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Suwannee & Santa Fe TMDL. Suwannee & Santa Fe Planning Units & WBIDs.

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Presentation on theme: "Suwannee & Santa Fe TMDL. Suwannee & Santa Fe Planning Units & WBIDs."— Presentation transcript:

1 Suwannee & Santa Fe TMDL

2 Suwannee & Santa Fe Planning Units & WBIDs

3 Suwannee & Santa Fe STORET Stations

4 Consent Decree Timeline EPA must propose TMDL by September 30, 2008 unless, EPA must propose TMDL by September 30, 2008 unless, EPA approves FDEP adopted TMDLEPA approves FDEP adopted TMDL FDEP must issue draft TMDL in early July FDEP must issue draft TMDL in early July 30-Day Comment Period30-Day Comment Period Propose TMDL in early August Propose TMDL in early August

5 Impaired WBIDs Planning Unit WBID Water Segment Name WaterbodyType 1998 303(d) Parameter of ConcernParameters Assessed Using the IWR Priority for TMDL Development Lower Suwannee 3422 SUWANNEE RIVER (LOWER) STREAM Nutrients (Hist Chlorophyll) High Lower Suwannee 3422R MANATEE SPRINGS STREAM Nutrients (Algal Mats) Medium Lower Suwannee 3422S FANNING SPRINGS STREAM Nutrients (Algal Mats) Medium Lower Suwannee 3422D LOWER SUWANNEE ESTUARY ESTUARY ChlorophyllHigh Middle Suwannee 3422J BRANFORD SPRING STREAM Nutrients (Algal Mats) Medium Middle Suwannee 3422L RUTH SPRING STREAM Nutrients (Algal Mats) Medium Middle Suwannee 3422T TROY SPRING STREAM Nutrients (Algal Mats) Medium Middle Suwannee 3422U ROYAL SPRING STREAM Nutrients (Algal Mats) Medium Middle Suwannee 3422Z FALMOUTH SPRING STREAM Nutrients (Algal Mats) Medium Santa Fe River 3605A SANTA FE RIVER STREAM Nutrients (Algal Mats) High Santa Fe River 3605C SANTA FE RIVER STREAM Nutrients (Algal Mats) High Santa Fe River 3605A SANTA FE RIVER STREAMDissolvedOxygen Dissolved Oxygen High Santa Fe River 3605C SANTA FE RIVER STREAMDissolvedOxygen Dissolved Oxygen High Santa Fe River 3605F ALTHO DRAINAGE STREAMDissolvedOxygen Dissolved Oxygen High Upper Suwannee 3341 SUWANNEE RIVER (UPPER) STREAMDissolvedOxygen Dissolved Oxygen High

6 Impaired WBIDs

7 Photograph of filamentous algae at Branford 2000 Macroalgal bloom in Suwannee estuary winter 2000 Macroalgal mats on the lower Santa Fe River WY2000

8 Lower Suwannee River – 2000 At Fowler’s Bluff

9 Middle Suwannee River - 2000 Above Branford

10 Lower Santa Fe River - 2001

11 Lower Santa Fe River at Rum Island - 2006

12 LSFR below Rum Island Spring - 2006

13 Rum Island Spring 2006

14 Lower Santa Fe River – 2000 Below Devil’s Complex

15

16 Trends in Nitrate (NO 3 )

17 Historic Trends in NO 3

18 Historic Flows

19 Lines of Evidence

20 Change Point Analysis of the Suwannee River Algal Data (FDEP 2007) Change Point Analysis of the Suwannee River Algal Data (FDEP 2007) Nutrient TMDLs for the Wekiva River & Rock Springs Run (FDEP 2007) Nutrient TMDLs for the Wekiva River & Rock Springs Run (FDEP 2007) Ecological Condition Of Algae & Nutrients In Florida Springs: The Synthesis Report (Stevenson et al, 2007) Ecological Condition Of Algae & Nutrients In Florida Springs: The Synthesis Report (Stevenson et al, 2007)

21 Change Point Analysis of the Suwannee River Algal Data A positive relationship between periphyton cell density & NO 3 concentration was identified in Suwannee River (Hornsby et al. 2000) A positive relationship between periphyton cell density & NO 3 concentration was identified in Suwannee River (Hornsby et al. 2000) The change point (0.286 mg/L) is the NO 3 concentration causing the switch of cell density The change point (0.286 mg/L) is the NO 3 concentration causing the switch of cell density

22 Nutrient TMDLs for the Wekiva River & Rock Springs Run 2007 A negative correlation was observed between the NO 3 concentration & the ecological efficiency (Knight 2005) A negative correlation was observed between the NO 3 concentration & the ecological efficiency (Knight 2005) Using the summer time reference creek ecological efficiency as the target, the target NO 3 concentration is 0.293 mg/L Using the summer time reference creek ecological efficiency as the target, the target NO 3 concentration is 0.293 mg/L Target NO x = 0.293 mg/L

23 Nutrient TMDLs for the Wekiva River & Rock Springs Run 2007 -Continued Nutrient amendment studies on Lyngbya wollei were conducted by Cowell & Dawes (2004). Nutrient amendment studies on Lyngbya wollei were conducted by Cowell & Dawes (2004). Significant increase in biomass of Lyngbya wollei was observed when NO 3 concentration reaches 0.3 mg/L. Significant increase in biomass of Lyngbya wollei was observed when NO 3 concentration reaches 0.3 mg/L. Further decrease of NO 3 below 0.3 mg/L did not cause dramatic decrease in biomass. Further decrease of NO 3 below 0.3 mg/L did not cause dramatic decrease in biomass. Suggested NO 3 target: 0.300 mg/L Suggested NO 3 target: 0.300 mg/L

