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Groundwater 101 Groundwater Impacts During Drought

NIDIS – Middle ACF Meeting – May 18,2010 . Groundwater 101 Groundwater Impacts During Drought. Topics. Introduction – Questions about groundwater? Recharge , Surface Water, Groundwater Interactions Major Georgia Aquifers and Recharge Areas

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Groundwater 101 Groundwater Impacts During Drought

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  1. NIDIS – Middle ACF Meeting – May 18,2010 Groundwater 101Groundwater Impacts During Drought

  2. Topics • Introduction – Questions about groundwater? • Recharge, Surface Water, Groundwater Interactions • Major Georgia Aquifers and Recharge Areas • Surface/groundwater interactions in varying geologic conditions • Groundwater level response to drought – recent examples

  3. Conceptual Model of Groundwater Flow and Stream-Aquifer Interaction

  4. Conceptual Model of Groundwater Flow and Stream-Aquifer Interaction Source: USGS Circular 1139

  5. Major Aquifers and Aquifer Systems

  6. Piedmont Aquifer– Fracture Flow Dominated Source: USGS OFR96-483

  7. Middle ACF – Cretaceous Aquifer Source: USGS OFR96-492

  8. Lower ACF – Typical Floridan Source: USGS OFR95-321

  9. Georgia Groundwater Recharge Areas Source: Georgia Geologic Survey

  10. ACF Groundwater Recharge Areas Source: Georgia Geologic Survey

  11. Statewide Groundwater Monitoring Network, GA 2008 • USGS Network • About 180 continuously monitored wells (29 in real time) • About 20 synoptic wells measured bimonthly • EPD is cooperator on 137 wells • Other cooperators include: • City of Brunswick and Glynn County; Albany WG&L; City of Lawrenceville; Lee County; Flint River Planning and Policy Center; and, McIntosh County

  12. Groundwater Monitoring Network Source: USGS Groundwater Watch

  13. Online Data

  14. Summary Statistics & Maps for Prior Yrs. Source: USGS SIR 2009-5070

  15. Surficial Aquifer Source: USGS SIR 2009-5070

  16. UFA: Southwestern Area Source: USGS SIR 2009-5070

  17. UFA: Southwestern Area (Albany) Source: USGS SIR 2009-5070

  18. Claiborne/Gordon Aquifer Source: USGS SIR 2009-5070

  19. Clayton Aquifer Source: USGS SIR 2009-5070

  20. Cretaceous Aquifer System Source: USGS SIR 2009-5070

  21. Crystalline-rock Aquifers Source: USGS SIR 2009-5070

  22. Conclusions • Almost all aquifers affected by drought during recent event • Various factors contribute to drought response time in aquifer • Aquifer type • Proximity to recharge areas • Type of recharge and flowpath - “flashiness” of aquifer • Compounding usage/issues (ag, municipal, over-usage, etc.) • Water conservation/reuse • Recent drought showed rate of decline increased as drought progressed

  23. Thank You - Questions? For More Information Contact: Joe Volpe Golder Associates Inc. Atlanta, GA jvolpe@golder.com www.golder.com

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