Erosion and mass transport play a significant role, especially in canalized terrain forms. Climate change is assumed to lead to more heavy rain, which in turn will probably mean that landslides and floods occur more frequently, and that the landslides and debris flow can become larger and severe.
This ultimately affects the consequences of such incidents, in that the landslides become more harmful, and they may occur in areas where no landslides have occurred before. Landslides and floods can damage infrastructure, roads, buildings and people as a result of large volume of debris material, high speed and long range.
NGI develops a methodology for mapping areas with a risk of landslides and floods. The maps are used as a basis for assessing and designing measures that reduce the risk of loss of life and property damage. We also carry out analyses of landslide outlets and design of necessary mitigation, as well as geotechnical design of protection measures right up to the construction phase.
NGI provides the following services related to landslides, floods and debris flows:
- Danger zone and caution mapping
- Risk-and vulnerability analysis
- Design and engineering of mitigation measures
- Assessment of effects related to climate change and climate adaptation
- Transfer of knowledge to municipal authorities.
Research and development
The research effort at NGI related to landslides and debris flow covers the following topics:
- Mapping, identification and quantification of the degree of danger and consequence for areas that are potentially exposed to landslides
- Impact of climate change on landslides
- Development of methods for monitoring, warning and protection against avalanche danger
- Calculation of outlet distance of landslides
- Research on the effect of precipitation for the triggering of landslides in natural slopes.
NGI is a partner and one of the institutions that perform R&D tasks in Klima 2050 (2015-2022), a centre for research based innovation (SFI) funded by the Research Council of Norway. NGI leads the work package that deals with "water-triggered landslides", landslides triggered by precipitation in the form of rain and snowmelt. In the period 2002-2012, NGI led the INTERNATIONAL CENTER for GEOHAZARDS (ICG), one of Norway's first "Centers for Outstanding Research" (SFF). The centre carried out research to assess risk, as well as measures to prevent and reduce damage as a result of geohazards, such as all types of landslides, tidal waves / tsunamis, earthquakes and vibrations.