24 Ecological Condition Of Algae & Nutrients In Florida Springs: The Synthesis Report (Stevenson et al, 2007) The saturating concentrations for nitrate(NO 3 ), are the concentrations at which growth was predicted to be elevated by 90% above which no effects of nutrient reduction would be expected The saturating concentrations for nitrate(NO 3 ), are the concentrations at which growth was predicted to be elevated by 90% above which no effects of nutrient reduction would be expected Saturating concentrations of NO 3 at 0.230 (mg/L) and 0.261 (mg/L) for two taxa of common macroalgae that occurred in extensive growth. Saturating concentrations of NO 3 at 0.230 (mg/L) and 0.261 (mg/L) for two taxa of common macroalgae that occurred in extensive growth. (Stevenson et al, 2007)

25 Summary Nitrate Concentration Target Suwannee River periphtyon study: 0.286 mg/L. Suwannee River periphtyon study: 0.286 mg/L. Wekiva River & Rock Springs Run ecological efficiency study: 0.293 mg/L Wekiva River & Rock Springs Run ecological efficiency study: 0.293 mg/L L. wollei nutrient amendment study: 0.300 mg/L L. wollei nutrient amendment study: 0.300 mg/L Saturation Study: saturating concentrations of NO 3 at 0.230 (mg/L) and 0.261 (mg/L) Saturation Study: saturating concentrations of NO 3 at 0.230 (mg/L) and 0.261 (mg/L) The final nitrate concentration target for this TMDL is: 0.286 mg/L The final nitrate concentration target for this TMDL is: 0.286 mg/L The target is a monthly average target The target is a monthly average target

26 Calculating Reduction Nitrate (NO 3 )

27 Nitrite + Nitrate concentrations in Mainstem WBIDs over the 1999 – 2006 period YearJANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDEC 19990.7580.3130.6240.6850.7350.7610.6850.6560.6660.8330.6710.817 20000.8540.7730.5600.2050.6230.4150.4710.4190.3650.5140.8840.828 20010.3700.4260.4070.2130.5960.5460.3190.2890.6870.7960.8410.843 20020.8070.7160.1430.3990.6090.5630.3950.5030.5890.6600.5090.424 20030.2040.6200.0540.1380.5380.5860.3390.3550.3690.9860.5280.920 20040.8590.2090.2700.8160.8370.8000.4960.5530.0510.0060.4960.384 20050.4040.5810.1190.0220.3500.4470.1900.1900.7190.9441.0210.720 20060.1140.0790.2830.9460.8810.8250.7720.6592.2750.5480.8210.797 Average0.5460.4650.3080.4280.6460.6180.4580.4530.7150.6610.7210.716 Maximum of monthly averages 0.721 Percent Reduction 60.36% Middle Suwannee

28 Total Phosphorus (TP)

29 Historic Trends in TP = OFW Designation 1984= Target Years

30 TP concentrations in Mainstem WBIDs over the 1999 – 2006 period Percent Reduction 22.73% Middle Suwannee YearJANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDEC 19990.1970.1300.1230.1500.1250.0950.1710.1470.1030.2150.3310.143 20000.1110.1670.1330.1360.1130.0700.1160.1890.1790.1330.0960.112 20010.1060.0880.1330.1220.1400.1350.2030.2210.2100.2320.2410.202 20020.1950.2970.2780.2500.1950.2610.2510.2460.2800.1570.1850.340 20030.1090.1360.2370.1660.1590.1900.1750.1610.1880.1970.1530.131 20040.2310.1690.1370.1270.2500.1190.1720.1980.3180.1600.1420.144 20050.146 0.1810.1400.1540.1840.1830.1800.1690.1450.1410.209 20060.1900.1840.1180.1360.1410.1630.1360.1940.1580.2080.1510.190 Average0.1610.1640.1670.1530.1600.1520.1760.1920.2010.1810.1800.184 Maximum of monthly averages0.201

31 Planning Unit Max Monthly Avg (mg/L) Target Percent Reduction Middle Suwannee 0.2010.15522.73% Lower Suwannee 0.1360.11019.41% Lower Santa Fe 0.1540.0848%TP

32 TMDL & Reductions Nitrate Target (mg/L) TP Middle Suwannee 0.2860.155 Lower Suwannee 0.2860.110 Lower Santa Fe 0.2860.080

33 Current Conditions Maximum Monthly Average 0.065mg/L NO3 Maximum Monthly Average 0.721mg/L NO3 0.201mg/L TP Maximum Monthly Average 0.838mg/L NO3 0.136mg/L TP Lower Santa Fe Maximum Monthly Average 0.535mg/L NO3 0.154mg/L TP Upper Santa Fe Maximum Monthly Average 0.197mg/L NO3

34 Percent Reductions To Reach Targets Upper Santa Fe Percent Reduction 0.00% NO 3 Percent Reduction 0.00% NO 3 Middle Suwannee Percent Reduction 60.36% NO 3 22.73% TP Lower Suwannee Percent Reduction 65.86% NO 3 19.41% TP Lower Santa Fe Percent Reduction 46.54% NO 3 0% TP

35 Summary & Conclusion


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