f Detection of two-and three-dimensional objects buried at shallow depth using a high-frequency electromagnetic instrument

Shallow buried resistive or conductive objects can be detected either by resistivity sounding (using small electrode seperation) or by high-frequency electromagnetic profiling and/or sounding. A pipeline can be regarded as a 2-D object, while a small cavity as a 3-D resistive one. In this paper, the first experiencies obtained from the interpretation of the measurements performed by a radiofrequency (1 .78MHz) profiling instrument, EMS- 10D, are summarized.