Induced polarisation survey at a waste site in southern sweden

Time-domain induced polarisation and apparent resistivity pseudosections were measured on a former waste site in Southern Sweden, just outside the city of Kristianstad. The landfill is still in service, except an approximately 400 m x 400 m area, which has been covered by a rather inhomogeneous layer of clay and clay till. Since the landfill is to become a green leisure area, the aim of the study was to be able to assess the thickness of that covering layer with good precision in order to guide the rehabilitation process. A grid of auger drillings, down to a maximum depth of 3 m and placed approximately every 50 m yielded punctual information on the stratigraphy of the material covering the waste, and was used as reference. Apparent resistivity and chargeability pseudo-sections were measured to get a continuous picture of the distribution of the material.