2D electrical resistivity imaging of some complex landslides in Lucanian Apennine chain, southern Italy

Abstract

We use high-resolution electrical resistivity imaging to delineate the geometry of complex landslides in the Lucanian Apennine chain of southern Italy, to identify the discontinuity between the landslide material and bedrock, and to locate possible surfaces of reactivation. The Lucanian Apennine chain is characterized by high hydrogeological hazard and shows a complete panorama of mass movements. In this area, all typologies of landslides markedly predisposed and tightly controlled by the geostructural characteristics, are found: rotational and translational slides, rototranslational slides, earth and mudflows, as well as deep-seated gravitational slope phenomena with a predominance of rototranslational slides evolving as earthflow slides. Three test sites, characterized by complex geology and a high hydrogeologic hazard, are studied. The Giarrossa and Varco Izzo earthflow slides are located to the west and east of the town of Potenza, whereas the Latronico slide is located close to the town of Latronico. Electrical images are produced from dipole-dipole geoelectric data acquired along arrays spanning selected profiles positioned perpendicular and parallel to the landslide bodies. High-resolution electrical resistivity images are attained through the use of geologic and borehole constraints in the interpretation phase. Integration and comparison of our results with other geophysical data delineate the geometries and hydrologic characteristics of the landslide structures.

Near surface geophysics techniques and geomorphological approach to reconstruct the hazard cave map in historical and urban areas

“…It has been applied for investigating areas of complex geology, such as volcanic and geothermal areas (Di Maio et al, 1998), seismotectonic structures (Caputo et al, 2003;Nguyen et al, 2005), and areas affected by hydrogeologic phenomena and environmental problems (Ogilvy et al, 1999;Lapenna et al, 2005;Soupios et al, 2007;Georgaki et al, 2007;Naudet et al, 2008). It has been also used to locate cavities in the subsoil (El-Qady et al, 2005;Gibson et al, 2007;Crawford et al, 2007;Mitrofan et al, 2008;Soupios et al, 2008).…”

Geophysical and Geotechnical Investigations of a Landslide in Kekem Area, Western Cameroon

“…Two main situations can potentially occur: 1) the geophysical contrast is related to a lithological change [1,2]; 2) the movement takes place within a homogeneous geological layer, but alters its physical characteristics. In this case, the geophysical contrast exists between the moving mass and the unaffected consolidated mass [3][4][5][6]. The geophysical contrast is then related to the cumulated or individual effects of the mechanical dislocation, the alteration and/or the increase of water content.…”

Investigation of subsurface for construction purposes in Makurdi, Benue State, Nigeria, using electrical resistivity method

“…The differences in electrical properties are investigated and analyzed to delineate underground structures. Due to high spatial resolution, relatively fast field data acquisition time and low cost, the geoelectric methods have been employed by several researchers in studying the subsurface structures (Griffiths and Barker, 1993;Lapenna et al, 2005;Soupios et al, 2006;Alhassan et al, 2015). This study will help in determining the nature and properties of the subsurface for proper foundation design and solving problems associated with the construction of various civil engineering purposes.…”