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Paleozoic Karst Aquifers in the Mid-Continent

Paleozoic Karst Aquifers in the Mid-Continent. Biscayne Aquifer (Pleistocene) Floridan Aquifer (Tertiary) Edwards Aquifer (Cretaceous) Permian (Roswell in NM and Blaine in TX) Mississippian Silurian Cambrian-Ordovician (Nashville and Lexington, Ozarks, Arbuckle Mtns in OK)

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Paleozoic Karst Aquifers in the Mid-Continent

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  1. Paleozoic Karst Aquifers in the Mid-Continent

  2. Biscayne Aquifer (Pleistocene) Floridan Aquifer (Tertiary) Edwards Aquifer (Cretaceous) Permian (Roswell in NM and Blaine in TX) Mississippian Silurian Cambrian-Ordovician (Nashville and Lexington, Ozarks, Arbuckle Mtns in OK) Paleozoic Karst in the Appalachians

  3. Michigan basin Illinois basin Finlay arch Cincinnati arch Lexington dome Nashville dome Mississippi embayment Wisconsin arch Ozark plateau

  4. Important Hydro-Geomorphic Features in Karst Aquifers • Sinkholes: Recharge, ground stability • Estevelles: Recharge and discharge • Vertical fractures w/dissolution: Recharge/discharge • Epikarst: Storage • Solution channels: water pathways; high velocity flow • Springs: Focused discharge

  5. Sinkholes and Estevelles

  6. First-order spring. Discharge > 100 cfs Springs

  7. Vertical fractures and faults

  8. Conceptual Models

  9. Depth to saline ground water

  10. Conceptual model for Paleozoic Karst Aquifer, Based on Mammoth Cave Area, KY

  11. Fundamental difference in physics of flow Modeling Flow in Karst Conduits • Porous Aquifer, Darcy: • Conduit, Manning: Hr: hydraulic radius=x-section area/wetted perimeter n = wall roughness Conduit geometry and wall roughness highly variable —how to determine in the field for an aquifer?

  12. Ozark Plateau Aquifer System

  13. Geology

  14. Thickness of Springfield Aquifer Thickness of Ozark Aquifer

  15. Regional potentiometric surface on Ozark Plateau and Western Interior Aquifer System

  16. Cross-section on NW side of Ozark Plateau. Fresh water mixes with saline water in laterally equivalent units deeper in basin.

  17. Potentiometric surface in Ozark Plateau in Missouri

  18. 330 Mgpd

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