Alafia River Minimum Flows and Levels - Southwest Florida Water ...

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Figure 2-5. May 2001 observed water levels (feet NGVD) and depth to water table (in feet below land surface) in the surficial aquifer in the vicinity of the Alafia River. Vertical flows (recharge or discharge) to the IAS and UFA are dependent upon the thickness and integrity of the overlying confining units, the permeability of the confining unit sediments, and the water level or head difference between aquifers. When water levels in the surficial aquifer are higher than levels in the underlying aquifer, water moves downward to recharge the UFA/IAS. Conversely, when water levels in the surficial aquifer are lower, water moves upward, or is discharged from the UFA or IAS to the surficial aquifer. Hydraulic head differences between the UFA and surficial aquifer are highly variable, especially in the BKT, ranging from 2 feet to 90 feet in areas north of the river (Figure 2-6). This variability illustrates the highly karst nature of the BKT with low 2-11
head differences indicating breaches in the clay confining unit between aquifers. South of the Alafia, head differences are generally larger, ranging from 23 feet to 128 feet, and indicating a greater degree of confinement between the aquifers. For the most part, water levels in the SAS are consistently higher than levels in the IAS and UFA, indicating a downward flow gradient. Along the coast, this downward gradient is typically reversed with water from the UFA being discharged upward into the overlying aquifers. However, for much of southern coastal Hillsborough County, water levels in the UFA have declined due to groundwater withdrawals. This has resulted in a seasonal reversal of the vertical gradient between the aquifers. During the drier periods of the year (typically the spring months) water levels decrease with depth along the coast and water moves downward from the surficial aquifer. During the remainder of the year, water levels in the UFA are higher and the vertical movement of water resumes in an upward direction. Figure 2-6. Average observed head difference between the surficial aquifer and the Upper Floridan aquifer water levels (feet) in the vicinity of the Alafia River, based on period-of-record data. 2-12
Page 1 and 2: Alafia River Minimum Flows and Leve
Page 3 and 4: Table of Contents Table of Contents
Page 5 and 6: 4.3.1 HEC-RAS Modeling ............
Page 7 and 8: Table of Figures Figure 1-1. Buildi
Page 9 and 10: Figure 2-33. Phosphorus concentrati
Page 11 and 12: Figure 5-12. Habitat Gain/Loss for
Page 13 and 14: Table 5-2. Mean elevation, local (c
Page 15 and 16: flow, with the exception that withd
Page 17 and 18: Acknowledgement The authors would l
Page 19 and 20: 9) Water quality; and 10) Navigatio
Page 21 and 22: Water Management District typically
Page 23 and 24: Peace River at Zolfo Springs, FL. s
Page 25 and 26: Period of Record Median Daily Flows
Page 27 and 28: to enhance understanding of histori
Page 29 and 30: River watershed, to the east by the
Page 31 and 32: an adjacent area locally known as t
Page 33 and 34: Water in the surficial aquifer is r
Page 35 and 36: The Upper Floridan aquifer (UFA) sy
Page 37: Figure 2-4. May and September 2001
Page 41 and 42: data (multiple regression) analyses
Page 43 and 44: 2.2 Land Use Changes in the Alafia
Page 45 and 46: Before discussing individual sub-ba
Page 47 and 48: Table 2-2. Land use and land cover
Page 49 and 50: Table 2-3. Land use and land cover
Page 51 and 52: Figure 2-13. 1972 and 1999 Land use
Page 53 and 54: 2.2.4 Lithia Springs Sub-Basin The
Page 55 and 56: 2.3 Hydrology The assessment of min
Page 59 and 60: occurred during the spring were sim
Page 61 and 62: Conversely, since most of the Unite
Page 63 and 64: extending from 1940 to 1969 can be
Page 67 and 68: third highest flow occurred early i
Page 69 and 70: Flow (cfs) Alafia River at Lithia,
Page 71 and 72: 100 North Prong Alafia River at Key
Page 73 and 74: Flow (cfs) South Prong Alafia River
Page 75 and 76: Alafia River at Lithia - Water Qual
Page 77 and 78: South Prong Watershed Above USGS Ga
Page 79 and 80: Comparisons of land use changes and
Page 81 and 82: Comparison of Median Daily Flows fo
Page 83 and 84: Comparisons of Annual 25% Exceedanc
Page 85 and 86: Figure 2-25. Lithia Springs Major b
Page 87 and 88: 2.3.4.3.2 Discharge from Lithia Spr
Page 89 and 90:
Relationship Between Lithia Springs
Page 91 and 92:
Buckhorn Spring Main Discharge (Wit
Page 93 and 94:
versus flow. The third plot typical
Page 95 and 96:
Alafia River at Lithia, FL Phosphor
Page 97 and 98:
While elevated phosphorus concentra
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Peace River at Arcadia, FL 20 Phosp
Page 101 and 102:
Alafia River at Lithia, FL Nitrate/
