Thames River Profiles

Continuous resistivity profiles along the Thames River, Norwich, Connecticut. Effective electrode spacing is 1.0 meter. Cooler colors represent regions of lower resistivity, and warmer colors regions of higher resistivity. The top profile is measured apparent resistivity pseudosection. The middle profile is an inverted resistivity model with no constraints on water depth or specific conductance after four iterations with a root-mean-square error of 11.6 percent. The bottom profile is an inverted resistivity model with constraints on water depth and specific conductance after four iterations with a root-mean-square error of 17.1 percent.