Water Quality Conditions for National Park, Water Year 2017 Slough

Technical Oversight Committee Quarterly Meeting February 27, 2018

1 Water Quality Conditions – WY2017 Shark River Slough

Geometric Mean Long-term Level Mean Stage Number of Month TP Concentration (ppb) (feet NGVD 29) Samples (ppb) Arthur R. Marshall Loxahatchee National Wildlife Refuge Jul 2017 7.9 10.1 16.40 13 Aug 2017 6.6 8.8 16.69 14 Sep 2017 7.5 8.0 16.89 13 12-Month Percent of Sampling Events 12-Month Total Flow FWM TP Long-term Limit Greater than 10 ppb Period (kac-ft) Concentration (ppb) Ending (ppb) Guideline Observed – Shark River Slough – PROVISIONAL DATA and RESULTS Jul 2017 781.4 (785.2) 10.9 (10.9) 9.0 (9.0) 46.9 (46.8) 20.8 (20.0) Aug 2017 901.4 (902.2)PROVISIONAL 10.2 (10.2) WY20178.4 (8.4) RESULTS43.8 (43.8) 20.8 (20.0) Sep 2017 1038.0 (1042.2) 9.8 (9.8) 7.7 (7.7) 40.6 (40.5) 20.8 (20.0) Everglades National Park – and Coastal Basins Jul 2017 322.1 (336.4, 329.9) 5.2 (5.2, 5.2) 11.0 53.1 0.0 (0.0, 0.0) Aug 2017 346.6 (374.6, 368.2) 5.3 (5.3, 5.3) 11.0 53.1 0.0 (0.0, 0.0) Sep 2017 383.3 (420.1, 413.7) 5.9 (5.9, 6.0) 11.0 53.1 1.6 (1.6, 1.6)

SRS - Method 1 (left values) computed as S12s+(S333+S355A+S355B-S334) and Method 2 (values in parentheses) computed as S12s+(S333+S355A+S355B+S356-S334) Neither method excludes S334 flow from the total flow for long-term limit calculations. TS and CB - Method 1 (left values) computed as S332D+S18C, Method 2 (first values in parentheses) computed as S332D+S18C+G737, and Method 3 as (S332D-S332DX1– S328)+S328+G737+S18C. 2 Water Quality Conditions – WY2017 Shark River Slough • Prolonged dry conditions January-early June 2017 • Extreme rainfall June 2017 resulting in flow to SRS

3 Water Quality Conditions – WY2017 Shark River Slough • WY2017 TP results with and without flow • TP grab June 12 at S333 = 87 ppb

S12B, S12C and S12 D are generally sampled weekly if flowing

S12A and S333 are sampled weekly independent of flow

S12A TP with No Flow Symbols not filled represent events S333 TP with Flow when no flow was “around the corner” recorded at a structure

4 Water Quality Conditions – WY2017 Shark River Slough • Little to no flow to SRS leading up to June 6, 2017 • ~1,100 cfs through S333 beginning June 6

87 ppb June 12 June 6 – July 5, 2017 S333 Average Mean Daily Flow ≈ 1,100 cfs April 1 – June 6, 2017 S333 Average Mean Daily Flow ≈ 50 cfs

13 ppb June 19

5 Water Quality Conditions – WY2017 Shark River Slough • Dry conditions dropped WCA3 stage to 8.5’ NGVD • 3” rainfall June 6… 8” rainfall June 7 • EDEN12 marsh station stage rose 10” in 20 hours

6 WCA3A Stage = 3 Gage Mean Water Quality Conditions – WY2017 Shark River Slough • ~470 cfs of the ~1,100 cfs at S333 flowed to S334 • Low flow and dropping stage up to June 6

June 6 – July 5, 2017 S333 Average Mean Daily Flow ≈ 1,100 cfs (S334 ≈ 470 cfs)

April 1 – June 6, 2017 S333 Average Mean Daily Flow ≈ 50 cfs (S333 ≈ S334)

7 WCA3A Stage = 3 Gage Mean Water Quality Conditions – WY2017 Shark River Slough • Daily flows at S333 and S334 • 630 cfs to SRS June 6 – July 5, on average

Range Mean Daily Flow 182 – 1,392 cfs

June 6 – July 5, 2017 S333 Average Mean Daily Flow ≈ 1,100 cfs (S334 ≈ 470 cfs)

April 1 – June 6, 2017 S333 Average Mean Daily Flow ≈ 50 cfs (S333 ≈ S334)

