Douglas W. Durden

• Approximation of relative contributions of various entities to the overall drawdown in the upper Floridan aquifer of the potato-growing region in St. Johns and Putnam Counties, Florida
• Estimates of regional drawdowns in the potentiometric surface of the upper Floridan Aquifer of northeast Florida using a numerical drawdown model
• Finite-difference simulation of the Floridan aquifer system in northeast Florida and Camden County, Georgia
• Regional characterization and assessment of the potential for saltwater intrusion in northeast Florida and Camden County, Georgia, using the sharp-interface approach