Page 103 and 104:
2.4.2 Potassium and Trend Analysis
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Alafia River at Lithia, FL 14 Potas
Page 107 and 108:
Table 2-10. Results of Kendall's ta
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Chapter 3 Ecological Resources of C
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1) maintenance of minimum water dep
Page 113 and 114:
flow regimes and these life history
Page 115 and 116:
subsidy of water and nutrients that
Page 117 and 118:
Chapter 4 Technical Approach for Es
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4.2.1 HEC-RAS Cross-Sections Cross
Page 121 and 122:
PHABSIM analysis required acquisiti
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Figure 4-5. Upstream vegetation cro
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level, whenever possible. Immature
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major parameter altered during the
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Alafia River - Cross Section 64 - W
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Delphi method lacks the rapid feedb
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TOTAL DAYS OF INUNDATION DURING THE
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Period of Record Median Daily Flows
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Wetted Perimeter - USGS 84.5 - SWFW
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Alafia River Station 91.5 Stage in
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section sites and corresponding flo
Page 143 and 144:
4.9.1.2 Recreational Use Assessment
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Chapter 5 Results and Recommended M
Page 147 and 148:
greater than 25 cfs would inundate
Page 149 and 150:
For the USGS Lithia gage site, the
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40 35 30 25 20 15 10 T20 T21 T27 T3
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Wetted Perimeter (linear feet) 2000
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dominant vegetation zones, mucky so
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5.5.1 Application of PHABSIM for Bl
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5.5.3 Flow Relationships with Woody
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River begins on October 28 and ends
Page 163 and 164:
Table 5-4. Maximum monthly percent-
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5.6.3 Short-Term Compliance Standar
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Table 5-5. Maximum monthly percent-
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5.8 Short-Term Compliance Standard
Page 171 and 172:
Table 5-7. Proposed Minimum Flows f
Page 173 and 174:
Biological Services Program Report
Page 175 and 176:
Jones, G.W., and Upchurch, S.B., 19
Page 177 and 178:
SDI Environmental Services, Inc. 20
Page 179 and 180:
Upchurch, S.B. and J.R. Littlefield
Page 181 and 182:
A Review of “Alafia River Minimum
Page 183 and 184:
The draft report for setting MFLs f
Page 185 and 186:
methodologies, analyses, and conclu
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The SWFWMD has employed a building
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MFLs for the Alafia and Myakka rive
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RALPH PLOTS AND ANALYSES Recent and
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then used to estimate percent of fl
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necessary. Such a framework should
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to use to meet the criteria of no s
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Shaw, D.T., C.N. Dahm, and S.W. Gol
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The District has added to Chapter 4
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Attachment A June 15 th , 2005 Mrs.
Page 209 and 210:
The Kelly (2004) report includes a
Page 211 and 212:
Figure 1. Box-and-whisker plots of
Page 213 and 214:
As shown in Table 1, a nonparametri
Page 215 and 216:
“augmentation” - be performed a
Page 217 and 218:
Estuary Program 'Restoring the Bala
Page 219 and 220:
APPENDIX D - District's response to
Page 221 and 222:
educed by no more than 8 percent on
Page 223 and 224:
sites with comparable temporal reco
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gradually removed (this appears as
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1) The DISTRICT acknowledges the ma
Page 229 and 230:
Mark Hammond, Director, Resource Ma
Page 231 and 232:
Table 1. Mann-Whitney Statistical A
Page 233:
Comparison of July Rainfall Totals
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Alafia River Minimum Flows and Levels - Southwest Florida Water ...

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