(I) Application of geophysical methods to problems in hydrology. Effects of water saturation on the physical properties of rocks. Use of geophysical methods in the exploration, development and production of groundwater, groundwater surface water interaction, snow and ice as a water resource, delineation of groundwater contamination, and mapping of saltwater intrusion. Introduction to the equations governing groundwater flow. Application of inversion to geophysical data to estimate hydrologic parameters.Prerequisite: GPGN 409. 3 hours lecture; 3 semester hours.