Fitts, Charles R.: - Charles R. Fitts is a professor at the University of Southern Maine with research interests in hydrogeology, contaminant migration, and applied mathematics. He earned an MS in engineering geology at Cornell and a PhD in civil engineering at the University of Minnesota. He has consulted for various geotechnical and groundwater companies, and is author of several groundwater modeling software packages: AnAqSim (analytic aquifer simulator) and TWODAN for groundwater flow, and SOLUTRANS for solute transport.