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

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of 419 to 1015 cfs would be necessary to inundate the lowest major inflection point associated with maximizing floodplain inundation cfs (see Appendix RH). Corresponding flows at the USGS Lithia gage would range from 485 to 1239 cfs, with a mean of 786 cfs (Table 5-1). Table 5-1. Mean (SD) flows at the USGS Lithia gage required to inundate selected floodplain features and the maximum percentage flow reductions that would result in no more than a 15% reduction in the number of days the features are inundated. Critical Floodplain Feature/Criteria Mean (SD) Flow at Lithia gage (cfs) Maxiumum Flow Reduction at the Lithia gage (%) Low Bank Elevation 1160 (603) 5 Low Bank Elevation for inundation of both sides of river floodplain 2269 (652) 5 Highest floodplain vegetation 3551 (307) 5 class Mean elevation of swamp 981 (414) 7 classes Highest swamp class 1480 (778) 9 Floodplain wetted perimeter inflection point Mean elevation of hydric soils Highest elevation of hydric soils 786 (297) 9 1016 (381) 8 2043 (1270) 7 5-8
Wetted Perimeter (linear feet) 2000 1750 1500 1250 1000 750 500 250 0 Alafia River Transect 51: Floodplain Wetted Perimeter vs. Elevation Dry Hardwood Wet Hardwood Hammock Hardwood Swamp Bank 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 Elevation (feet NGVD) Figure 5-6. Floodplain wetted perimeter versus elevation at floodplain vegetation crosssection 51 (transect 51). Arrows indicate mean elevations for floodplain vegetation classes at the site. Hydric soils were identified at five of the eight floodplain vegetation cross-section sites (Figure 5-7). Where they occurred, hydric soils were found at significantly lower elevations than nonhydric (upland and non-hydric soils with flooding indicators) soils (Wilcoxon Sign Rank; S = 18; p < 0.01). Based on output from the HEC-RAS floodplain model, local flows of 404 to 1361 cfs would be necessary to inundate the mean hydric soil elevations (Appendix RH). Corresponding flows at the USGS Lithia gage would range from 520 to 1576 cfs, with a mean of 1016 cfs (Table 5-1). To inundate the highest-occurring hydric soils, flows of 526 to 4004 cfs (mean = 2043 cfs) would be required at the USGS Lithia gage site (Table 5-1). 5-9
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Alafia River Minimum Flows and Leve
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Table of Contents Table of Contents
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4.3.1 HEC-RAS Modeling ............
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Table of Figures Figure 1-1. Buildi
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Figure 2-33. Phosphorus concentrati
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Figure 5-12. Habitat Gain/Loss for
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Table 5-2. Mean elevation, local (c
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flow, with the exception that withd
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Acknowledgement The authors would l
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9) Water quality; and 10) Navigatio
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Water Management District typically
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Peace River at Zolfo Springs, FL. s
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Period of Record Median Daily Flows
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to enhance understanding of histori
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River watershed, to the east by the
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an adjacent area locally known as t
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Water in the surficial aquifer is r
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The Upper Floridan aquifer (UFA) sy
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Figure 2-4. May and September 2001
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head differences indicating breache
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data (multiple regression) analyses
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2.2 Land Use Changes in the Alafia
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Before discussing individual sub-ba
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Table 2-2. Land use and land cover
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Table 2-3. Land use and land cover
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Figure 2-13. 1972 and 1999 Land use
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2.2.4 Lithia Springs Sub-Basin The
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2.3 Hydrology The assessment of min
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occurred during the spring were sim
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Conversely, since most of the Unite
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extending from 1940 to 1969 can be
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third highest flow occurred early i
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Flow (cfs) Alafia River at Lithia,
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100 North Prong Alafia River at Key
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Flow (cfs) South Prong Alafia River
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Alafia River at Lithia - Water Qual
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South Prong Watershed Above USGS Ga
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Comparisons of land use changes and
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Comparison of Median Daily Flows fo
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Comparisons of Annual 25% Exceedanc
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Figure 2-25. Lithia Springs Major b
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2.3.4.3.2 Discharge from Lithia Spr
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Relationship Between Lithia Springs
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Buckhorn Spring Main Discharge (Wit
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versus flow. The third plot typical
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Alafia River at Lithia, FL Phosphor
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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
Page 105 and 106: Alafia River at Lithia, FL 14 Potas
Page 107 and 108: Table 2-10. Results of Kendall's ta
Page 109 and 110: Chapter 3 Ecological Resources of C
Page 111 and 112: 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
Page 119 and 120: 4.2.1 HEC-RAS Cross-Sections Cross
Page 121 and 122: PHABSIM analysis required acquisiti
Page 123 and 124: Figure 4-5. Upstream vegetation cro
Page 125 and 126: level, whenever possible. Immature
Page 127 and 128: major parameter altered during the
Page 129 and 130: Alafia River - Cross Section 64 - W
Page 131 and 132: Delphi method lacks the rapid feedb
Page 133 and 134: TOTAL DAYS OF INUNDATION DURING THE
Page 135 and 136: Period of Record Median Daily Flows
Page 137 and 138: Wetted Perimeter - USGS 84.5 - SWFW
Page 139 and 140: Alafia River Station 91.5 Stage in
Page 141 and 142: section sites and corresponding flo
Page 143 and 144: 4.9.1.2 Recreational Use Assessment
Page 145 and 146: 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
Page 151: 40 35 30 25 20 15 10 T20 T21 T27 T3
Page 155 and 156: dominant vegetation zones, mucky so
Page 157 and 158: 5.5.1 Application of PHABSIM for Bl
Page 159 and 160: 5.5.3 Flow Relationships with Woody
Page 161 and 162: River begins on October 28 and ends
Page 163 and 164: Table 5-4. Maximum monthly percent-
Page 165 and 166: 5.6.3 Short-Term Compliance Standar
Page 167 and 168: Table 5-5. Maximum monthly percent-
Page 169 and 170: 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
Page 187 and 188: The SWFWMD has employed a building
Page 189 and 190: MFLs for the Alafia and Myakka rive
Page 191 and 192: RALPH PLOTS AND ANALYSES Recent and
Page 193 and 194: then used to estimate percent of fl
Page 195 and 196: necessary. Such a framework should
Page 197 and 198: to use to meet the criteria of no s
Page 199 and 200: Shaw, D.T., C.N. Dahm, and S.W. Gol
Page 201 and 202: The District has added to Chapter 4
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Attachment A June 15 th , 2005 Mrs.
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The Kelly (2004) report includes a
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Figure 1. Box-and-whisker plots of
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As shown in Table 1, a nonparametri
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“augmentation” - be performed a
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Estuary Program 'Restoring the Bala
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APPENDIX D - District's response to
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educed by no more than 8 percent on
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sites with comparable temporal reco
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gradually removed (this appears as
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1) The DISTRICT acknowledges the ma
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Mark Hammond, Director, Resource Ma
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Table 1. Mann-Whitney Statistical A
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Comparison of July Rainfall Totals
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