Weeki Wachee River System Recommended Minimum Flows and ...

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Table 8-1 Summary of Weeki Wachee MFL Results…………………………………….112 Table 8-2 Long-Term Minimum Flows Corresponding to Recommended MFL………………………………………………………………………………………….114 x
Preface This report was prepared by the Southwest Florida Water Management District pursuant to Florida Statute 473.042. A draft was made available to the public on April 14, 2008 and submitted to an independent peer review panel consisting of Dr. Joseph Boyer (Fla. International University), Dr. 'Billy' Johnson (Computational Hydraulics Inc), Mr. Gary Powell (Aquatic Science Associates) and Dr. Sam Upchurch (SDII Global). Among other things, the panel was directed to determine whether the methods used for establishing the minimum flow are scientifically reasonable, if the assumptions and procedures are reasonable and consistent with the best information available and if the District's conclusions are supported by the data. The panel submitted their report on July 31, 2008, which is appended to this along with the District's response. In addition, the US Fish and Wildlife Service and the Florida Fish and Wildlife Conservation Commission reviewed the report and submitted comments that are also appended. This final report reflects the comments and suggestions received. Acknowledgements I would like to thank my colleagues for the many useful suggestions and discussions pertinent to completion of this project. In particular I would like to acknowledge Marty Kelly, Rich Schultz, Ron Basso for their assistance in deriving corrections to the historical flow record. I would also like to thank Sid Flannery, XinJian Chen and Tony Janicki and his staff. I would like to offer a special thanks to Michelle Dachsteiner for her dedication to the field work and data management as well as Barbara Matrone for her assistance in document production. Finally I would like to thank the many District contractors that contributed to this report. Ernst Peebles (and his staff at USF) and Tim MacDonald and his colleagues at Florida Fish and Wildlife Conservation Commission collected and analyzed the fish and invertebrate data. Ernie Estevez conducted field surveys of mollusk use of the Weeki Wachee, and along with Jay Leverone conducted a survey of the macrophyte community. Paul Montagna provided insightful analysis of mollusc data. The staff at Janicki Environmental conducted a survey and analysis of the benthic community and along with staff from Applied Technology and Management, provided numeric modeling results for the thermal refuge analysis. While several of these projects were regional in nature, the cost of outside support is approximately $300,000 which was provided by Coastal Rivers Basin Board and the Governing Board. xi
Page 1: Weeki Wachee River System Recommend
Page 4 and 5: Conversion Table Metric to U.S. Cus
Page 6 and 7: 5.2 FISH ..........................
Page 8 and 9: Figure 3-2 Location of Bathymetric
Page 10 and 11: LIST OF TABLES Table 1-1 Rule-of-Th
Page 14 and 15: Executive Summary Minimum Flows and
Page 16 and 17: CHAPTER 1 - PURPOSE & BACKGROUND OF
Page 18 and 19: 1) flood flows that determine the b
Page 20 and 21: the area." What constitutes "signif
Page 22 and 23: Table 1-1 Rule-of-Thumb Estimates f
Page 24 and 25: this report identifies specific res
Page 26 and 27: 1.6 Content of Remaining Chapters I
Page 28 and 29: CHAPTER 2 - WATERSHED CHARACTERISTI
Page 30 and 31: # # # circular vent 1.8 meters in d
Page 32 and 33: Figure 2-5 1970s Aerial with 1999 U
Page 34 and 35: is a variation of the Seminole word
Page 36 and 37: Figure 2-6 Hurricane Tracks near Ba
Page 38 and 39: varied by period. The variation was
Page 40 and 41: 2.3.2 Baseline Period Figure 2-10 i
Page 42 and 43: found (ktau p=0.06) between total g
Page 44 and 45: similarly across the springsheds ex
Page 46 and 47: Figure 2-15 Wavelet Filtered Discha
Page 48 and 49: Figure 2-16 INTB Groundwater Model
Page 50 and 51: 2.6 Seasonal Blocks As described in
Page 52 and 53: Table 2-6 Median (cfs) Flow by Bloc
Page 54 and 55: # # # Surface waters in this stretc
Page 56 and 57: 3.1.3 Segmentation Segmentation was
Page 58 and 59: Figure 3-5 Dominant SAV and Median
Page 60 and 61: Figure 3-6 Sediment Characteristics
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Figure 3-7 Shoreline / Buffer Veget
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CHAPTER 4 - TIDE, SALINITY & WATER
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Two additional harmonic pairs were
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Figure 4-5. Median Bottom Salinity
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Figure 4-7 Salinity Range (1984-200
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uncovering in response to strong wi
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E) Salinity = β o + β 1 *Flow 2 +
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Additional exploratory attempts usi
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86 = 186 cfs, SWFWMD 1994-96 = 167
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A regression of the form below was
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Table 4-8 Median Water Quality of W
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Figure 4-10 Nitrate Concentration a
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CHAPTER 5 - BIOLOGICAL CHARACTERIST
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Figure 5-1 Principal Component Anal
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measured volume sampled which was t
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5.2.2 Relation to inflow Response t
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Table 5-7 Location Response (km u )
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Table 5-9 Abundance Response to Inf
