Comprehensive monitoring system on the Grohovo Landslide, Croatia

Abstract

The Grohovo Landslide, the largest active landslide along the Croatian part of the Adriatic coast, is located on the north-eastern slope of the Rjecina valley. During 19th and 20th century considerable instabilities on the Rjecina valley slopes occurred. The last complex landslide was reactivated in December 1996 and about 1.0x106 m3 moved down the slope and buried the Rjecina river-bed. In 2009 the Croatian-Japanese joint research project “Risk identification and Land-Use planning for Disaster Mitigation of Landslides and Floods in Croatia” was initiated and the Grohovo Landslide was chosen as a pilot area for monitoring system development. A comprehensive monitoring system was designed and installation of monitoring equipment started in March 2011 and it will be completed to the end of 2011. Integrated monitoring system will consist of survey using GPS and robotic total station. All measurements will be integrated in GIS for landslide risk management and early warning system.