8 WCA3A Stage = 3 Gage Mean Water Quality Conditions – WY2017 Shark River Slough • TP levels rising as WCA3 stage falls • High TP June 12 following stage and flow increase Mean Total P = 31 ppb Range Total P = 6 – 87 ppb

June 6 – July 5, 2017 S333 Average Mean Daily Flow ≈ 1,100 cfs (S334 ≈ 470 cfs)

April 1 – June 6, 2017 S333 Average Mean Daily Flow ≈ 50 cfs (S333 ≈ S334)

9 WCA3A Stage = 3 Gage Mean Water Quality Conditions – WY2017 Shark River Slough • June 12 grab sample TSS spiked at 11 mg/L

Total Suspended Solids Range: <3 – 11 mg/L

June 6 – July 5, 2017 S333 Average Mean Daily Flow ≈ 1,100 cfs (S334 ≈ 470 cfs)

April 1 – June 6, 2017 S333 Average Mean Daily Flow ≈ 50 cfs (S333 ≈ S334)

10 WCA3A Stage = 3 Gage Mean Water Quality Conditions – WY2017 Shark River Slough • S333 phosphorus more directly related to S333 HW

June 6 – July 5, 2017 S333 Average Mean Daily Flow ≈ 1,100 cfs (S334 ≈ 470 cfs)

April 1 – June 6, 2017 S333 Average Mean Daily Flow ≈ 50 cfs (S333 ≈ S334)

11 WCA3A Stage = 3 Gage Mean Water Quality Conditions – WY2017 Shark River Slough

12 Water Quality Conditions – WY2017 Shark River Slough

WY WY WY WY WY WY WY WY WY WY WY WY WY WY WY 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

