Weeki Wachee River System Recommended Minimum Flows and ...

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Figure 7-2 Joint Probability of Occurrence – Weeki Wachee Thermal Regime Evaluations 1 0.1 Low Flow Scenario 1:50 Return Interval Therm_LoQ_Prob.grf 0.01 Joint Probability 0.001 0.0001 1E-005 Daily Joint Probability - Temperature, Flow and Tide Height 3-Day Moving Average 1E-006 9/11/00 10/11/00 11/10/00 12/10/00 1/9/01 2/8/01 3/10/01 4/9/01 1 Therm_HiQ_Prob.grf 0.1 Joint Probability 0.01 0.001 1:50 Return Interval High Flow Scenario Daily Joint Probability - Temperature, Flow and Tide Height 3-Day Moving Average 0.0001 9/20/04 10/20/04 11/19/04 12/19/04 1/18/05 2/17/05 3/19/05 4/18/05 ____________________________________________________________________________________________ Proposed Minimum Flows and Levels for Weeki Wachee River Technical Approach Page 103 of 164
The loss of thermal refuge was determined for a range of assumed flow reductions (e.g. 5, 10, 25 and 50 percent) applied to the adjusted baseline flows. The results are given in Table 7-2. While shallower minimum depths (ca 2.7 feet) can be justified (Worthy, 2005) refuge volume and area were determined for a minimum depth of 3.8 feet (Rouhani et. al. 2006) for comparison with the Blue Springs evaluation. As stated in Chapter 6, initially the intention was establish a 15% loss criterion, but based on manatee usage in Blue Springs Florida the area and volume of refuge remaining even after significant flow reductions are much more than adequate for the relatively small population of animals using the Weeki Wachee and are adequate for the entire northwest Florida manatee population. Table 7-2 Thermal Refuge Reductions Due to Reduced Flows 3.8 ft Min. % Flow High Flow Scenario Low Flow Scenario Reduction Volume (m 3 ) Area (m 2 ) Volume (m 3 ) Area (m 2 ) 0 92,000 37,200 55,700 27,500 5 85,900 34,900 46,100 21,100 10 77,400 33,500 37,900 18,200 25 43,000 18,900 11,300 6,000 50 27,400 10,700 - - WW_Refuge.xls Several pertinent benchmarks can be characterized from the manatee usage of Blue Springs (ibid) which has been monitored on a regular basis since 1978. Figure 7-3 provides insight into actual space utilization during the day of maximum density of each manatee season for the period 1981-2001. Figure 7-4 depicts the density on the coldest day or each manatee season for the same period. The combined results suggest an areal use rate of between 0.006 and 0.010 manatee / ft 2 (15- 9 m 2 / animal). The more conservative usage (15 m 2 /manatee) was used to estimate the number of animals that could be supported by the baseline and reduced refuge areas presented in Table 7-2. The results are given in Figure 7-5 along with estimates based on volume usage (3.1 m 3 /animal) reported for Blue Springs. Based on a comparison of current use and refuge available within the Weeki Wachee, an MFL was not proposed for the purpose of manatee protection in the Weeki Wachee River. ____________________________________________________________________________________________ Proposed Minimum Flows and Levels for Weeki Wachee River Technical Approach Page 104 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
Page 68 and 69: Figure 4-5. Median Bottom Salinity
Page 70 and 71: Figure 4-7 Salinity Range (1984-200
Page 72 and 73: uncovering in response to strong wi
Page 74 and 75: E) Salinity = β o + β 1 *Flow 2 +
Page 76 and 77: Additional exploratory attempts usi
Page 78 and 79: 86 = 186 cfs, SWFWMD 1994-96 = 167
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 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 126 and 127: Figure 7-8. Summary Results for the
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
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Appendix 4-3 Water Quality Trend Gr
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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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