Seminar by Clara Sena, Researcher, Department of Geosciences, University of Oslo, entitled:
Tension fractures can create aquifer barriers in the Åknes rockslide (Norway)
Summary:
Åknes rockslide is one of the seven high-risk unstable slopes continuously monitored by the Norwegian Water and Energy Directorate (NVE). Since 2017, NVE is investigating in more detail the groundwater conditions at Åknes in order to assess whether groundwater drainage will increase the stability of this rockslide. In a collaboration project between the UiO and NVE, we found that the groundwater recharge rate in the backscarp (located in the upper part of the rockslide) is much higher than in the rest of the unstable slope, due to the infiltration of surface runoff originated from the mountain ridge. In addition, tension fractures caused by the downward displacement of the unstable rockmass create groundwater barriers that sustain a high water table at high elevation in the rockslide.
NB! This lecture is only possible to participate digitally via videolink
Videolink to the lecture will be sent to the mailinglists alle@geo and geohyd-info@geo. If you want to subscribe to the geohyd-info@geo list send an email to Anita.
This lecture use Zoom | Download the Zoom Client for Meetings
About the seminar series
GeoHyd Lunch Seminars are for the time being fully-digital, following the corona guidelines.
This seminar is offered by the Section for Geography and Hydrology, Dept. of Geosciences, University of Oslo. The GEOHYD-seminars are announced as lunch seminars so bring your lunch if you want to.
The seminars are open for everyone interested, and especially students are welcome.
The Lunch Seminar Team
– Louise and Sigrid