Historically the primary focus of salt-water intrusion studies in south Florida has been the evaluation and protection of ground-water resources, which are the principal source of drinking water. Over the past decade environmental concerns related to restoration of the Florida Everglades have become equally important as the connection between the environment and the economy has been recognized. The current restoration activity is a very large and complex project. Resource managers are always looking for better modeling and forecasting tools to assist them as they develop, execute, and monitor restoration activities. Electromagnetic geophysical techniques are one means of cost effectively improving hydrologic property estimates for ground-water flow models.