Boyd, J. and Chambers, J. and Wilkinson, P. and Uhlemann, S. and Merritt, A. and Meldrum, P. and Swift, R. and Kirkham, M. and Jones, L. and Binley, A. (2019) Linking geoelectrical monitoring to shear strength - A tool for improving understanding of slope scale stability : 25th European Meeting of Environmental and Engineering Geophysics. In: 25th European Meeting of Environmental and Engineering Geophysics, 2019-09-08 - 2019-09-12.
Full text not available from this repository.Abstract
Landslides pose a risk to both infrastructure and wider society, managing the geohazard requires and understanding of factors driving slope instability, in particular the response to moisture content. Traditional methods of slope investigation involve discrete point geotechnical measurements which are not spatially sensitive. Recent studies have shown the spatial sensitivity of geoelectrical methods to both the internal geometry of unstable hill slopes and moisture dynamics, demonstrating their value in landslide investigation and characterisation. In this study we present the use of a geoelectrical monitoring system on an active landslide in Lias mudrocks, North Yorkshire, UK. Building on previous studies of the field site, subsurface resistivity distributions determined from time-lapse electrical resistivity tomography (ERT) are converted into shear strength estimates through calibration between electrical resistivity and matrix suction. Geotechnical parameters are determined from shallow borehole samples. Shear strength distributions show agreement with field observations of the slope, relatively low shear strength values (