A fast and accurate numerical approach for electromagnetic inversion

This paper deals with the solution of Maxwell's equations to model electromagnetic fields in case a layered earth. The integrals involved are approximated by means novel approach based on splitting reflection term. inverse problem, consisting computation unknown underground conductivity distribution from set modeled magnetic field components, is also considered. Two optimization algorithms applied, line- and global-search methods, new minimization presented. Several EM surveys ground surface simulated, considering horizontal coplanar (HCP) perpendicular (PRP) dipolar configurations. numerical experiments, carried out for study river-levees integrity, allowed estimate errors associated these kind investigations, confirm reliability technique.