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Stream Depletion by Ground Water Pumping

Stream Depletion by Ground Water Pumping. Garey A. Fox, Derek M. Heeren, and Michael A. Kizer Biosystems and Agricultural Engineering Oklahoma State University. 2010 Oklahoma Water Research Symposium, October 26, 2010, Norman, OK. Streams and Alluvial Aquifers

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Stream Depletion by Ground Water Pumping

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  1. Stream Depletion by Ground Water Pumping Garey A. Fox, Derek M. Heeren, and Michael A. Kizer Biosystems and Agricultural Engineering Oklahoma State University 2010 Oklahoma Water Research Symposium, October 26, 2010, Norman, OK

  2. Streams and Alluvial Aquifers Hydraulically connected – a single resource Ground water pumping adjacent to rivers depletes streamflow (“alluvial well depletion”) Research Question: Is alluvial well depletion significant in OK rivers? Critical Water Issue Stream Leakage into the Alluvial Aquifer

  3. Controlling Factors • Aquifer Properties: • T (or K), Sy • Pumping Well: • L, Q • Stream: • Ksb • Penetration Idealizations of Alluvial Well Pumping Adjacent to a Stream

  4. Study Site North Canadian River

  5. Determine typical hydrogeologic cross-sections and aquifer parameters Measure local and reach-scale streambed conductivity Conduct long-term monitoring of stream/ground water levels and stream/aquifer analysis tests (4) Develop a stream depletion worksheet for estimating alluvial well depletion Objectives/Tasks North Canadian River

  6. Well Field

  7. Hydrogeologic Cross-Section ACOG: Electrical resistivity survey Schoff and Reed (1951): T = 870 m2/d Ryder (1996): Sy = 0.29 K = 48 m/d

  8. Streambed conductivity (Ksb) measurements at site: Empirical equations from grain-size distribution Streambed Conductivity

  9. Streambed conductivity (Ksb) measurements at site: Falling-head permeameter tests: Streambed Conductivity

  10. Reach-scale streambed conductivity (Ksb) measurements: Streambed Conductivity

  11. Water Level Monitoring

  12. Stream-Aquifer Analysis Test

  13. Estimating Stream Depletion 5 days

  14. A New Research Project: The Influence of Noodlers on Hydrological Studies

  15. North Canadian River at this reach mimics fully penetrating streams with little to no hydraulic resistance by a streambed layer Streambed conductivity similar to aquifer conductivity Easier solutions for estimating stream depletion High stream depletion in wells located near the rivers Solutions used to develop an Oklahoma Stream Depletion Factor (OSDF) worksheet Primary Findings

  16. Questions?E-mail: garey.fox@okstate.eduResearch Website: http://biosystems.okstate.edu/Home/gareyf

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