f OPTIMIZING ERT SURVEYS FOR TUNNEL DETECTION

We consider the problem of designing an electrical resistivity tomography (ERT) survey that is best able to discriminate a subsurface target among a population of similar targets. The targets being considered are horizontal buried tunnels with circular cross sections. Potential target tunnels vary in their radius and depth but, they have a constant electrical conductivity. They are evaluated singly, embedded in a homogeneous background with a differing electrical conductivity.