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

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Figure 4-3. Location of eleven shoals identified on the Alafia River. 4.2.2 PHABSIM Cross Sections Physical Habitat Simulation (PHABSIM) cross-sections, designed to quantify specific habitats for fish and macroinvertebrates at differing flow conditions, were established at two sites on the Alafia River, at one site in Buckhorn Creek and at one site in the Lithia Springs Major run. Alafia River cross-sections were situated at an upstream site, near Aldermans Ford Park and at a downstream site, near the USGS Lithia gage at the bridge on Lithia Pinecrest Road. The upstream site was representative of shallow portions of the river and was bounded by low banks. The downstream site was located in the more incised portion of the river. The cross-sections in Buckhorn Creek were located about 100 yards downstream from Buckhorn Springs Main and the Lithia Springs cross-sections were located in the short spring run between Lithia Springs Major and the Alafia River. 4-4
PHABSIM analysis required acquisition of field data concerning channel habitat composition and hydraulics. At each PHABSIM site, tag lines were used to establish three cross-sections across the channel to the top of bank on either side of the river. The three cross-sections were sited to include a riffle, pool and run sequence. Water velocity was measured with a Marsh-McBirney Model 2000 flow meter at two or four-foot intervals along each cross-section. Stream depth, substrate type (sand, bedrock, mud, snags, exposed roots, snags, aquatic and terrestrial vegetation) and habitat cover (present or absent) were recorded along the cross-sections. Other measured hydraulic descriptors included channel geometry (ground elevations), water surface elevations across the channel and water surface slope determined from points upstream and downstream of the cross-sections. Data were collected under a range of flow conditions (low, medium and high flows) to provide the necessary information needed to run the PHABSIM model for each stream reach. 4.2.3 Instream Habitat Cross Sections Cross-sections for assessing instream habitats were examined at eight sites in the Alafia River corridor. Triplicate instream cross sections, from the top of bank on one side of the channel through the river and up to the top of bank on the opposite channel, were established at each site perpendicular to flow in the channel. One of the three cross-sections at each site was situated along the floodplain vegetation transect line. Replicates were located 50 ft upstream and downstream. A total of 24 instream cross sections were sampled (8 crosssections x 3 replicates at each site). For each instream habitat cross-section, the range in elevation and linear extent (along the cross-section) of the following habitats were determined: • bottom substrates (which was comprised by a combination of either sand, mud, or bedrock); • exposed roots; • snags or deadwood; • wetland plants; and • wetland trees. 4.2.4 Floodplain Vegetation Cross Sections Floodplain cross-sections (transects) based on the location of vegetation communities identified from USGS Gap Analysis Program (GAP) maps were established to characterize wetlands and soils within the Alafia River corridor. For cross-section site selection, the river corridor was stratified into upstream and downstream reaches based on differences in dominant vegetation types. Eight representative floodplain vegetation cross-sections; four each in the downstream 4-5
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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
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
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: 4.2.1 HEC-RAS Cross-Sections Cross
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 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
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Table 5-7. Proposed Minimum Flows f
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Biological Services Program Report
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Jones, G.W., and Upchurch, S.B., 19
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SDI Environmental Services, Inc. 20
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Upchurch, S.B. and J.R. Littlefield
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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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