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

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experts for initial evaluation. The proposed suitability curves were based on flow criteria for redbreast sunfish (Aho and Terrell 1986) modified according to published literature on the biology of spotted sunfish. Respondents were given approximately 30 days to review the proposed habitat suitability criteria and to suggest modifications. Six of the fourteen experts provided comments. In accordance with Delphi techniques, the suggested modifications were incorporated into the proposed curves. Suggested modifications that fell outside of the median and 25% interquartile range of responses were not considered unless suitable justification could be provided. Modified Type II habitat suitability criteria for the largemouth bass (Micropterus salmoides) and bluegill Lepomis macrochirus, two other common species in the Alafia River, were established using USFWS/USGS “blue book” criteria (Stuber et al. 1982). Curves for these species have been widely used in PHABSIM applications. Type III habitat suitability criteria for macroinvertebrate community diversity were established based on suitability curves published by Gore et al. (2001). Modified substrate and cover codes used for criteria development were established through consultation with SWFWMD and Florida Fish and Wildlife Conservation Commission personnel. For this effort, emphasis was placed on invertebrate preference for macrophytes, inundated woody debris and root wad habitats. 4.3.3 Recent and Long-term Positional Hydrographs Recent and Long-term Positional Hydrograph (RALPH) analyses are used to illustrate the number of days during a defined period of record that a specific flow or level (elevation) was equaled or exceeded at individual river cross-sections, including streamflow gaging sites (Figure 4-8). The plots are developed using measured elevations for habitats or other features and HEC-RAS model output. RALPH plots also allow examination of how future changes in flow could affect the number of days of inundation during a particular span of time (Figure 4-9). For the purpose of developing minimum flows and levels, percent-of-flow reductions that result in greater than a 15% reduction in habitat from historic conditions are characterized as limiting factors. 4-16
TOTAL DAYS OF INUNDATION DURING THE SRP WATER YEAR WHEN THE FLOW AT THE USGS LITHIA GAGE IS 200 CFS OR GREATER Total Days Flow Exceeded 350 300 250 200 150 100 50 0 1930 1950 1970 1990 Figure 4-8. RALPH plot of the number of days during the southern river pattern water year (SRPWY) that 200 cfs is exceeded at the USGS Lithia gage on the Alafia River. COMPARISON OF TOTAL DAYS OF INUNDATION DURING THE SRPWY WITH NUMBER OF DAYS AFTER 15% REDUCTION IN FLOW Total Days Flow Exceeded 350 300 250 200 150 100 50 0 1930 1950 1970 1990 Figure 4-9. RALPH plot of the number of days during the southern river pattern water year (SRPWY) that 200 cfs is exceeded at the USGS Lithia gage (orange line) compared with the number of days that inundation would have occurred if there had been a 15% reduction in river flows (blue line). 4-17
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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
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
Page 99 and 100: 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: Delphi method lacks the rapid feedb
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 and 152: 40 35 30 25 20 15 10 T20 T21 T27 T3
Page 153 and 154: Wetted Perimeter (linear feet) 2000
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
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The draft report for setting MFLs f
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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.
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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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