1 / 18

Hydrogeologic Discussion of Southwest and Central Florida and Tie-In to the South Florida Area

Hydrogeologic Discussion of Southwest and Central Florida and Tie-In to the South Florida Area. Lester J. Williams 4/21/2011. Outline. Approach used for revising framework in central and southwest areas Discussion of the preliminary mapping Problem areas and things we need to discuss.

vernados
Télécharger la présentation

Hydrogeologic Discussion of Southwest and Central Florida and Tie-In to the South Florida Area

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Hydrogeologic Discussion of Southwest and Central Florida and Tie-In to the South Florida Area Lester J. Williams 4/21/2011

  2. Outline • Approach used for revising framework in central and southwest areas • Discussion of the preliminary mapping • Problem areas and things we need to discuss Finchs Cave, Marion Co. FL (A.M. Cressler)

  3. Approach • ROMP and deep exploratory well reports • Geophysical logs • Aquifers • Confining units • Transmissive zones • Aquifer Tests • Head Gradients • Cross Sections!!!

  4. Why Cross Sections? • Main reason is to enable us to build a 3D framework • Continuity of confining beds and permeability variations can be better understood • Very thick system with many different permeable zones and confining beds

  5. Preliminary Findings • Low-porosity beds comprising MCU I can be correlated into the eastern an southern part of SWFWMD; these include an upper thinner discontinuous zone and a lower thicker more continuous zone (informally designated as “MCU IA” and “MCU IB”) • MCU II is overlapped by MCU I along the eastern border and in the south areas of SWFWMD • MCU II consists of a very distinctive low porosity unit on geophysical logs, but is closely related and often confused with underlying MCU VI • Deeper MCUs also remapped and revised in area • Avon Park permeable zone forms on top of one or more of the following MCUs: MCU IA, MCU IB, MCU II

  6. Basis for all my interpretations next slide

  7. Reported “fractured zone” Duncan and others zones Pre-existing top markers Low-porosity unit interpreted from geophysical logs Water quality change

  8. Marked up log • Interpreted position of the confining units marked on logs • Other notations included • Then transferred to hand-drawn cross sections

  9. Relation of Stratigraphy to Aquifers and Confining Units • Original Scheme

  10. Top of MCU I Revised 4/2011 Miller, 1986 “MCU IA”

  11. Configuration of MCU I Revised 4/2011 Miller, 1986 “MCU IB” This area MCU III

  12. Old vs. New MCU IA MCU IB Green is Miller’s MCU I in both figures Brown is the top of MCU IA and MCUIB respectively

  13. MCU IB in SWFWMD Area Revised 4/2011

  14. Configuration of MCU II Revised 4/2011 Miller, 1986 MCU II

  15. MCUII Green is Miller’s MCU II Brown is the top of MCU II as revised 4/2011

  16. Problem Areas • Ocala Semi-Confiner • Avon Park Permeable zone • MCU VI • Proposed extension of this unit north • MCU VIII • Proposed extension of this unit north • Transmissive LF zones UF APPZ LF

  17. Summary • The middle confining units in central and southwest Florida have been revised from original framework • Changes proposed include: • Separate MCU I into two distinct units (IA & IB) • Slight changes to the extent of MCU II along its eastern edge • Deeper MCUs (VI) needs better definition • Include better definition of Avon Park Permeable zone using south Florida’s definition, it will be included in the Upper Floridan

More Related