Nutrient Trends in Selected Springs of the Santa Fe River Robbie McKinney Environmental...

Nutrient Trends in Selected Springs of the Santa Fe RiverNutrient Trends in Selected Springs of the Santa Fe River

Robbie McKinneyEnvironmental Scientist-BiologistSanta Fe Springs Working Group

December 11, 2008

BackgroundBackground

• Water Assessment Regional Network

– Established 1989

– water quality status

– changing conditions

• Over 10 years of data collection

– Springs

– Rivers

– Lakes

• Water Assessment Regional Network

– Established 1989

– water quality status

– changing conditions

• Over 10 years of data collection

– Springs

– Rivers

– Lakes

SRWMD Spring Sampling SitesSRWMD 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

• 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

PARAMETERS UNITS METHOD

Field Measurements

Sample Depth meters

Total Depth meters

Water Temperature ºC 170.1 EPA

pH SU 150.1 EPA

Dissolved Oxygen--Probe mg L-1 360.1 EPA

Conductivity Field µmho cm-1 120.1 EPA

Conductivity at 25C µmhos cm-1 120.1 EPA

River Stage ft, NGVD

Discharge cfs

Secchi Disk meters

Salinity ppt 120.1 EPA

Physical/Biological Samples

Color PCU 110.2 EPA

Turbidity NTU 180.1 EPA

TDS mg L-1 160.1 EPA

Alkalinity mg L-1 310.2 EPA

TOC mg L-1 415.1 EPA

DOC mg L-1 5310B SM

Chlorophyll a µg L-1 10200H SM

Major Ions

Potassium mg L-1 6010EPA

Sodium mg L-1 6010EPA

Magnesium mg L-1 6010EPA

Calcium mg L-1 6010EPA

Chloride mg L-1 300EPA

Fluoride mg L-1 300 EPA

Sulfate mg L-1 300 EPA

Silica (Total Silicon) mg L-1 200.7 EPA

Nutrients

Nitrate+nitrite-nitrogen mg L-1 353.2 EPA

TKN mg L-1 351.2 EPA

Ammonia Nitrogen mg L-1 350.1 EPA

Total Phosphorus mg L-1 365.1 EPA

Orthophosphate mg L-1 365.1 EPA

Statistical AnalysesStatistical Analyses

• Data analysis includes

– Date collected

– Year collected

– Means comparisons

• Spearman Rho Correlations

• Split-plot Analysis of Variance (ANOVA)

• Data analysis includes

– Date collected

– Year collected

– Means comparisons

• Spearman Rho Correlations

• Split-plot Analysis of Variance (ANOVA)

Blue Springs at High SpringsBlue 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

• Gilchrist County

• Blue Springs Park


• 40 foot diameter vent

• Max. depth is 24 ft.

• Approx. 2000 ft. spring run

2007-2008 Nutrient Sample Data2007-2008 Nutrient Sample Data

**No TP correlation with Date, Year**

**Correlation between Date, Year, and NOX**

Period of Record NOX TrendsPeriod of Record NOX Trends

r = 0.489

p < 0.001

NOX Trends by YearNOX Trends by Year

r = 0.488

p < 0.001

Poe SpringsPoe Springs

• Alachua County

• Poe Springs County Park


• Approx. 150 ft. pool area

• Max depth is 18 ft.

• 60 ft. spring run

• Alachua County

• Poe Springs County Park


• Approx. 150 ft. pool area

• Max depth is 18 ft.

• 60 ft. spring run


r = -0.690

p < 0.001


r = -0.688

p < 0.001

Hornsby SpringsHornsby 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

• 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


r = -0.499

p < 0.001


r = -0.493

p < 0.001

Nitrate-Nitrite Nitrogen by SiteNitrate-Nitrite Nitrogen by Site

C

A

B

0.345 1.718 0.534

p<0.0001

Nitrate-Nitrite Nitrogen by YearNitrate-Nitrite Nitrogen by Year

No Significant DifferencesValue Range0.600 – 1.349

p=0.0857

Total Phosphorus by SiteTotal Phosphorus by SiteA A

B

0.102 0.046 0.099

p<0.0001

Total Phosphorus by YearTotal Phosphorus by Year

AA

B

ABABABAB

ABAB

ABAB

ABAB ABAB AB

ABA = 0.097

B = 0.066

p=0.0009

ReferencesReferencesBoyd, 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.


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

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.



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

Contact informationContact informationContact informationContact 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

[email protected]

Nutrient Trends in Selected Springs of the Santa Fe River Robbie McKinney Environmental...

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