Hydrogeologic discussion of southwest and central florida and tie in to the south florida area
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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.

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Hydrogeologic discussion of southwest and central florida and tie in to the south florida area l.jpg

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

Lester J. Williams

4/21/2011


Outline l.jpg
Outline and Tie-In to the South Florida Area

  • 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)


Approach l.jpg
Approach and Tie-In to the South Florida Area

  • ROMP and deep exploratory well reports

  • Geophysical logs

    • Aquifers

    • Confining units

    • Transmissive zones

  • Aquifer Tests

  • Head Gradients

  • Cross Sections!!!


Why cross sections l.jpg
Why Cross Sections? and Tie-In to the South Florida Area

  • 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


Preliminary findings l.jpg
Preliminary Findings and Tie-In to the South Florida Area

  • 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


Basis for all my interpretations l.jpg
Basis for all my interpretations and Tie-In to the South Florida Area

next slide


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Reported “fractured zone” and Tie-In to the South Florida Area

Duncan and others zones

Pre-existing top markers

Low-porosity unit interpreted from geophysical logs

Water quality change


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Marked up log and Tie-In to the South Florida Area

  • Interpreted position of the confining units marked on logs

  • Other notations included

  • Then transferred to hand-drawn cross sections


Relation of stratigraphy to aquifers and confining units l.jpg
Relation of Stratigraphy to Aquifers and Confining Units and Tie-In to the South Florida Area

  • Original Scheme


Top of mcu i l.jpg
Top of MCU I and Tie-In to the South Florida Area

Revised 4/2011

Miller, 1986

“MCU IA”


Configuration of mcu i l.jpg
Configuration of MCU I and Tie-In to the South Florida Area

Revised 4/2011

Miller, 1986

“MCU IB”

This area MCU III


Old vs new l.jpg
Old vs. New and Tie-In to the South Florida Area

MCU IA

MCU IB

Green is Miller’s MCU I in both figures

Brown is the top of MCU IA and MCUIB respectively


Mcu ib in swfwmd area l.jpg
MCU IB in SWFWMD Area and Tie-In to the South Florida Area

Revised 4/2011


Configuration of mcu ii l.jpg
Configuration of MCU II and Tie-In to the South Florida Area

Revised 4/2011

Miller, 1986

MCU II


Mcuii l.jpg
MCUII and Tie-In to the South Florida Area

Green is Miller’s MCU II

Brown is the top of MCU II as revised 4/2011


Problem areas l.jpg
Problem Areas and Tie-In to the South Florida Area

  • 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


Summary l.jpg
Summary and Tie-In to the South Florida Area

  • 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