Water bottom electrical tomography in the river Tiber

WATER BOTTOM ELECTRICAL TOMOGRAPHY IN THE RIVER TIBER Luciana Orlando (Dept. Idraulica Trasporti e Strade “La Sapienza University”) and Luigi Tramonti (Freelance researcher) SUMMARY____________________________________________________________ The paper deals with electrical tomography performed on the Tiber river bottom with the goal of reconstructing the setting of sediments and characterising their lithologies. The data were acquired by a cable lying along the river bottom equipped with 24 electrodes set 1m apart and with Wenner dipole-dipole and Schlumberger spreads. The efficiency of electrical tomography was validated with 1D theoretical modelling performed with finite differences algorithm. We have obtained to constrain the uncertainties in the