 2007)Pulsed Doppler radar measurements from several avalanche releases are analyzed to gain an in-depth understanding of avalanche dynamics. A pulsed Doppler radar emits short pulses and samples the echo in distinct time ... -
On snow avalanche flow regimes: Inferences from observations and measurements.
(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 ... -
On the characteristics of landslide tsunamis
(Journal article, 2015)This review presents modelling techniques and processes that govern landslide tsunami generation, with emphasis on tsunamis induced by fully submerged landslides. The analysis focuses on a set of representative examples ... -
On the computation of parameters that model snow avalanche motion
(Journal article, 1981)This paper explores the computational problem of finding suitable numbers to use in a twoparameter model of snow avalanche dynamics. The two parameters are friction, y, and a ratio of avalanche mass to drag, MID. Given a ... -
On the Effect of Shield Friction in Hard Rock TBM Excavation
(Peer reviewed; Journal article, 2023) -
On the Inference of Tsunami Uncertainties From Landslide Run-Out Observations
(Peer reviewed; Journal article, 2022) -
On the influence of overconsolidation effect on the compressibility assessment of subsoil by means of CPTU and DMT
(Peer reviewed; Journal article, 2016)The paper contains the analysis of the influence of overconsolidation effect on the values of constrained moduli, assumed by means of two most popular in situ advanced tests. The tested soils included two geological ... -
On the landslide tsunami uncertainty and hazard
(Peer reviewed; Journal article, 2020)Landslides are the second most frequent tsunami source worldwide. However, their complex and diverse nature of origin combined with their infrequent event records make prognostic modelling challenging. In this paper, we ... -
On the stress update algorithm of an advanced critical state elasto-plastic model and the effect of yield function equation
(Journal article, 2014)This paper investigates the computational performance of S-CLAY1S constitutive model by varying its yield function equation. S-CLAY1S is an advanced anisotropic elasto-plastic model that has been developed based on the ... -
Operational use of a snowpack model for the avalanche warning service in Switzerland : model development and first experiences
(NGI Publication;203, Chapter, 1998)The national Swiss avalanche warning service must provide high quality avalanche danger forecasts with an increasing spatial resolution. For this purpose, forecasters require objective tools to judge local and regional ... -
Oppdatert tiltaksplan for forurenset sjøbunn utenfor Elkem Carbon, Kristiansand
(NIVA-rapport, Research report, 2021)Denne rapporten er en oppdatering av NIVA-rapport 7276-2018 «Tiltaksplan for forurenset sjøbunn utenfor Elkem Carbon, Kristiansand» (Olsen og medarb. 2018). Basert på nye analyser og modellering er det presentert utforming ... -
Opportunity of detailing avalanche forecasts
(NGI Publication;203, Chapter, 1998)The national Swiss avalanche warning service must provide high quality avalanche danger forecasts with an increasing spatial resolution. For this purpose, forecasters require objective tools to judge local and regional ... -
Optimization and probabilistic calibration of avalanche block models
(Journal article, 2009)The Norwegian Geotechnical Institute (NGI) has been performing full-scale avalanche tests at Ryggfonn in western Norway for more than 30 years. During those years, measurements from about three dozen dry-snow avalanches ... -
Organic Content and Maturation Effects on Elastic Properties of Source Rock Shales in the Central North Sea
(Peer reviewed; Journal article, 2019)We investigate the effects of organic content and maturation on the elastic properties of source rock shales, mainly through integration of a well log database from the Central North Sea and associated geochemical data. ... -
Organic-rich shale caprock properties of potential CO2 storage sites in the northern North Sea, offshore Norway
(Peer reviewed; Journal article, 2020)Assessment of the geomechanical properties of organic-rich shale caprocks is critical for a successful CO2 storage into a saline aquifer. In this study, we investigated the geochemical properties of the organic-rich shale ... -
Outline of a Simple Model of Mixed Snow Avalanches
(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 ... -
Overrun length of avalanches overtopping catching dams: Cross-comparison of small-scale laboratory experiments and observations from full-scale avalanches
(Journal article, 2008)Results from small-scale and full-scale experiments on avalanche–dam interactions are presented and compared. These experiments were analyzed with respect to the overrun length (i.e., the distance that the avalanche traveled ... -
An overview of avalanche forecasting models and methods
(NGI Publication;203, Chapter, 1998)This overview resumes first the historical development of avalanche forecasting in different countries of the world. It yields the most basic definitions like "avalanche danger" and presents the major problems of avalanche ... -
An overview of natural hazard zoning with special reference to avalanches
(NGI Publication;203, Chapter, 1998)Natural hazards are increasingly a limiting factor in mountainous countries in connection with the growing population and economical development. People become more and more estranged to environmental conditions and are ... -
Overview of soft ground TBM performance
(Chapter, 2023)