Surface Water-Groundwater Interactions and Nitrogen Cycling in a Tidally Influenced River Study

Study on the dynamic interactions between surface water and groundwater in a tidal river, focusing on nitrogen cycling. The research highlights the impact of tidal fluctuations on bank storage, nitrogen transformation, and nutrient cycling. Findings suggest that river discharge affects the exchange processes, with implications for nutrient levels at different tide stages.

• Surface water
• Groundwater interactions
• Nitrogen cycling
• Tidal river study
• River discharge

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Uploaded on Sep 01, 2024 | 1 Views

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Presentation Transcript

1. DYNAMIC SURFACE WATER-GROUNDWATER INTERACTIONS AND NITROGEN CYCLING IN A TIDALLY INFLUENCED RIVER Cole Musial, Audrey Sawyer, Rebecca Barnes, Samuel Bray, Deon Knights

2. Conceptual Model Stage fluctuations in tidal rivers drive bank storage Bank storage zones may be intense zones of nitrogen transformation

3. Field Site

4. High tide Low tide

7. Tidal Surface Water-Groundwater Exchange Average Tidal Exchange over 1 cycle = .02m3 Percent of River Discharge = 0.4% K = .000269m/s

8. River Discharge

10. Low Tide DO

11. High Tide DO

12. Low Tide NO3+NO2

13. High Tide NO3+NO2

15. Conclusions Low river discharge corresponds with reversals in surface water-groundwater exchange. Peak aquifer discharge is at times of intermediate stream discharge. Tidal rivers are dynamic environments for nutrient cycling DO and nitrate vary with tides near water table and streambed due to surface water- groundwater exchange

16. Acknowledgments Anthony Aufdenkampe Ph.D. Louis Kaplan, Ph.D. Holly Michael Chris Russoniello Kaileigh Calhoun Hale Byrnes House, Kim and Ralph Burdick