Field trip: The Kostanjek Landslide Field Laboratory for Landslide Monitoring

Saturday, 9 March 2013, 9:00-12:30 (Podsused, the Western Suburb of the City of Zagreb)

The meeting point for the field trip was in the front of the Faculty of Mining, Geology and Petroleum Engineering (Pierottijeva 6). Transportation to the main monitoring station at the Kostanjek landslide was organized by vans of the Public Fire Command of the City of Zagreb. The general design of comprehensive integrated real-time monitoring system of the Kostanjek landslide was briefly presented at the site.

Based on the joint research in the frame of the Croatian-Japanese project ‘Risk Identification and Land-Use Planning for Disaster Mitigation of Landslides and Floods in Croatia’, the monitoring system on the Kostanjek Landslide was designed to include a number of different types of instruments communicating in near–real time to a data acquisition-processing center located at the Faculty of Mining, Geology and Petroleum Engineering, University of Zagreb (UNIZG-RGNF). An integrated monitoring system will finally consist of approximately 40 sensors for geodetic and geotechnical monitoring. The equipment for landslide monitoring at the surface and in the underground will include: 15 precise GNSS rovers, 9 long-span and short-span extensometers, vertical inclinometer, 3 pore pressure gauges in boreholes, 3 water level gauges in wells, rain gauge, weather station and 7 accelerometers aimed at monitoring landslide triggering factors. The installation of the system started in November 2011 and will be finished in 2013. The system is meant to improve or contribute to public safety, public education, scientific research, and university education.

The system is designed to measure changes in conditions that affect the possibility to reactivate sliding from slope cuts of abandoned open pit mine in Podsused and its vicinity, and to provide early warning of extreme conditions to authorities responsible for emergency preparedness. The public education role involves raising the level of awareness of the general public regarding natural hazards and their potential impacts. The scientific research role of the system is to provide long-term monitoring data that can be used to gain a better understanding of the mechanisms associated with landslide in hard soil-soft rock (Pannonian and Sarmatian marl), and to advance the development of technology in landslide monitoring. Finally, a monitoring system that is located at the UNIZG-RGNF has the potential to increase educational potential of the University of Zagreb, and therefore increase national educational capacities.