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Nutrient Trends in Selected Springs of the Santa Fe River

Nutrient Trends in Selected Springs of the Santa Fe River. Robbie McKinney Environmental Scientist-Biologist Santa Fe Springs Working Group December 11, 2008. Background. Water Assessment Regional Network Established 1989 water quality status changing conditions

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Nutrient Trends in Selected Springs of the Santa Fe River

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  1. Nutrient Trends in Selected Springs of the Santa Fe River Robbie McKinney Environmental Scientist-Biologist Santa Fe Springs Working Group December 11, 2008

  2. Background • Water Assessment Regional Network • Established 1989 • water quality status • changing conditions • Over 10 years of data collection • Springs • Rivers • Lakes

  3. SRWMD Spring Sampling Sites • Poe Springs – June 1997 * • Ginnie Springs – November 1997 • Blue Springs (High Springs) – December 1992 * • Columbia Springs – May 1998 • Treehouse Springs – May 1998 • Hornsby Springs – November 1992 * • Santa Fe Springs – June 1998 *monitored monthly; included in presentation

  4. Statistical Analyses • Data analysis includes • Date collected • Year collected • Means comparisons • Spearman Rho Correlations • Split-plot Analysis of Variance (ANOVA)

  5. Blue Springs at High Springs • Gilchrist County • Blue Springs Park • Second Magnitude • 40 foot diameter vent • Max. depth is 24 ft. • Approx. 2000 ft. spring run

  6. 2007-2008 Nutrient Sample Data **Correlation between Date, Year, and NOX** **No TP correlation with Date, Year**

  7. Period of Record NOX Trends r = 0.489 p < 0.001

  8. NOX Trends by Year r = 0.488 p < 0.001

  9. Poe Springs • Alachua County • Poe Springs County Park • Second Magnitude • Approx. 150 ft. pool area • Max depth is 18 ft. • 60 ft. spring run

  10. 2007-2008 Nutrient Sample Data **Correlation between Date, Year, and NOX** **No TP correlation with Date, Year**

  11. Period of Record NOX Trends r = -0.690 p < 0.001

  12. NOX Trends by Year r = -0.688 p < 0.001

  13. Hornsby Springs • Alachua County • Camp Kulaqua • Second Magnitude • Pool is approx. 300 ft • Max. depth is 20 ft. • 35 ft. diameter vents • 0.8 mile spring run

  14. 2007-2008 Nutrient Sample Data **Correlation between Date, Year, and NOX** **No TP correlation with Date, Year**

  15. Period of Record NOX Trends r = -0.499 p < 0.001

  16. NOX Trends by Year r = -0.493 p < 0.001

  17. Nitrate-Nitrite Nitrogen by Site A p<0.0001 B C 0.345 1.718 0.534

  18. Nitrate-Nitrite Nitrogen by Year No Significant Differences p=0.0857 Value Range 0.600 – 1.349

  19. Total Phosphorus by Site A A p<0.0001 B 0.102 0.046 0.099

  20. Total Phosphorus by Year A A AB AB AB AB p=0.0009 AB AB AB AB AB AB AB AB AB AB B A = 0.097 B = 0.066

  21. References Boyd, C. E. 2000. Water quality: an introduction. Kluwer Academic Publishers. Norwell, MA. 330 pp. Hornsby, D., R. Ceryak. 1998. Springs of the Suwannee River basin. Suwannee River Water Management District. Live Oak, FL. 183 pp. Hornsby, D., R. A. Mattson, and T. Mirti. 1998. Surfacewater quality and biological annual report. Suwannee River Water Management District. Live Oak, FL. 148 pp. Hornsby, D., R. A. Mattson, and T. Mirti. 2000. Surfacewater quality and biological annual report. Suwannee River Water Management District. Live Oak, FL. 234 pp. Maceina, M. J., P. W. Bettoli, and D. R. DeVries. 1994. Use of a split-plot analysis of variance design for repeated-measures fishery data. Fisheries 19(3): 14-20. SAS Institute Inc. SAS version 8.2 for Windows. Cary, NC: SAS Institute Inc. 1998-2001. SPSS, Inc. SPSS Statistics 17.0. Chicago, IL: SPSS, Inc. 2008

  22. Contact information Robbie McKinney, M.S. Environmental Scientist-Biologist Suwannee River Water Management District 9225 County Road 49 Live Oak, FL 32060 386.362.1001 800.226.1066 RLM@SRWMD.ORG

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