Geoelectrical imaging of slope deformations - towards repeated measurements, effective electrode array and limitations
Abstract
Use of geophysical methods within the research of the slope deformation became a standard during last decades. Electrical resistivity tomography (ERT), as one of the advanced geoelectrical methods, experiences boom in its utilization in numerous scientific fields, such as archaeology, geomorphology, engineering geology or hydrogeology.
The presented contribution deals with utilization of ERT on the various types of mass movements. Recognition of the processes that affect slope stability, predispose or trigger slope movements, is fundamental for both understanding of the slope development and effective rehabilitation of failing slopes or sliding mass.
Contribution points out (dis)advantages of the method, its limitations and related electrode array selection that can be crucial considering the required results. The choice of the appropriate electrode configuration always depends on the demanded resolution, depth range, and sensitivity to vertical/horizontal structures and, of course, on the overall purpose of each measurement.
Repeated measurements on landslides include range of difficulties that needs to be resolved. On the other hand, these practical experiences can help us to design a monitoring system based on repeated measurements.