Weeki Wachee River System Recommended Minimum Flows and ...

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Page Paragraph Line Comment 21 The reliance on just Wolf (1990) and Knochenmus and Yobbi (2001) as the only sources for Section 2-3 is somewhat disappointing. The District has published a number of excellent works that include significant information about the springshed. The Weeki Wachee springs and watershed have also been studied by the Florida Geological Survey and the USGS. Also, if this document is to deal with the MFLs for Twin Dees and Weeki Wachee (and perhaps Mud and Salt Springs as well), then considerably more information needs to be provided relative to the springshed and the regional geology. Again, while Mud and Salt Springs are mentioned several times prior to this section, we do not know what the magnitude of the springs are and whether or not they must be considered as part of the MFL process under Florida statutes. Perhaps this should be addressed in the report’s introduction. In addition, the District has funded a number of geophysical studies through the University of South Florida that document a salt-water transition zone along the Springs Coast. The position of the salt-water transition zone is important to know because it explains why Mud and Salt springs are salty and why Weeki Wachee Spring is not. Also, the potentiometric surfaces that are developed twice a year by the District in cooperation with the U.S. Geological Survey show reentrants and salients that correspond to the saline- and fresh-water springs along the coast. It is important to understand and explain this plumbing system in simple terms because it affects the behavior of the river, the estuary and the springs. 32
Page Paragraph Line Comment 21 1 The platform to which the District’s report is referring is known as the “Florida Platform” and that term should be utilized throughout because there are other names for other features that utilize the term platform in Florida. Also, the sentence that starts with “The limestone and dolomite…” should read “The near surface limestone and dolostone….” Dolostone is a better term than dolomite for the rock. These strata were deposited between the beginning of the Eocene Epoch at 55 (not 58) million years ago and early Miocene time ending at approximately 15 million years ago. This would include the Tampa member of the Peace River formation. The Miocene Epoch extended to about 5 million years ago and was characterized by deposition of sand and clay deposits that are developed in portions of the springshed. These and the Tampa Member constitute the Hawthorn Group. The Floridan Aquifer is that portion of the Eocene to Miocene section that consists of limestone and dolostone, but is not the only material deposited during the Eocene and Miocene Epochs. 21 2 This section cries for a map showing the geomorphic features within the springshed. There are several that are very important including the Brooksville Ridge and the coastal dunes that underlie much of the modern town of Spring Hill. 22 The regressions shown in Figure 2-7 were made by the USGS to estimate spring discharges from water levels in the Weeki Wachee Well. It is important to know whether or not changes in the rating between the Weeki Wachee Well and discharge at the springs has any effect on the long term data. Obviously, the differences in the regressions over time suggest that something has changed. What was it? 26 1 13 The sentence states that Figure 2-13 depicts the pumpage in Hernando County as an example of the accumulation of pumpage within the springshed. The District should consider adding pumpage in Pasco county to this analysis since large wellfields that are within the springshed are located in Pasco County. The pumpage reflected in Figure 2-13 apparently does not include these wellfields and, therefore, minimizes the issue of pumpage as a controlling factor on the discharge from the spring. 33
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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
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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
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
Page 200 and 201: Nevertheless, a major concern with
Page 202 and 203: system grid is not totally orthogon
Page 204 and 205: In a hydrodynamic model study, one
Page 206 and 207: analysis was rather cursory. The Di
Page 208 and 209: (taxa) richness in the WWRS. If the
Page 210 and 211: Freshwater Habitats Approximately 1
Page 212 and 213: ERRATA and EDITORIAL COMMENTS Page
Page 214 and 215: Page Paragraph Line Comment 14 Some
Page 218 and 219: Page Paragraph Line Comment 26 The
Page 220 and 221: REFERENCES Alber, M. 2002. A Concep
Page 222 and 223: Richter, B. D., J. V. Baumgartner,
Page 224 and 225: the regression equation used to pre
Page 226 and 227: and the three independent approache
Page 228 and 229: The Southwest Florida Water Managem
Page 230 and 231: the model in terms of tides, salini
Page 232 and 233: Attachment 1 - Comparison of salini
Page 234 and 235: Figure 1. Predicted drawdown (feet)
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