Monitoring of the Belca rockfall

This paper reviews the monitoring of the rock block above the forest road of Belca Jepca near the village of Belca in the municipality of Kranjska Gora, Slovenia. A rockfall in part of the block occurred in autumn 2014. Both classic and some new measurement technologies were used. The new technologies were implemented according to new findings: an unmanned aircraft was used in the hazardous and hardly accessible areas of the observation, a terrestrial laser scanner was used for the comprehensive observation of the rock slopes and large cracks were observed with the installation of invar wires. The deformation analysis uses data between 2014 and 2017, among which airborne laser scanning (ALS) data from 2014 is included. The study also includes a comparison of the airborne laser scanning and the terrestrial laser scanning. used: surveys using wire extensometers, tachometry and terrestrial laser scanning (TLS). We have also acquired lidar data from the summer of 2014, using airborne laser scanning (ALS), showing the status of the area before the rockfall. The analysis of the acquired data covers the period from 2014 to 2017. The aim of this research was to assess the risk of another rockfall, as well as finding a solution to achieve the safety and transportability of the road. We have used both classic and the latest measurement technology. In hard-to-reach areas, an unmanned aircraft was used for the observation, while a terrestrial laser scanner was used to comprehensively monitor the