Weeki Wachee River System Recommended Minimum Flows and ...

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probably accounts in part for the diminishing r 2 values associated with the higher salinity isohalines. The location of the higher isohalines during high flow conditions is beyond the domain of the volume and area by river kilometer regressions which were truncated at Rkm =0. Thus, estimation of volume (or area) is based on extrapolation of the14 ppt results from inside the river mouth. Given these uncertainties and in order not to unduly weight the higher isohalines, it was decided to establish the Weeki Wachee MFL on the mean percent of flow reduction. The mean of all criteria utilized is 10.1 percent for the Block 1 period and is 10.7 percent for the Block 3 period. 8.2 Compliance Standards and Recommended Minimum Flows for the Weeki Wachee System. In consideration of the results presented, it is recommended that both the wet season and dry season flows for the Weeki Wachee River system be maintained at 90 % of the baseline flows adjusted for anthropogenic impacts. In the absence of consistent, longterm flow measurements for Mud Springs, Salt Springs, Mud River, Jenkins Springs or Twin Dees Spring. to evaluate these individually, the assumed MFL for these waterbodies is also a ten percent reduction in baseline flows. Long-term compliance standards in the form of five and ten year mean and median flows were developed to accommodate variations in climate. These minimum long-term flow statistics should be maintained in the presence of withdrawals. In order to define the compliance standards and to accommodate variations in climate, the recommended MFL (10% reduction) was applied to the adjusted baseline flows and the average daily flow for each calendar year was calculated for the years1967 through 2004. Next a running five year average was determined from these annual averages for the period of record and the minimum five year period identified. The process was repeated for a ten year moving average. Finally the procedure was repeated using the median daily flow for the years 1967 through 2004. The results are given in Table 8-2. Table 8-2 Long-Term Minimum Flows Corresponding to Recommended MFL Minimum Criterion Flow (cfs) Minimum 10 yr Moving Average (Based On Annual Average Flows) 141 Minimum 10 yr Moving Average (Based On Annual Median Flows) 131 Minimum 5 yr Moving Average (Based On Annual Average Flows) 136 Minimum 5 yr Moving Average (Based On Annual Median Flows) 128 ____________________________________________________________________________________________ Proposed Minimum Flows and Levels for Weeki Wachee River Conclusions and Recommendations Page 116 of 164
CHAPTER 9 - LITERATURE CITED 9.1 Literature Cited - Chapter 1 Beecher, H. 1990 Standards for Instream Flows. Rivers 1(2); 97-09 Brooks, G. P. and R.S. Barcikowski, 1994 A New Sample Size Formula for Regression. Presented at the Annual Meeting of the American Education Research Association. New Orleans, LA April 1994. Comrey, A.L. and H.B. Lee 1992. A First Course in Factor Analysis. Lawrence Erlbaum Associates, Publishers. Hillsdale, NJ. (page 243) Dunbar, M.J., A.Gustard, M.C. Acreman and C.R. Elliot. 1998 Overseas approaches to setting river flow objectives. Institute of Hydrology. R&D Technical Report W6-161. Oxon, England. 83 pp. Flannery, M.S., E.B. Peebles and R.T. Montgomery. 2002. A Percent-of-Flow approach to managing reductions in freshwater inflows from unimpounded rivers to Southwest Florida estuaries. Estuaries 25(68); 1318-1332 Gore, J.A., C.Dahm and C. Klimas. 2002. A Review of "Upper Peace River: An Analysis of Minimum Flows and Levels", Southwest Florida Water Management District, Brooksville, Florida. Hill, M.T., W.S. Platts, and R.L. Beschta. 1991. Ecological and geological concepts for instream and out-of-channel flow requirements. Rivers 2(3): 198-210. Hupalo, R., C. Neubauer, L. Keenan, D. Clapp and E. Lowe. 1994. Establishment of minimum flows and levels for the Wekiva River system. Technical Publication SJ94-1. St. Johns River Water Management District. Palatka, Florida. Jowett, I.G. 1993. Minimum flow requirements for instream habitat in Welllington rivers. NZ Freshwater Miscellaneous Report No. 63. National Institute of Water and Atmospheric Research, Christchurch. 33 pp. McDonald, T.C., E.B. Peebles, M.F.D. Greenwood, R.E. Matheson and R.H. McMichael, Jr. 2006. Freshwater inflow effects on fishes and invertebrates in the Hillsborough River Estuary. Prepared for Southwest Florida Water Management District by Florida Fish and Wildlife Conservation Commission. February, 2006. Park, C.N. and A.L. Dudycha.1974. A Cross-Validation of regression models. Journal of the American Statistical Association. 69. 214-218. Cited in Brooks and Bacikowski, 1994. ____________________________________________________________________________________________ Proposed Minimum Flows and Levels for Weeki Wachee River Literature Cited Page 117 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 +
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Additional exploratory attempts usi
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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 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 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
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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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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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