The Determination of Minimum Flows for Sulphur Springs, Tampa

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DRAFT Other breakpoints in the data are apparent and could be used for the determination of minimum flows, depending on the management goals for the spring run. The 75 th percentile salinity values showed a breakpoint between 6 and 7 cfs. At 6 cfs, the median value is 2.1 ppt. However, the 75 th percentile value is 7.8 ppt, with a 90 th percentile value of 13.5 ppt. The median value for 7 cfs was 1.5 ppt, which is equal to median salinity of the spring run under normal flows. At 7cfs the 75 th percentile drops to 2.8 ppt, while the 90 th percentile value drops to 6.7 ppt. There were three times as many days of record with flows of 7 cfs (24 days) than there was for 6 cfs (8 days), so inferences about salinity for 7 cfs are probably more valid. The daily values listed in Appendix I can be used to determine on what days salinity incursions occurred for each flow rate. Differences in minimum and maximum salinity values in excess of 1.5 ppt can be used to indicate the movement of river water upstream of the weir on a sampling day. Using this criterion, salinity incursions occurred on 22 of the 26 days (85%) when flows were 7 cfs. Daily maximum salinity values in excess of 10 ppt occurred on six of the days that had incursions. As previously discussed, the 95 th percentile salinity values show a breakpoint between 12 and 13 cfs, dropping from 7.3 to about 3.3 cfs. There were 26 total days of record with flows of 13 cfs. Salinity incursions occurred on nearly half (46%) of those days, with maximum salinity values in excess of 10 ppt occurring on four of the incursions. The number of days there were salinity incursions equal to or greater than 5 or 10 ppt are summarized in Table 5-2 for flow classes greater than 5 cfs, along with statistics for the durations of these incursions. The percentage of the 15 minute observations that exceeded 5 or 10 ppt are also listed in Table 5-2 and illustrated in Figure 5-6. Similar to the results shown in the box and whisker plots, there are breakpoints in the percent of observations over 5 ppt at 7, 13, and 18 ppt. As discussed earlier, the occurrence of high salinity values at flows above 20 cfs are due to large changes in flows during those days that are masked by the average flow value, or are due to unusually high tides during a flow of 26 cfs. Excluding these outliers, the percent of observations above 5 ppt never exceeded 4% at flows above 13 cfs, and were zero at flows above 18 cfs. 5 - 12
DRAFT Table 5-2 Number of days and durations of salinity incursions greater than or equal to 5 ppt and 10 ppt at the recorder in the upper spring run. Percent >=5ppt Number of 'Days' of Incursions >= 5 ppt Average Hrs per 'Day' Longest Duration Hours >= 5ppt Median Duration Hours >= 5ppt Percent >=10 ppt Number of 'Days' of Incursions >= 10 ppt Average Hrs per 'Day' Longest Duration Hours >= 10 ppt Median Duration Hours >= 10 ppt 1 93.2 72.7 2 32.4 8.7 3 37.1 15.9 4 45.4 19.8 5 36.5 15.5 6 32.7 7 9.0 18.5 4.0 20.1 6 6.4 15.8 2.0 7 14.2 14 5.9 19.0 1.3 6.3 6 6.0 13.0 3.8 8 9.2 5 3.1 5.3 2.0 0.0 0 0.0 0.0 0.0 9 11.8 7 4.5 8.5 2.3 1.8 2 2.4 4.3 2.4 10 4.4 4 3.9 4.8 1.6 0.0 0 0.0 0.0 0.0 11 7.4 6 4.8 7.8 2.0 1.5 2 2.9 4.8 2.8 12 8.0 10 4.4 5.8 4.0 1.6 5 1.8 3.0 1.4 13 3.9 7 3.5 7.0 2.5 1.4 4 2.2 4.5 1.6 14 1.5 2 3.5 4.5 3.5 0.1 1 0.5 0.8 0.8 15 3.4 3 3.3 5.0 2.1 1.2 3 1.2 1.5 0.9 16 3.0 1 4.3 4.3 4.3 0.9 1 1.3 1.3 1.3 17 2.7 2 3.6 6.8 0.3 1.7 1 4.5 4.5 4.5 18 0.0 0 0.0 0.0 0.0 0.0 0 0.0 0.0 0.0 19 0.0 0 0.0 0.0 0.0 0.0 0 0.0 0.0 0.0 20 0.0 0 0.0 0.0 0.0 0.0 0 0.0 0.0 0.0 21 0.0 0 0.0 0.0 0.0 0.0 0 0.0 0.0 0.0 22 4.1 1 14.8 14.8 14.8 1.4 1 5.0 3.3 2.5 23 0.0 0 0.0 0.0 0.0 0.0 0 0.0 0.0 0.0 24 0.0 0 0.0 0.0 0.0 0.0 0 0.0 0.0 0.0 25 0.0 0 0.0 0.0 0.0 0.0 0 0.0 0.0 0.0 26 0.1 1 1.3 1.3 1.3 0.0 0 0.0 0.0 0.0 27 0.3 1 2.8 2.8 2.8 0.0 0 0.0 0.0 0.0 5 - 13
