NGI report
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Applied Avalanche Research in Norway: Fonnbu 50-year celebration
(NGI-Rapport;20230100-02-R, Research report, 2023-11-10)NGI’s avalanche research station at Strynefjellet in western Norway was officially opened in October 1973, and in September 2023 NGI and the AARN project invited to a 3- day celebration in Stryn. The aim of the celebration ... -
Årsrapport [FoU Snøskred 2012]
(NGI-rapport;20120031-01-R, Research report, 2013-02-01)Rapporten beskriver aktivitetene som er gjennomført i 2012 innenfor FoU prosjektet ”Snøskred” finansiert gjennom NVE. Prosjektet er delt inn i 4 hovedområder: - Modellering - Varsling - Sikringstiltak, herunder ... -
NVE Grasdalen snøforskning. Resultater av målinger på rør (0.42m dia). Vinterene 1979 til 1986
(Research report, 1987-07-01)Denne rapporten inneholder en kort beskrivelse av instrumenteringen på Røret, de malte stålspenningene gjennom vinterne 1979 til 1986, de Utregnede aksiallastene og bøyemomentene, samt en kort vurdering av resultatene. -
Pelefundamentering av kraftmaster og snøskredforbygninger i skrått terreng - Sluttrapport
(Research report, 1993-02-03)Prosjektet har gått ut på å undersøke muligheten av bruk av peler for å fundamentere snøskredforbygninger, kraftmaster oglignende konstruksjoner på løsmasser i bratt terreng. Siktemålet har først og fremst vært å gjennomføre ... -
Skredsøk ved bruk av magnetometer
(Research report, 2003)En innledende teoretisk analyse viser at den beste metoden for å detektere begravde ferromagnetiske gjenstander er ved å bruke to magnetometre montert i en fast avstand og å bruke forskjellen i måleverdi (gradienten) som ... -
Research Plan 2020–2022
(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 ... -
A Simple Model for the Variability of Release Area Size
(NGI-Rapport;20200017‐03‐TN, Research report, 2023-08-24)The hazard mapping tool NAKSIN estimates the release probability of potential release areas (PRAs) by testing a stability criterion based on the infinite-slope approximation with a large sample of synthetic weather situations. ... -
Annual Report 2020
(NGI-Rapport;20200017-02-R, Research report, 2021-03-19)During the first year of the project period 2020-2022 of NGIs research project on Snow avalanches, Applied Avalanche Research in Norway (AARN), work was conducted in all three work packages (WP 1 – Avalanche formation and ... -
APALI – Avalanche Probability Along Linear Infrastructure
(NGI-Rapport;20200431‐01‐TN, Research report, 2023-09-28)To secure linear infrastructure in the most cost-efficient manner, hazard hot-spots need to be known not only with regard to the intensity of possible events but also their probability. Traditional hazard mapping methods ... -
CPT 3 – Quantitative risk assessment: Remarks on the uncertainty in the delimitation of hazard zones based on historical observations
(NGI-Rapport;20200017-09-TN, Research report, 2022-03-22)The Norwegian building code regulates the societal acceptable risk from avalanches for three building classes (S1, S1, and S3). The corresponding highest allowed nominal annual probabilities of avalanches reaching the ... -
WP 2 – Full-scale experiments at Ryggfonn Ryggfonn avalanche observations 2019/2020
(NGI-Rapport;20200017-05-TN, Research report, 2021-03-22)NGI is operating the avalanche test site at Ryggfonn in Stryn municipality, Vestland county, western Norway (61.969°N, 7.275°E) since early 1980s. In addition to the field work and data collection in frame work of WP2, ... -
Annual Report 2021
(NGI-Rapport;20200017-03-R, Research report, 2022-04-08)During the second year of the project period 2020-2022 of NGIs research project on snow avalanches, Applied Avalanche Research in Norway (AARN), work was conducted in all three work packages (WP 1 – Avalanche formation and ... -
Research Plan 2023–2025
(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 ... -
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 ... -
Avalanche observations versus numerical avalanche model: Simple test of model performance
(NGI-Rapport;20200017-04-TN, Research report, 2021-03-22)Hazard assessment for landuse planning in snow avalanche prone areas requires, besides knowledge of return periods, the specification of expected runout distances. For a complete risk assessment, additionally, the intensity ... -
WP 2 – Full-scale experiments at Ryggfonn Ryggfonn avalanche observations 2020/2021
(NGI-rapport;20200017-06-TN, Research report, 2022-04-07)NGI continues to operate the avalanche test site at Ryggfonn in Stryn municipality, Vestland county, western Norway (61.969°N, 7.275°E). In addition to the field work and data collection performed in the context of WP2 – ... -
Annual Report 2019 [SP4 FoU Snøskred]
(NGI-rapport;20170131-17-R, Research report, 2020-05-28)NGI has conducted research on avalanches and related processes since 1973. This report gives a short insight in the work done in 2019. While experiments with artificial release of avalanches in the Ryggfonn experimental ... -
Annual Report 2018 [SP 4 FoU Snøskred]
(NGI-rapport;20170131-11-R, Research report, 2018-12-21)In the second year of the present three-year project period, core and/or long-term activities were continued: -experiments at Ryggfonn and maintenance of the site, -infrasound monitoring along State Road 15 between Fonnbu ... -
Annual Report 2017 [SP 4 FoU Snøskred]
(NGI-rapport;20170131-05-R, Research report, 2018-01-12)During the first year of the project period 2017–2019 of NGI's research project on snow avalanches, work was carried out in all five work packages (WP 1 – Ryggfonn and model development, WP 2 – Statistical tools, WP 3 – ... -
Field Survey of the 2017 Rigopiano Avalanche
(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 ...
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