Transient Electromagnetic Sounding Data

This data set contains time-domain electromagnetic (TEM) soundings collected at 63 sites in and near Everglades National Park. The data set includes the sounding name, date measured, location information in the form of a descriptive location, zone 17 UTM coordinates, and latitude and longitude, transmitter loop size [meters], and location of receiver coil with respect to the center of the transmitter loop, layered-earth model best fitting the data. This includes the layer resistivity [ohm-meters] and layer thickness [meters]. Also included is the percentage rms misfit error between the observed and calculated apparent resistivity of the model.

The purpose of the work was to locate the freshwater-saltwater interface (FWSWI), and to provide data used to remove calibration errors in helicopter electromagnetic data. These data can be used to estimate formation resistivity as a function of depth to depths of up to 100 meters below the surface. This information is a value in determining if the aquifer is freshwater or saltwater saturated.