13 yyyymmdd SRS1B SRS1C SRS2 G-3273 RG1 CR2 NP201 NE1 P33 P34 P37 TSB EP yyyymmdd SRS1B 10/1/2016SRS1C SRS20.007 G-32730.004 RG10.003 0.004CR2 NP2010.004 0.004NE1 0.002P33 0.003P34 0.003P37 0.005TSB 0.003EP 0.007 0.003 10/1/2016 0.007 11/1/20160.004 0.0030.005 0.0040.004 0.0030.004 0.0050.004 0.0040.002 0.0040.003 0.0020.003 0.0020.005 0.0030.0030.0020.0070.003 0.0030.003 0.004 11/1/2016 0.005 12/1/20160.004 0.0030.011 0.0120.005 0.0030.004 0.0030.004 0.0060.002 0.0040.002 0.0050.003 0.0050.002 0.0040.0030.0060.0030.003 0.0040.008 0.002 12/1/2016 0.011 1/1/20170.012 0.003 0.0050.003 0.0030.006 0.004 0.0160.005 0.005 0.0060.004 0.0030.006 0.0050.0030.0030.0080.004 0.002 0.003 1/1/2017 2/1/20170.005 0.003 0.004 0.0050.016 0.006 0.003 0.005 0.0030.003 0.0040.004 0.003 2/1/2017 3/1/20170.004 0.005 0.007 0.003 0.004 0.005 0.01 3/1/2017 4/1/2017 0.007 0.005 0.01 4/1/2017 5/1/2017 5/1/2017 6/1/2017 0.014 0.011 0.009 0.006 0.009 0.011 0.007 0.008 0.006 0.005 0.006 0.009 0.005 yyyymmdd SRS1B SRS1C SRS2 G3273 RG1 CR2 6/1/2017 0.014 7/1/20170.011 0.0090.007 0.0060.006 0.0060.009 0.0040.011 0.0050.007 0.0040.008 0.0040.006 0.0060.005 0.0060.0060.0050.0090.004 0.005 0.003 May-15 0.005 7/1/2017 0.007 0.006 0.006 0.004 0.005 0.004 0.004 0.006 0.006 0.005 0.004 0.003 8/1/2017 Jun-15– WY2017 0.004Shark0.0040.005 River0.005 Slough0.003 0.003 0.004 0.003 Water8/1/2017 Quality Conditions 0.004 0.004 0.005 0.003 0.003 0.004 0.003 9/1/2017 0.005 0.006 0.003 0.004 Jul-150.004 0.003 0.003 0.0050.003 0.003 0.002 0.002 0.003 9/1/2017 0.005 0.006 0.003 0.004 0.004 0.003 0.003 0.005 0.003 0.002 0.002 0.003 SRS1B SRS1C SRS2 yyyymmddG-3273 Aug-15RG1 SRS1BCR2 NP201SRS1C NE1SRS20.004 G-3273P33 0.01 P34RG10.009 P37CR20.008TSBNP201 EP NE1AverageP33 P34 P37 TSB EP SRS1B SRS1C SRS2 G-3273 RG1 CR2 NP201 NE1 P33 P34 P37 TSB EP Average May2017-Sep2017 Sep-15Oct-16 0.007 0.004 0.0040.003 0.0040.004 0.0060.004 0.0040.004 0.002 0.003 0.003 0.005 0.003 0.007 0.003 May2017-Sep2017 0.008 0.007 0.005 0.005 0.006 0.005 0.004 0.006 0.005 0.003 0.003 0.005 0.004 0.005 Geomean0.008 0.007 0.005 0.005 0.006 0.005Nov-16Oct-150.004 0.0050.0070.006 0.0090.0040.005 0.0040.0030.003 0.0050.0050.003 0.0060.0040.005 0.0040.0040.004 0.0020.005 0.002 0.003 0.002 0.003 0.003 0.004 Geomean Oct2016-Sep2017 Nov-15Dec-16 0.0110.022 0.0060.012 0.003 0.0030.003 0.0040.006 0.0040.004 0.005 0.005 0.004 0.006 0.003 0.008 0.002 Oct2016-Sep2017 0.008 0.006 0.004 0.004 0.006 0.005 0.004 0.004 0.005 0.004 0.003 0.005 0.003 0.005 Geomean0.008 0.006 0.004 0.004 0.006 0.005Dec-15Jan-170.004 0.0060.004 0.0080.0050.005 0.0040.0030.004 0.0040.003 0.0060.0160.005 0.0030.003 0.0060.005 0.003 0.005 0.003 0.004 0.003 Geomean Average of WY13-17 Feb-17Jan-16 0.006 0.004 0.0030.005 0.004 0.003 0.002 0.003 0.004 Average of WY13-17 0.007 0.005 0.004 0.003 0.005 0.003 0.003- 0.004 0.004 0.004 0.002 0.003 0.003 0.004 Geomeans0.007 0.005 0.004 0.003 0.005 0.003Mar-17Feb-160.003 0.0150.004 0.004- 0.004 0.0040.0070.004 0.0040.002 0.0040.003 0.0030.003 0.004 0.005 0.01 Geomeans Mar-16 0.008 0.006- 0.005 0.003 0.003 0.002 yyyymmdd Apr-17 SRS1B SRS1C SRS2 G-3273 RG1 CR2 NP201 NE1 P33 P34 P37 TSB EP Apr-16 0.006 0.005 0.003 0.004 0.004 0.003 May-17Oct-16 0.007 0.004 0.003 0.004 0.004 0.004 0.002 0.003 0.003 0.005 0.003 0.007 0.003 Nov-16Jun-17 0.0050.014 0.0040.011 0.0030.009 0.0050.006 0.0040.009 0.0040.011 0.0020.007 0.0020.008 0.0030.006 0.0020.005 0.0030.006 0.0030.009 0.0040.005 Dec-16Jul-17 0.0110.007 0.0120.006 0.0030.006 0.0030.004 0.0060.005 0.004 0.0050.004 0.0050.006 0.0040.006 0.0060.005 0.0030.004 0.008 0.0020.003 Aug-17Jan-17 0.005 0.003 0.016 0.0060.004 0.0030.004 0.005 0.003 0.0040.003 0.004 0.003 Feb-17Sep-17 0.005 0.0040.006 0.0050.003 0.004 0.004 0.003 0.003 0.0030.005 0.0040.003 0.002 0.002 0.003 Mar-17 0.007 0.005 0.01 Apr-17 May-17 Jun-17 0.014 0.011 0.009 0.006 0.009 0.011 0.007 0.008 0.006 0.005 0.006 0.009 0.005 Jul-17 0.007 0.006 0.006 0.004 0.005 0.004 0.004 0.006 0.006 0.005 0.004 0.003 Aug-17 0.004 0.004 0.005 0.003 0.003 0.004 0.003 Sep-17 0.005 0.006 0.003 0.004 0.004 0.003 0.003 0.005 0.003 0.002 0.002 0.003 Note: June ENP sampling – 6/13 & 6/14 14 Water Quality Conditions – WY2017 Shark River Slough

• Summary of Water Year 2017: • Water Year 2017 conditions are representative of the previously documented dynamic between stage and total phosphorus concentration observed • Long-term water quality conditions and trends in Everglades Protection Area continue to improve • The long-term, downward trend in the flow-weighted mean total phosphorus concentration for the inflow structures to Everglades National Park continued through Water Year 2017

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