Mobile Public Alerting System in Log pod Mangartom
Topic of the practice
Monitoring and early warning system of landslides
Good Practice Information
In November 2000, a huge landslide was triggered below Stože and, in ten minutes travelled a distance of 4 km as debris flow to the village of Log. Approximately 1,000,000 m3 of material was displaced from an altitude of 1400 to 1600 m and mainly deposited at an altitude of 630 m. The consequences of the landslide, which, by its size (materials from an area of over 25 hectares were displaced and deposited over more than 15 hectares) is one of the largest in Slovene history, were catastrophic. 7 persons lost their lives, 6 residential and 7 farm buildings were completely destroyed, and another 12 buildings were more or less damaged. 29ha of forest was destroyed.With 2 bridges ruined, the road connection between Bovec and Predel, which is of vital importance to the area, was cut off.The road to Mangart was partially or fully buried beneath earth or destroyed, and considerable damage was also caused to power supply facilities. According to tests carried out so far, it is estimated that there is still approximately 3 million m3 of unstable material in the landslide area, which represents a potential danger of landslide recurrence. The elimination of consequences and the measures needed to ensure the safe return of inhabitants to their homes depends on the results of site investigations being performed in the landslide area.The damage in Log pod Mangartom is estimated to 36 mio EUR. Due to the high risk of landslide recurrence, a special mobile public alerting system was set up in Log pod Mangartom.The system was built in three phases. In the first phase, immediately following the disaster, an improvised, manually operated sirene system was installed. In the second phase, the improvised sirenes were replaced with mobile sirenes, which were linked to a uniform, remote-controlled system. In the third phase, an integral, automatic landslide detection system was installed. The system was designed at the Slovene Administration for Civil Protection and Disaster Relief, and constructed and set up by the companies Tegrad d.d. from Ljubljana and Pepra d.o.o. from Vrhnika.
Evidence of success
The early warning system and a regional notification centre is now functional.
Contact details to obtain further information on the practice
Mr. Zoran Kenda