Weeki Wachee River System Recommended Minimum Flows and ...

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Lecanto 1 & 2 #S Well Site Description #S Unconfined UFAS #S TR20-2 #³ Semi-confined UFAS #Y Perched Water Table with confined UFAS Note: * Surficial Sand Unsaturated Engle Park #S Unconfined UFAS 2W #S #³ SR52W #Y Spring Hill 98* #S 2NW #S 1N 1NW #S #S #³ 1SW Locally Perched Water Table Weeki 11 #Y 2NE #S 3E #³ BR-2 #Y Brooksville East #Y #Y San Antonio Park 99X* #S BR-3 #Y LB-12 #³ #³ Mascotte #Y SR 577 Semi-confined UFAS Figure 2. Location of hydrogeological provinces within the Northern Tampa Bay area (Basso, 2004). surrounding area is the Integrated Northern Tampa Bay model. The construction and calibration of this model was part of a cooperative effort between the SWFWMD and Tampa Bay Water, a regional water utility that operates 11 major wellfields in the area. The Integrated Northern Tampa Bay (INTB) Model covers a 4,000 square-mile area of the Northern Tampa Bay region (Figure 3). An integrated model represents the most advanced simulation tool available to the scientific community in water resources investigations. It combines the traditional ground-water flow model with a surface water model and contains an interprocessor code that links both systems. One of the many advantages of an integrated model is that it simulates the entire hydrologic system. It represents the “state-of-art” tool in assessing changes due to rainfall, drainage alterations, and withdrawals. The model code used to run the INTB simulation is called the Integrated Hydrologic Model (IHM) which combines the HSPF surface water code and the MODFLOW ground-water code using interprocessor software. During the INTB development phase, several new enhancements were made to move the code toward a more physically-based simulation. The most important of these enhancements was the partitioning of the surface into seven major land use segments: urban, irrigated land, grass/pasture, forested, open water, wetlands, and mining/other. For each land segment, parameters were applied in the HSPF model consistent ____________________________________________________________________________________________ Proposed Minimum Flows and Levels for Weeki Wachee River Page 135 of 164 Appendices
Figure 3. Groundwater grid used in the INTB model. with the land cover, depth-to-water table, and slope. Recharge and ET potential were then passed to each underlying MODFLOW grid cell based on an area weighted-average of land segment processes above it. Other new software improvements included a new ET algorithm/hierarchy plus allowing the model code to transiently vary specific yield and vadose zone storages. The INTB model contains 172 subbasin delineations in HSPF (Figure 4). There is also an extensive data input time series of 15-minute rainfall from 300 stations for the period 1989-1998, a well pumping database that is independent of integration time step (1-7 days), a methodology to incorporate irrigation flux into the model simulation, construction of an approximate 150,000 river cell package that allows simulation of hydrography from major rivers to small isolated wetlands, and GIS-based definition of land cover/topography. An empirical estimation of ET was also developed to constrain model derived ET based on land use and depth-to-water table relationships. The MODFLOW gridded domain of the INTB contains 207 rows by 183 columns of variable spacing ranging from 0.25 to one mile. The groundwater portion is comprised of three layers: a surficial aquifer (layer 1), an intermediate confining unit or aquifer (layer 2), and the Upper Floridan aquifer (layer 3). The model simulates leakage between layers in a quasi-3D manner through a leakance coefficient term. ____________________________________________________________________________________________ Proposed Minimum Flows and Levels for Weeki Wachee River Page 136 of 164 Appendices
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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 +
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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
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 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 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
Page 180 and 181: United States Department of the Int
Page 182 and 183: October 8,2008 Florida Fish and Wil
Page 184 and 185: Martin Kelly, Ph.D. Page 3 October
Page 186 and 187: Scientific Peer Review of the Propo
Page 188 and 189: Determining a low flow need during
Page 190 and 191: Current state water policy, as expr
Page 192 and 193: Spring, Twin Dees Spring and possib
Page 194 and 195: under varying flow regimes. The fir
Page 196 and 197: Weeki Wachee Rainfall, Springflow a
Page 198 and 199: 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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