New Achievements In Developing A High Speed Geoelectrical Monitoring System For Landslide Monitoring (Geomonitor2D)

Landslides are one of the major threats to human settlements and infrastructure, causing over time enormous human suffering and property losses than any other geological hazard. Therefore much effort has to be centred on risk detection, risk reduction and development of timely warning systems to prevent future loss of life and property. During recent years the dc-geoelectric method has been used widely to investigate the structure of landslide areas, thus gaining the status of a state-of-the-art-method in civil engineering for this. However so far the dc-geoelectric method was hardly used to detect structural changes with time in active landslide areas. Within this talk we present the development of an innovative, high speed geoelectrical monitoring system, which allows remote controlled automatic measurements of geoelectric pseudo-sections. Each section, using a new kind of configuration, consists of 3000 single measurements, each one sampled for 1000 times. The acquisition time for such a section is about 30 minutes thus allowing to derive a point shot of the subsurface structure. This system was installed on an active landslide area. Within a period of two years, 6 pseudosections were measured each day. The results within this monitoring period will be discussed.