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Advances in Hydrogeologic Framework of Floridan Aquifer System in Brooksville, FL

This presentation discusses the ongoing USGS study on the Floridan Aquifer System, focusing on middle confining units, hydrogeologic framework revisions, and planned products for better understanding of the system's properties and flow dynamics.

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Advances in Hydrogeologic Framework of Floridan Aquifer System in Brooksville, FL

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  1. Hydrogeologic Framework Discussions of the Floridan Aquifer System In Brooksville, FL 4/21/2011

  2. Today’s Agenda • Morning: I tell you what I know • Introduction (this presentation) • Middle Confining Units of the Floridan Aquifer System (probably more than you want to know) • Hydrogeologic Framework for Northeastern Florida and Southeastern Georgia • Hydrogeologic Discussion of Southwest and Central Florida and Tie-In to the South Florida Area • Afternoon: exchange of ideas

  3. Project Background • One of several current ongoing studies being conducted by the USGS Groundwater Resource Program (GWRP) • Began in Fall of 2009 • Project team members located across Southeastern U.S. • Several previous meetings have been held between USGS and local districts and states to keep you apprised of developments and important results

  4. Framework Revision RASA Framework • Focus on improving the physical geometry and understanding of the hydraulic properties of the system • Improve understanding of flow system needed to build numerical model • Active surficial • Salt-water encroachment 6 to 8 yrs New Framework 2 yrs

  5. Floridan Framework (our focus) Stratigraphy Aquifers and Confining Units Surficial Aquifer Upper Confining Unit** Floridan Aquifer System Extent* Top of System* Upper Floridan* Middle Confining Unit** Lower Floridan* Lower Confinement • Cretaceous System • Tertiary System • Paleocene Series • Eocene Series • Oligocene Series • Miocene Series • Post Miocene Will not be revised *Minor revision **Major revision

  6. Revised Hydrogeologic Framework Major Update • Middle confining units • Extent of each one • Configuration of top • Thickness of units • High T Zones • APPZ, FPZ, BZ • Location of freshwater/saltwater Interface

  7. Planned Products • Hydrogeologic Framework for the Floridan Aquifer System (Draft by Fall 2011) • Digital Structural Surfaces for the Floridan Aquifer System (follows main report) • Borehole geophysical logs used for the Floridan and Saline Mapping studies

  8. Getting feedback from you early • Very interested in what you think • Getting an exchange of ideas now is a lot better than waiting for a report to be published and then getting it • Do you have any new data that needs to be incorporated that is not yet out on the street? lesterw@usgs.gov

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