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Slano Blato Landslide – Drone Observation


The Slano Blato Landslide, or the Salt Mud Slide, is a periodic landslide in Slovenia that is triggered approximately once a century. Although around 8,000 active landslides are present in Slovenia, the Slano Blato Landslide stands out as one of the most serious in terms of the damage it has caused. The landslide is located on the southern edge of the Trnovo Plateau of the Dinaric Alps, below Mount Čaven and Little Mountain (Mala gora) next to the Platna mountain pasture.


The landslide is approximately 1650m long and 250m wide with height differences of 380m. The objective was to monitor the changes in the land mass movement through several consecutive measurements.

Drone Flights

Ten drone flights at the height of 80m were needed to cover the whole area, mainly due to its considerable size. Ground control points were measured using a classical terrestrial geodetic technique.

We followed a traditional observation approach to assess the quality of photogrammetric measurements that were then used to define displacement vectors.