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animals can survive chronic exposur
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Figure 5-3 Number of Aerial Manatee
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Figure 5-5(a) Molluscan Presence /
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Table 5-11 Rank Order of Mollusc Ab
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Figure 5-5 Polymesoda caroliniana A
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Figure 6-1 Plankton Tow Flows Compa
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In application, a baseline area and
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6.1.4 Benthos Protection for benthi
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Figure 6-3. Location of the Three P
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7.2 Manatee Approach Establishing a
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Figure 7-2 Joint Probability of Occ
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Figure 7-3 Maximum Day Manatee Usag
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Figure 7- 6 Example Calculations fo
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Figure 7- 7 Estimation of Flow Redu
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Figure 7-8. Summary Results for the
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The reductions in flow that meet th
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probably accounts in part for the d
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Postel, S. and B.Richter. 2003. Riv
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Stanford, J.A., J.V.Ward, W.J. Liss
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Culter, J.K. 1986. Water Chemistry.
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CHAPTER 10 - APPENDICES 10.1 Append
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The wavelet used is the symmlets wa
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explains, the energy plot shows the
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0 if no significant withdrawal Z =
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One advantage of using this regress
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Technical Memorandum January 22, 20
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Lecanto 1 & 2 #S Well Site Descript
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Figure 4. HSPF subbasins in the INT
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Most of the limestone mines located
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3.1.3 Septic Tank Recharge in the S
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Figure 10. Groundwater grid in the
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Basso, R.J., 2004, Hydrogeologic Se
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10.2 Appendices - Chapter 3 Appendi
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10.3 Appendices - Chapter 4 Appendi
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Appendix 4-2 Data Sources Water qua
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Appendix 4-3 Water Quality Trend Gr
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Water Quality Trend Graphics, conti
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Page 174 and 175:
Page 176 and 177:
Page 178 and 179:
Page 180 and 181:
United States Department of the Int
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October 8,2008 Florida Fish and Wil
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Martin Kelly, Ph.D. Page 3 October
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Scientific Peer Review of the Propo
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Determining a low flow need during
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Current state water policy, as expr
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Spring, Twin Dees Spring and possib
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under varying flow regimes. The fir
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Weeki Wachee Rainfall, Springflow a
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6.0 Discharge:Precipitation (cfs/in
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Nevertheless, a major concern with
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system grid is not totally orthogon
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In a hydrodynamic model study, one
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analysis was rather cursory. The Di
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(taxa) richness in the WWRS. If the
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Freshwater Habitats Approximately 1
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ERRATA and EDITORIAL COMMENTS Page
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Page Paragraph Line Comment 14 Some
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Page Paragraph Line Comment 21 The
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Page Paragraph Line Comment 26 The
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REFERENCES Alber, M. 2002. A Concep
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Richter, B. D., J. V. Baumgartner,
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the regression equation used to pre
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and the three independent approache
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The Southwest Florida Water Managem
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the model in terms of tides, salini
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Attachment 1 - Comparison of salini
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Figure 1. Predicted drawdown (feet)
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