Gilbert Barth specializes in hydrologic investigations assessing subsurface flows and the exchange between surface water and groundwater systems. His expertise includes a wide range of field, laboratory, analytical, and numerical techniques that he uses to develop conceptual models of flow, evaluate surface/groundwater interaction, and identify contaminant risks. In the past he has worked with CADSWES, the USGS, and the National Academy of Science; taught at the graduate level; and worked in the private sector for a range of employers including S.S. Papadopulos & Associates for the past 10 years.