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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
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DRAFT average daily withdrawals for
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DRAFT Figure 2-25. Average specific
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DRAFT withdrawal rate of 31 cfs dur
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DRAFT Table 2-2. Sulphur Springs su
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DRAFT These plots indicate that his
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DRAFT CHAPTER 3 ECOLOGICAL RESOURCE
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DRAFT 3 Run_Riv_Stg.grf Water Surfa
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DRAFT 3.4 Salinity in the spring ru
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DRAFT 1999 2000 2001 2002 2003 2004
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DRAFT pumping events resulted in sa
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DRAFT As discussed in Section 2.5.3
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DRAFT tolerate and are frequently f
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DRAFT Appendix B are color coded to
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DRAFT habitat in the lower river pr
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DRAFT The FWC using a modified stra
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DRAFT increased with a return to no
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DRAFT 2000. The results from three
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DRAFT species (10 to 13) were colle
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DRAFT 1940 1950 1960 1970 1980 1990
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DRAFT . 1000.00 100.00 10.00 1.00 0
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DRAFT 3.9.2 The effects of flows fr
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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 and 108: 8 24 25 29 DRAFT Figure 3-20, 3-21
Page 109 and 110: DRAFT Figure 3-22 HBMP & EPCHC 2000
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 154 and 155: DRAFT 40 Percent of Observations -
Page 156 and 157: DRAFT It is possible that infrequen
Page 158 and 159: DRAFT The effects of tide stage on
Page 160 and 161: DRAFT medians rise to near -0.2 fee
Page 162 and 163: DRAFT Sulphur Springs < 33 cfs, Hil
Page 164 and 165: DRAFT Sulphur Springs on salinity d
Page 166 and 167: 7 29 DRAFT Elevation (m) 0/0cfs 1 0
Page 168 and 169: 23 24 24 25 25 29 DRAFT Figures 14,
Page 170 and 171: DRAFT Viewed strictly from the infl
Page 172 and 173: DRAFT water removed would fluctuate
Page 174 and 175: DRAFT euryhaline, there were also m
Page 176 and 177: DRAFT 01/90 01/93 01/96 01/99 01/02
Page 178 and 179: DRAFT the intent of that condition
Page 180 and 181: DRAFT included inflows to the model
Page 182 and 183: DRAFT Flows for Sulphur Springs wer
Page 184 and 185: DRAFT ∆T represents the differenc
Page 186 and 187: DRAFT Figure 25 Temp (C) 22 Histori
Page 188 and 189: DRAFT Figure 26 Temp (C) 24 22 Hist
Page 190 and 191: DRAFT Similar to the coldest period
Page 192 and 193: DRAFT 5.7. Consideration of future
Page 194 and 195: DRAFT Culter, J. 1986. Benthic Inve
Page 196 and 197: DRAFT Shafland, P. L. and K. J. Foo
Page 199 and 200: APPENDIX A (from Chapter 2) Time se
Page 201 and 202: Sulphur Springs Water Quality 1991-
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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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