Page 32 - Industrial Plants

Fig. 2 - Map of electrode lines realized

Fig. 3 - Acquisition scheme for longitudinal lines

Fig. 4 - Multigradient array (C: Current electrode; P: potential electrode)

cables on the bottom, have been performed under in an investigative depth of 55-60 m under the seabed.
control of specialized personnel (divers), see Figure In order to have as high a resolution of the survey as
2 and Figure 3. possible and also increase the depth of investigation,
In our case, the survey was aimed to the reconstruction the multicore cables will be laid to the seabed, with the
of the lithological variations of the sector of interest, help of geologist’s divers. In the measurements a
and, in particular, to the identification of the calcareous multigradient array was used, which has a good
substrate and to identify any cavities and highly karsted sensitivity compromise between the perception of
areas. An electrode spacing of 5.0 m and a depth of vertical and lateral variations of underground resistivity.
investigation of 55-60 m have been planned. With an In addition, this array allows the acquisition of multiple
electrode spacing of 5.0 m, using 64 electrodes, results measurements simultaneously (up to eight), allowing

IndustrIal Plants - May 2022
30