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J.C. Schneider, S.B. Upchurch, K.M. Champion, J.C. Good, and D. Hornsby

This study focuses on the surface water-groundwater interactions at Madison Blue Spring and Withlacoochee River in North Florida. Utilizing synthesized data, the research explores the relationships between river flow, spring discharge, and backwater conditions in a karst terrain. By simulating gauge data and analyzing inflows, outflows, and stage-discharge patterns, the study reveals insights into the hydrological dynamics of the area.

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J.C. Schneider, S.B. Upchurch, K.M. Champion, J.C. Good, and D. Hornsby

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  1. Using synthesized data to quantify surface water-groundwater relationships at Madison Blue Spring and the Withlacoochee River of North Florida J.C. Schneider, S.B. Upchurch, K.M. Champion, J.C. Good, and D. Hornsby

  2. First magnitude spring on Withlacoochee river MFL focused on springs contribution to flow in river Complicating factors MBS is an estavelle Very little data Madison Blue Spring

  3. Surface water-groundwater interactions • Well developed karst terrain • River flows along Ocala Limestone • Essentially all inflow is through ground

  4. Backwater Conditions • Floods are larger and longer on the Suwannee River (larger basin) • Creates a hysteresis curve for stage-discharge data from gauges on Withlacoochee River

  5. Station Period of Record Basin Size (mi2) Number of stage readings Number of discharge readings Measured values Daily Values Measured Values Daily Values Madison Blue Spring 03/16/32-07/31/03 -------- -------- 352 22 210 Withlacoochee River near Pinetta 12/11/31-08/25/03 2120 N/A 26081 N/A 25930 Withlacoochee River near Madison 04/11/60-03/25/98 2240 486 -------- 10 -------- Withlacoochee River near Lee 11/01/00-8/24/03 2330 19 1021 19 1027 Suwannee River at Ellaville 02/01/27-08/25/03 6970 N/A 27589 N/A 27966 Summary of River and Spring Gauge Data

  6. Simulating Lee and Madison Gauge Data • Step-wise, multiple linear regressions to simulate stage data • LeeStage = -7.053 + 0.195PinettaStage + 0.887EllavilleStage • MadisonStage=-3.198 + 0.588PinettaStage + 0.428LeeStage • Develop Stage-Fall-Discharge rating for each gauge • Result: 70+ years of simulated stage-discharge data for Madison and Lee gauges

  7. With simulated Madison and Lee data we can examine the relationships between: • Discharge and/or stage • Inflows/outflows • Fall or backwater conditions

  8. Inflows vs. Stage Average Inflow = 133 cfs

  9. Fall vs. Stage Average Fall = 10.6 ft

  10. Fall vs. Stage vs. Inflows

  11. Inflows vs. Fall Significance of Fall = 7 ft ?

  12. Synthesizing Data for Madison Blue Spring • Is there a relationship between the flow in the Withlacoochee River and the discharge of Madison Blue Spring? • Yes, but….

  13. Synthesizing Data for Madison Blue Spring • When we plot the calculated spring discharge versus the total inflows or outflows to the river … • Not accounting for times when river discharge is controlled by backwater conditions

  14. Synthesizing Data for Madison Blue Spring • Is there a relationship between total inflows to the Withlacoochee River and discharge at Madison Blue Spring? • Yes, there is a linear relationship • Using this relationship, a period of record for Madison Blue Spring was synthesized

  15. Summary and Conclusions Simulated period of record for Madison and Lee gauges. The backwater effect on the Withlacoochee River controls the relationship between stage/discharge and inflows/outflows. A relationship between spring discharge and river discharge does not account for this backwater effect. Simulated period of record for spring discharge as a linear function of inflows/outflows to the river.

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