Weeki Wachee River System Recommended Minimum Flows and ...

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Figure 7-8. Summary Results for the "wide" Weeki Wachee River PHABSIM Site. (Figure is a box and whisker plot for percent-of-flow reductions associated with a 15% reduction in available habitat for selected biota are shown, based on review of ten, twenty, thirty and forty percent reductions in measured flows. 40 35 Percent Flow Reduction 30 25 20 15 10 5 0 Jan Feb Mar Apr May June July Aug Sep Oct Nov Dec Figure 7-9. Summary results for the "sandbag" Weeki Wachee River PHABSIM site. (Figure is a box and whisker plot for percent-of-flow reductions associated with a 15% reduction in available habitat for selected biota are shown, based on review of ten, twenty, thirty and forty percent reductions in measured flows. 30 25 Percent Flow Reduction 20 15 10 5 0 Jan Feb Mar Apr May June July Aug Sep Oct Nov Dec ____________________________________________________________________________________________ Proposed Minimum Flows and Levels for Weeki Wachee River Technical Approach Page 111 of 164
CHAPTER 8 - CONCLUSIONS AND DISTRICT RECOMMENDATIONS FOR MFL 8.1 Summary of Outcomes The tools described in Chapter 5 were applied to the criteria presented in Chapter 6. Examples were given in Chapter 7. For each resource, an estimate of the percentage reduction of seasonal flow that would cause a presumed significant harm (e.g. 15% loss or resource or habitat) was determined. The resources evaluated and basis of flow evaluation include: o Salinity habitat (adjusted flows) o Area o Volume o Benthic Community (observed flows) o Abundance o Number of taxa o Diversity o Molluscs (dominant native) (observed flows) o Polymesoda caroliniana o Crassostrea virginica o Littoraria irrorata o Fish and Invertebrates (observed flows) o Gastropods, opisthobranch (sea slug) o Unidentified harpacticoid o Lagodon rhomboides (pinfish) o Callinectes sapidus (blue crab) o Farfanepenaeus duorarum (pink shrimp) o Manatee Thermal Refuge (adjusted flows) o Freshwater Habitats (adjusted flows) o PHABSIM The results are summarized in Table 8-1. Not included in the table are the fish / invertebrates results because the range of flows observed during capture were at the predicted total exclusion of these taxa at flows normally encountered. Also excluded are the Manatee thermal refuge results because even at the low flow conditions with extremely low joint probability, the thermal refuge remaining after large reductions (e.g. 25 percent) is sufficient to shelter the entire Northwest Florida manatee population and is in excess of forty times the number of animals that typically use the Weeki Wachee. Several of the results reported for the 15 ppt isohaline habitat are the result of an 'extended interpolation'. In some cases the projected location of the isohaline is in the Gulf westward of river kilometer zero. In these cases, the last rate of salinity change ( Δ ppt / Rkm) within the study boundary was used to estimate the location within the Gulf. ____________________________________________________________________________________________ Proposed Minimum Flows and Levels for Weeki Wachee River Conclusions and Recommendations Page 113 of 164
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Weeki Wachee River System Recommend
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Conversion Table Metric to U.S. Cus
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5.2 FISH ..........................
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Figure 3-2 Location of Bathymetric
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LIST OF TABLES Table 1-1 Rule-of-Th
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Table 8-1 Summary of Weeki Wachee M
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Executive Summary Minimum Flows and
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CHAPTER 1 - PURPOSE & BACKGROUND OF
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1) flood flows that determine the b
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the area." What constitutes "signif
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Table 1-1 Rule-of-Thumb Estimates f
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this report identifies specific res
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1.6 Content of Remaining Chapters I
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CHAPTER 2 - WATERSHED CHARACTERISTI
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# # # circular vent 1.8 meters in d
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Figure 2-5 1970s Aerial with 1999 U
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is a variation of the Seminole word
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Figure 2-6 Hurricane Tracks near Ba
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varied by period. The variation was
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2.3.2 Baseline Period Figure 2-10 i
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found (ktau p=0.06) between total g
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similarly across the springsheds ex
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Figure 2-15 Wavelet Filtered Discha
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Figure 2-16 INTB Groundwater Model
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2.6 Seasonal Blocks As described in
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Table 2-6 Median (cfs) Flow by Bloc
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# # # Surface waters in this stretc
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3.1.3 Segmentation Segmentation was
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Figure 3-5 Dominant SAV and Median
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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 +
Page 76 and 77: Additional exploratory attempts usi
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Page 80 and 81: A regression of the form below was
Page 82 and 83: Table 4-8 Median Water Quality of W
Page 84 and 85: Figure 4-10 Nitrate Concentration a
Page 86 and 87: CHAPTER 5 - BIOLOGICAL CHARACTERIST
Page 88 and 89: Figure 5-1 Principal Component Anal
Page 90 and 91: measured volume sampled which was t
Page 92 and 93: 5.2.2 Relation to inflow Response t
Page 94 and 95: Table 5-7 Location Response (km u )
Page 96 and 97: Table 5-9 Abundance Response to Inf
Page 98 and 99: animals can survive chronic exposur
Page 100 and 101: Figure 5-3 Number of Aerial Manatee
Page 102 and 103: Figure 5-5(a) Molluscan Presence /
Page 104 and 105: Table 5-11 Rank Order of Mollusc Ab
Page 106 and 107: Figure 5-5 Polymesoda caroliniana A
Page 108 and 109: Figure 6-1 Plankton Tow Flows Compa
Page 110 and 111: In application, a baseline area and
Page 112 and 113: 6.1.4 Benthos Protection for benthi
Page 114 and 115: Figure 6-3. Location of the Three P
Page 116 and 117: 7.2 Manatee Approach Establishing a
Page 118 and 119: Figure 7-2 Joint Probability of Occ
Page 120 and 121: Figure 7-3 Maximum Day Manatee Usag
Page 122 and 123: Figure 7- 6 Example Calculations fo
Page 124 and 125: Figure 7- 7 Estimation of Flow Redu
Page 128 and 129: The reductions in flow that meet th
Page 130 and 131: probably accounts in part for the d
Page 132 and 133: Postel, S. and B.Richter. 2003. Riv
Page 134 and 135: Stanford, J.A., J.V.Ward, W.J. Liss
Page 136 and 137: Culter, J.K. 1986. Water Chemistry.
Page 138 and 139: CHAPTER 10 - APPENDICES 10.1 Append
Page 140 and 141: The wavelet used is the symmlets wa
Page 142 and 143: explains, the energy plot shows the
Page 144 and 145: 0 if no significant withdrawal Z =
Page 146 and 147: One advantage of using this regress
Page 148 and 149: Technical Memorandum January 22, 20
Page 150 and 151: Lecanto 1 & 2 #S Well Site Descript
Page 152 and 153: Figure 4. HSPF subbasins in the INT
Page 154 and 155: Most of the limestone mines located
Page 156 and 157: 3.1.3 Septic Tank Recharge in the S
Page 158 and 159: Figure 10. Groundwater grid in the
Page 160 and 161: Basso, R.J., 2004, Hydrogeologic Se
Page 162 and 163: 10.2 Appendices - Chapter 3 Appendi
Page 164 and 165: 10.3 Appendices - Chapter 4 Appendi
Page 166 and 167: Appendix 4-2 Data Sources Water qua
Page 168 and 169: Appendix 4-3 Water Quality Trend Gr
Page 170 and 171: Water Quality Trend Graphics, conti
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Water Quality Trend Graphics, conti
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Water Quality Trend Graphics, conti
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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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