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GEOELECTRIC MONITORING OF THE BREBU LANDSLIDE WITHIN THE MOLASSE AREA OF THE WALACHIAN CARPATHIANS
Abstract
Geophysical surveys are used frequently in the early stages of the landslide study, associated with the traditional drilling. But for monitoring the slide are used only the bore holes equipped with various sensors and expensive devices for movement measuring, which cannot be recovered and are destroyed once the slippery mass moves again. To continue the monitoring of the next stage of the landslide involves new drillings and a new set of devices. Finally the cost of monitoring will be very high. Initially, the Brebu landslide was the subject of a geophysical study using geoelectric and seismic soundings, followed by several shallow geotechnical drillings. Subsequently the evolution of the landslide was monitored only with geoelectric methods. The study aimed to test the possibility of monitoring the slippery mass movement using only these two geophysical methods. The research shows that the use of the geoelectric sounding (preferably together with seismic method) could provide satisfactory monitoring results, replacing the costly supplementary drilling boreholes and the use of the special monitoring equipment that cannot be retrieved for reuse.
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