The Determination of Minimum Flows for Sulphur Springs, Tampa

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DRAFT presented in this report. Dissolved oxygen is also measured at three continuous recorders operated by Tampa Bay Water at Sligh Avenue, Columbus Avenue and the Crosstown Expressway (kilometers 10.6, 3.7, and 0.2 respectively). However, the DO data presented below are limited to vertical profile measurements included in the three data sets first described, due to their large number of observations and good spatial coverage in the area between the dam and Sulphur Springs. DO concentrations in the Lower Hillsborough River are related to the amount of freshwater inflow, particularly in the reach of the river above Sulphur Springs. Box and whisker plots of surface and bottom DO data in segments of the river taken from the combined Tampa Bay Water HBMP/HIMP data are presented in Figure 3-22 for flow and no-flow conditions at the Hillsborough River dam. Different patterns are observed between the upstream and downstream reaches of the lower river. Downstream of km 7, the distribution of surface DO values is generally higher for no-flow conditions. Conversely, upstream of Sulphur Springs (km 12.9), surface DO values are higher for flow conditions at the dam. A similar pattern holds for bottom DO values in the HBMP/HIMP data - values for no-flow conditions are higher below km 7 and values for flow conditions are higher above km 13. It should be noted that bottom DO concentrations are lowest in the segment nearest to Sulphur Springs (km 12), which is probably related to the steep density gradients that occur there during no-flow conditions (Figures 3-13 and 3-16). Only some of these patterns are apparent in the box and whisker plots for the EPCHC stations (Figure 3-23), which for three of the stations represent a much longer period of record (Figure 3-12). In contrast to the HBMP/HIMP data, distributions of surface and bottom DO concentrations in the EPCHC data appear similar between flow and no-flow conditions at the two downstream stations (km 0.0 and km 3.5). An important similarity in the two data sets is they both show that surface and bottom DO concentrations improve with flow in the reach of the river above Sulphur Springs (upstream of km 13). At Sligh Avenue (km 10.6) the EPCHC data show a pattern similar to the HBMP in that surface DO values are similar between flow and no-flow conditions, while bottom DO concentrations are somewhat higher during flow conditions. These results reflect that the water column is highly stratified in this reach of the river during no-flow conditions, partly due to the effect of Sulphur Springs, which lowers salinity in the surface layers (Figure 3-16). The improvement in DO during flow conditions is likely due to the inclusion of high flow values in those data, which diminish vertical stratification at that location (Figures 3-18 and 3-19). 3.9.4 Effects of low flows on salinity distributions and dissolved oxygen concentrations between the dam and Sligh Avenue The effects of freshwater inflow will be examined throughout the river as part of the reevaluation of minimum flows for the Lower Hillsborough River. For the evaluation of minimum flows for Sulphur Springs, special attention is given in this report to the reach 3 - 42
DRAFT Figure 3-22 HBMP & EPCHC 2000 - 2002 Left Box < 3cfs | Right Box > 3cfs Surface DO Left Box < 3cfs | Right Box > 3cfs Bottom DO Figure 3-22. Box and whisker plots of surface and bottom dissolved oxygen concentrations in two-kilometer segments in the Lower Hillsborough River for flow and no flow conditions. Data taken from the HBMP and the EPCHC HIMP programs during 2000-2002. 3 - 43
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The Determination of Minimum Flows
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DRAFT TABLE OF CONTENTS List of Tab
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4.5 Goal 1 - Minimize the incursion
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DRAFT LIST OF FIGURES Chapter 2 - P
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Fig. 3-13 Fig. 3-14 Fig. 3-15 Fig.
