Characterization of a Landslide using Seismic Refraction, Electrical Resistivity and Hydrometer Methods, Adatepe—Çanakkale, NW Turkey

Author:

Bekler Tolga123,Ekinci Yunus Levent123,Demirci Alper123,Erginal Ahmet Evren123,Ertekin Can123

Affiliation:

1. Çanakkale Onsekiz Mart University, Faculty of Engineering and Architecture, Department of Geophysical Engineering, 17020, Çanakkale, Turkey

2. Çanakkale Onsekiz Mart University, Faculty of Sciences and Arts, Department of Geography, 17020, Çanakkale, Turkey

3. General Directorate of Mineral Research and Exploration, Department of Energy Resources Research and Exploration, 06800, Ankara, Turkey

Abstract

Seismic refraction and electrical resistivity surveys were carried out to characterize a landslide that occurred near the Çanakkale-Lapseki-Bursa highway, in northwest Turkey. Hydrometer analyses were also performed to highlight the composition of the slip surface material. The combined interpretation of the methods yielded the mass of the landslide body and the possible subsurface nature of a basal slip plane. Sediment-size fraction maps show that the slip surface material contained an excessive amount of clay. The clay-rich slipping layer was observed to a maximum depth of [Formula: see text] marked by a low [Formula: see text] resistivity zone, contrasting with the underlying sand-rich beds with relatively higher resistivities [Formula: see text]. A velocity variation ranging between [Formula: see text] also characterized this water-saturated slipping zone. Results indicated a buried failure surface under the studied shallow slide mass, which appeared to be a prolongation of the long upward-concave slip surface of the old landslide area to the east. Thus, future reactivations can be expected along basal slip surfaces of both recent and old landslide areas, which may pose a risk for the road structure and vehicular traffic along the active Çanakkale-Lapseki-Bursa highway.

Publisher

Environmental and Engineering Geophysical Society

Subject

Geophysics,Geotechnical Engineering and Engineering Geology,Environmental Engineering

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