Large mountain landslides

This product is a result of NVE taking over the state administrative responsibility for avalanches in 2009. The service is intended as an aid that makes it easier to obtain an overview of unstable mountain areas and associated consequences. Hazard and risk mapping is carried out by NGU on behalf of NVE. How the follow-up of the unstable rock lots and hazard zones should be followed up with monitoring and in land use planning is described in NVE report 77/2016: Hazard and risk classification of unstable mountain areas. Two databases have been established for the dissemination of the mapping and hazard areas. NVE’s database provides hazard zones for discharge areas and tidal waves, as well as potential containment areas and downstream floods as a result of dam fractures where applicable. NGU’s database focuses on the geological data, including motion measurements. NVE’s mapping is primarily aimed at existing buildings. When identifying and prioritising areas that need continuous monitoring, emphasis has been placed on where people live and reside within potentially avalanche-prone areas and areas affected by flood waves or dam/damage as a direct consequence of a rock slide. The database is a product of the mapping and hazard and risk classification performed. Together, this shall provide a basis for assessing measures in the form of monitoring with a view to alerting an upcoming rock slide and thereby avoiding potential loss of human life. The mapping provides important information about the degree of danger as a basis for land use planning.