The OAL-Austria is located south of the town of Wattens in Tyrol (Austria). It is characterized by a deep-seated gravitational slope deformation (DSGSD), which has recently shown active movement in the order of 4cm/a. The landslide continuously threatens several buildings, infrastructure, and managed forests and farm land. These elements at risk are situated on top of the active landslide, bearing the impacts of the continuous movement. Furthermore, if the foot slope of the landslide collapses (again), it could dam up the Watten river and may cause severe damage in the town of Wattens.
Landslide at lower Watten Valley (5 km²)
MOTIVATION FOR CHOICE ACCORDING TO HAZARD EXPOSURE AND ASSET VALUE
– Gravitational landslide
– Deep-seated gravitational slope deformation active in the past decades
– Houses, infrastructure and farm land
– Mitigation measures have not been effective
POSSIBLE NATURE-BASED AND HYBRID SOLUTIONS
– Reduction of surface runoff by drainages
– Controlled discharge of near surface interflow using fascines
– Snow fences for controlled accumulation of snow and melt water drainage
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