The Determination of Minimum Flows for Sulphur Springs, Tampa

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DRAFT The experimental withdrawals ended on July 5, 2002 when high river flows returned to the spillway at the Hillsborough River dam. Due to an unusually wet year, there was nearly continuous river flow at the Hillsborough River through the remainder of 2002 and all of 2003. Consequently, diversions of spring water to the base of the dam were not necessary to meet minimum flows at the dam. Additional experimental withdrawals to evaluate minimum flows for Sulfur Springs were also not conducted because the river was usually fresh near the spring mouth. Experiments that involved diverting various amounts of water to the base of the dam were conducted during the spring of 2004, during a two-month period when there was no flow from the reservoir. The findings of these flow experiments will be included in the re-evaluation of the minimum flow for the Lower Hillsborough River scheduled for 2005. 2.5.3 Concentrations and trends of other constituents Summary statistics for water quality parameters measured monthly in the spring pool by the City of Tampa are presented in Table 2-2 for the years 2001-2002. As is characteristic of Florida springs, the water in the spring pool typically has very low levels of color, turbidity, and total suspended solids. Total organic carbon and biochemical oxygen demand (BOD) concentrations are also low. Although water clarity is not measured in the pool, the water generally appears to be very clear, again typical of spring discharge. The average temperature of the spring water is 25.1 degrees Celsius (77.2 degrees Fahrenheit), with only minor seasonal variation. There are typically low levels of dissolved oxygen in the spring pool; with a median concentration of 1.78 mg/l. Ground water discharges are frequently low in dissolved oxygen, and the occurrence of dissolved oxygen in Sulphur Springs may be partly due to circulation and aeration that occurs within the spring pool. Photosynthesis by attached algae, which can become dense on the sides and bottom of the pool, may also contribute to high dissolved oxygen concentrations that are periodically observed. Nutrients in the spring pool are generally low, but do indicate some nutrient enrichment. The median nitrate nitrogen concentrations in the pool were 0.25 mg/l during 2001- 2002, with an inter-quartile range (25 th to 75 th percentile) of 0.19 to 0.73 mg/l. The median total nitrogen concentration was 0.72 mg/l, with inter-quartile range of 0.53 to 1.45 mg/l. By comparison, Friedman and Hand (1989) reported a median concentration of 1.2 for total nitrogen in Florida streams, with values of 0.70 and 1.9 mg/l for the 20 th and 80 th percentiles, respectively. The median total phosphorus concentration for Sulphur Springs (0.1 mg/l) was very similar to the median values reported for Florida streams (0.11 mg/l). 2 - 32
DRAFT Table 2-2. Sulphur Springs summary statistics for monthly water quality values reported by the City of Tampa for 2001 – 2002 (Uncensored). Parameter Units Minimum Mean Maximum 25th Percentile Median 75th Percentile Temperature o C 23.1 25.1 26.3 24.5 25.2 26.2 pH SU 6.98 7.24 7.78 7.03 7.22 7.7 Dissolved Oxygen mg/l 0.9 2.6 9.4 1.3 1.8 7.09 Turbidity NTU 0.2 0.6 3.4 0.3 0.4 2.2 Color PCU 7 16 40 9 12 37 Total Organic Carbon mg/l 0.50 2.52 4.40 1.95 2.53 4.33 BOD mg/l 0.0 2.5 9.7 2.0 2.0 9.4 Total Suspended Solids mg/l 1 2 16 1 1 7 Specific Conductance µmhos/cm 1,971 3,093 4,040 2,680 3,079 4,039 Salinity psu 0.74 1.56 4.42 1.32 1.44 2.67 Total Dissolved Solids mg/l 1,128 1,834 3,177 1,525 1,849 2,684 Sulfate mg/l 149 237 293 222 237 293 Chloride mg/l 412 795 1,060 727 791 1,044 Ammonia-N mg/l N 0.10 0.17 1.00 0.10 0.10 0.87 NO 3 -N mg/l N 0.05 0.29 0.88 0.19 0.25 0.73 NO 2 -N mg/l N 0.01 0.02 0.06 0.01 0.01 0.05 Kjeldahl-N mg/l N 0.10 0.36 0.60 0.28 0.40 0.60 Total Nitrogen mg/l N 0.39 0.73 1.81 0.53 0.72 1.45 Ortho Phosphorus mg/l P 0.05 0.10 0.50 0.05 0.09 0.26 Total Phosphorus mg/l P 0.10 0.16 0.50 0.10 0.10 0.40 2 - 33
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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
Page 10 and 11:
DRAFT LIST OF FIGURES Chapter 2 - P
Page 12 and 13: Fig. 3-13 Fig. 3-14 Fig. 3-15 Fig.
Page 14 and 15: Fig. 5-7 Fig. 5-8 Fig. 5-9 Fig. 5-1
Page 16 and 17: Acronyms and Definitions DRAFT AMO
Page 18 and 19: DRAFT Executive Summary The Southwe
Page 20: DRAFT below 19 feet NGVD of 1929. T
Page 24 and 25: CHAPTER 1 PURPOSE AND BACKGROUND OF
Page 26 and 27: DRAFT water, or aquifer, provided t
Page 28: DRAFT one the indicators were the f
Page 31 and 32: DRAFT The spring and its run lie in
Page 33 and 34: DRAFT Figure 2-3. Recent photograph
Page 35 and 36: 2 - 6 DRAFT
Page 37 and 38: DRAFT -5 -4 -3 -2 -1 0 1 2 3 0.4 4
Page 39 and 40: DRAFT 10.0 Yrly_Pumpage.grf 15 Annu
Page 41 and 42: DRAFT 1999 2000 2001 2002 2003 35 D
Page 43 and 44: DRAFT Figure 2-14. Return flow stru
Page 45 and 46: DRAFT 40 Jan. Feb. Mar. Apr. May Ju
Page 47 and 48: DRAFT due to withdrawals for public
Page 49 and 50: DRAFT Figure 2-19 . Temporal trend
Page 51 and 52: DRAFT Figure 2-20. Temporal trends
Page 53: 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: DRAFT withdrawal rate of 31 cfs dur
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 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
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DRAFT 10 11 12 13 14 15 16 17 10 11
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DRAFT The HBMP project (PBSJ 2003)
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DRAFT xanthurus) red drum (Sciaenop
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DRAFT as manatees seek fresh water
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1999 2000 2001 2002 DRAFT 35 TmpSS_
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DRAFT Platt Street 1974-2002 Columb
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DRAFT Median and minimum water temp
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DRAFT Figure 3-31 1999 2000 2001 20
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DRAFT Figure 3-33 2001 2002 2003 20
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DRAFT CHAPTER 4 TECHNICAL APPROACH
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DRAFT The sum of these consideratio
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DRAFT It is the conclusion of this
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DRAFT criteria. The
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DRAFT reach of the river 50 meters
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DRAFT of the dam. The experiments w
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DRAFT Salinity incursions above the
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DRAFT Figure 5-3. A - D. Box and wh
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DRAFT The results of the vertical p
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DRAFT Sulphur Springs < 33 cfs, Hil
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DRAFT Other breakpoints in the data
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DRAFT 40 Percent of Observations -
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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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Page 207 and 208:
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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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