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An electrical resistivity image profiling method has been used to characterize the Gürbulak landslide. This landslide is located in the province of Trabzon in Eastern Black Sea Region of Turkey. Primary attention was drawn to the determination of the thickness of the mobilized material, its possible slip surface and evaluation of the groundwater conditions related to the occurrence of the landslide. Electrical resistivity images have been carried out by the dipole-dipole array for data acquisition and least-squares method for data inversion. Transverse resistivity results are displayed as dept slices at different depths below the surface, which nearly yields a three-dimensional resistivity image. The resistivity results and the geological information of the landslide area suggest that the landslide body has different degrees of an altered material and a high degree of saturation, and its sliding surface is at a depth of about [Formula: see text].

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When natural slope is disturbed by human activity such as road construction and infrastructure, continuous landslide monitoring is important to prevent loss of material and life. Therefore, this study aims to determine the landslide material, the possible sliding surface and the influence of groundwater on the landslide occurrence. Low cost monitoring landslide is performed which is vertical electrical sounding (VES) and seismic refraction methods. The case study area is located in the district of Kısıklı (Antalya province) in the Mediterranean Region of Turkey. VES survey were performed using Schlumberger electrode array at six locations. VES results interpretation leads to detect of maximum five geoelectrical layers. First, second and third layers represent saturated and permeable layer, while fourth and fifth layers correspond to an impermeable layer. Seismic refraction measurements were carried out on three profiles. Low velocity and elastic parameters relatively correspond to the permeable materials in near surface with thickness about 4-5 m higher porosity. The integrated of VES and seismic surveys allow mapping the weathered material at depth and providing depth information of the sliding surface which occurs at a depth between approximately 5 m and 20 m.

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