Geophysical techniques applied to investigate underwater structures

The need to investigate underwater structures leads to study the capability of geophysical methods to analyze the physical behavior of the subsoil in water saturated conditions. Ground penetrating radar and electrical resistivity methods are well suited to localize and identify underwater structures but these methods are affected by some limitations that are analyzed in laboratory where an underwater archaeological site was simulated. GPR and ERT are applied and the results with the two techniques are compared and discussed.