Combined Use of Frequency-Domain Electromagnetic and Electrical Resistivity Surveys to Delineate the Freshwater/Saltwater Interface near Saline Lakes in the Nebraska Sand Hills

We investigate the use of frequency-domain electromagnetic (FDEM) and electrical resistivity<br>(ER) surveys for rapid and detailed characterization of the direction of lake-aquifer fluxes and the<br>configuration of salt plumes generated from saline lakes. This methodology was developed and applied<br>at several lakes in the Nebraska Sand Hills, Nebraska, in an area with both freshwater and saline lakes<br>hydraulically connected to the freshwater surficial aquifer.