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The risk of surficial landslide events arising increases wherever the combination of intense periods of rainfall, steep topography and
soil conditions are critical. Monitoring of the condition of the ground can provide valuable information for the risk assessment of potential
landslides. Prior to installing the instruments, a detailed site investigation is essential. Ideally, both monitoring and initial site
investigation should deliver high-resolution 3D spatial information about the soil conditions without creating disturbance such as artificial
paths of infiltration. An integrated investigation of a test site is presented. Results of geological, geophysical and geotechnical
methods are compared and used to derive an integrated model. In addition to geological studies and classical geotechnical testing including
dynamic penetration tests and analysis of soil samples, a geophysical investigation was carried out using electrical resistivity
tomography. The integrated model of the subsurface resulting from several complementary datasets suggests that this procedure is
very useful for optimising the design of a monitoring system, in terms of quality, cost efficiency and predictive capability of the hydro-
mechanical models derived from, or validated by, the planned monitoring system for areas likely to be subject to landslides.
Authors:Thielen, Andrea and Friedel, Sven and Plötze, Michael and Springman, Sarah M.
Index Terms:soil; rain fall; landslides; SoilGroup; ClayGroup; Friedel, Sven; Plotze, Michael; Springman, Sarah M.; Thielen, Andrea
Further Information:Date published: 2005