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Fig. 5-7 Fig. 5-8 Fig. 5-9 Fig. 5-1
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Acronyms and Definitions DRAFT AMO
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DRAFT Executive Summary The Southwe
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DRAFT below 19 feet NGVD of 1929. T
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CHAPTER 1 PURPOSE AND BACKGROUND OF
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DRAFT water, or aquifer, provided t
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DRAFT one the indicators were the f
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DRAFT The spring and its run lie in
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DRAFT Figure 2-3. Recent photograph
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2 - 6 DRAFT
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DRAFT -5 -4 -3 -2 -1 0 1 2 3 0.4 4
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DRAFT 10.0 Yrly_Pumpage.grf 15 Annu
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DRAFT 1999 2000 2001 2002 2003 35 D
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DRAFT Figure 2-14. Return flow stru
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DRAFT 40 Jan. Feb. Mar. Apr. May Ju
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DRAFT due to withdrawals for public
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DRAFT Figure 2-19 . Temporal trend
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DRAFT Figure 2-20. Temporal trends
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DRAFT In comparison to specific con
Page 57 and 58: DRAFT average daily withdrawals for
Page 59 and 60: DRAFT Figure 2-25. Average specific
Page 61 and 62: DRAFT withdrawal rate of 31 cfs dur
Page 63 and 64: DRAFT Table 2-2. Sulphur Springs su
Page 65 and 66: DRAFT These plots indicate that his
Page 67 and 68: DRAFT CHAPTER 3 ECOLOGICAL RESOURCE
Page 69 and 70: DRAFT 3 Run_Riv_Stg.grf Water Surfa
Page 71 and 72: DRAFT 3.4 Salinity in the spring ru
Page 73 and 74: DRAFT 1999 2000 2001 2002 2003 2004
Page 75 and 76: DRAFT pumping events resulted in sa
Page 77 and 78: DRAFT As discussed in Section 2.5.3
Page 79 and 80: DRAFT tolerate and are frequently f
Page 81 and 82: DRAFT Appendix B are color coded to
Page 83 and 84: DRAFT habitat in the lower river pr
Page 85 and 86: DRAFT The FWC using a modified stra
Page 87 and 88: DRAFT increased with a return to no
Page 89 and 90: DRAFT 2000. The results from three
Page 91 and 92: DRAFT species (10 to 13) were colle
Page 93 and 94: DRAFT 1940 1950 1960 1970 1980 1990
Page 95 and 96: DRAFT . 1000.00 100.00 10.00 1.00 0
Page 97 and 98: DRAFT 3.9.2 The effects of flows fr
Page 99 and 100: DRAFT Data from the Tampa Bay Water
Page 101 and 102: DRAFT EPCHC Period of Record Data L
Page 103 and 104: DRAFT 35 30 1996 1997 1998 1999 200
Page 105 and 106: 7 DRAFT Elevation (m) 1 0 -1 -2 -3
Page 107: 8 24 25 29 DRAFT Figure 3-20, 3-21
Page 111 and 112: DRAFT of the river between the dam
Page 113 and 114: DRAFT 10 11 12 13 14 15 16 17 10 11
Page 115 and 116: DRAFT The HBMP project (PBSJ 2003)
Page 117 and 118: DRAFT xanthurus) red drum (Sciaenop
Page 119 and 120: DRAFT as manatees seek fresh water
Page 121 and 122: 1999 2000 2001 2002 DRAFT 35 TmpSS_
Page 123 and 124: DRAFT Platt Street 1974-2002 Columb
Page 125 and 126: DRAFT Median and minimum water temp
Page 127 and 128: DRAFT Figure 3-31 1999 2000 2001 20
Page 129 and 130: DRAFT Figure 3-33 2001 2002 2003 20
Page 131 and 132: DRAFT CHAPTER 4 TECHNICAL APPROACH
Page 133 and 134: DRAFT The sum of these consideratio
Page 135 and 136: DRAFT It is the conclusion of this
Page 137 and 138: DRAFT criteria. The
Page 139: DRAFT reach of the river 50 meters
Page 142 and 143: DRAFT of the dam. The experiments w
Page 144 and 145: DRAFT Salinity incursions above the
Page 146 and 147: DRAFT Figure 5-3. A - D. Box and wh
Page 148 and 149: DRAFT The results of the vertical p
Page 150 and 151: DRAFT Sulphur Springs < 33 cfs, Hil
Page 152 and 153: DRAFT Other breakpoints in the data
Page 154 and 155: DRAFT 40 Percent of Observations -
Page 156 and 157: DRAFT It is possible that infrequen
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DRAFT The effects of tide stage on
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DRAFT medians rise to near -0.2 fee
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DRAFT Sulphur Springs < 33 cfs, Hil
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DRAFT Sulphur Springs on salinity d
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7 29 DRAFT Elevation (m) 0/0cfs 1 0
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23 24 24 25 25 29 DRAFT Figures 14,
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DRAFT Viewed strictly from the infl
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DRAFT water removed would fluctuate
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DRAFT euryhaline, there were also m
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DRAFT 01/90 01/93 01/96 01/99 01/02
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DRAFT the intent of that condition
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DRAFT included inflows to the model
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DRAFT Flows for Sulphur Springs wer
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DRAFT ∆T represents the differenc
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DRAFT Figure 25 Temp (C) 22 Histori
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DRAFT Figure 26 Temp (C) 24 22 Hist
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DRAFT Similar to the coldest period
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DRAFT 5.7. Consideration of future
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DRAFT Culter, J. 1986. Benthic Inve
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DRAFT Shafland, P. L. and K. J. Foo
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APPENDIX A (from Chapter 2) Time se
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Sulphur Springs Water Quality 1991-
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Appendix B. Presence of macroinvert
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Appendix C. Percent composition of
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Appendix C. Percent composition of
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APPENDIX D (from Chapter 3) Percent
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APPENDIX D. Percent composition of
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APPENDIX D. Percent composition of
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APPENDIX E (from Chapter 3) Abundan
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BARE SAND FILAMENTOUS ALGAE COMBINE
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APPENDIX F - HILLSBOROUGH RIVER TEM
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Appendix G Daily values for mean, m
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APPENDIX H (from Chapter 5) Time se
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Experiment Number 6
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Appendix I Daily values for minimum
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28FEB2000 9.8 0.0 1.9 9.7 7.8 . 18.
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12FEB2001 14.0 3.5 1.7 4.6 2.9 1.1
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The Determination of Minimum Flows for Sulphur Springs, Tampa

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