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

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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 Figure 4-10. Approximate representations of flow blocks (Blocks 1, 2 and 3) projected onto a plot of median daily flows (Julian day) recorded between 1970 and 1999 at the USGS Lithia Gage at the Alafia River. ....................4-19 Figure 4-11. Discharge at HEC-RAS transect number 84.5 (Shoal 9). Wetted perimeter values for the entire range of modeled flows are shown in the upper plot; values for modeled flows up to 200 cfs are shown in the lower plot...4-21 Figure 4-12. Stage flow relationships between HEC-RAS cross-section 91.5 and flow at RS 60 cross-section (USGS Lithia gage) derived from the HEC-RAS model of the Alafia River corridor. The upper-right plot shows the relationship derived for the entire range of flows evaluated. The other three show relationships used to develop regression equations for selected portions of the flow range. ...........................................................................................4-23 Figure 4-13. Photo of Lithia Spring Major pool being utilized for recreation......4-28 Figure 5-1. Plot of local flow required to inundate the deepest part of the channel at each HEC-RAS cross-section to a depth of 0.6 ft. A local flow of 41.75 cfs at the limiting site (cross-section 60) is the equivalent of 59 cfs at the Lithia gage.............................................................................................................5-2 Figure 5-2. Plot of local flow required to inundate the lowest wetted perimeter inflection point at each HEC-RAS cross-section. .........................................5-3 Figure 5-3. Plot of predicted habitat gain/loss for largemouth bass fry based on the flow record from 1940 to 1969 and flow reductions of 10, 20, 30, and 40 percent.........................................................................................................5-4 Figure 5-4. Elevation profile for floodplain vegetation cross-section (transect) 49. Distances (cumulative length) are shown centered on the middle of the river channel. .......................................................................................................5-6 Figure 5-5. Mean elevations of six vegetation classes at eight Alafia River floodplain cross-sections (transects)............................................................5-7 Figure 5-6. Floodplain wetted perimeter versus elevation at floodplain vegetation cross-section 51 (transect 51). Arrows indicate mean elevations for floodplain vegetation classes at the site. .....................................................5-9 Figure 5-7. Elevations of hydric and nonhydric (upland and non-hydric soils with flooding indicators) soils at the eight floodplain vegetation cross-sections.5-10 Figure 5-8. Percent-of-flow reductions that result in a 15% reduction in the number of days flows at the USGS Lithia gage are achieved....................5-11 Figure 5-9. Predicted habitat gain/loss for adult large mouthbass based on the flow record from 1970 to 1999 and flow reductions of 10, 20, 30, and 40 percent.......................................................................................................5-13 Figure 5-10. Percent dominance of instream habitats based on linear extent of habitats along eight cross-sections in the Alafia River corridor..................5-14 Figure 5-11. Mean elevations of instream habitat at eight cross-section sites on the Alafia River. .........................................................................................5-14 x
Figure 5-12. Habitat Gain/Loss for adult largemouth bass associated with modeled flow reductions of 5-40% in the Lithia Springs Major run. Similar plots for other largemouth bass life history stages and other species are included in Appendix PHABSIM.................................................................5-18 Figure 5-13. Habitat Gain/Loss for adult largemouth bass associated with modeled flow reductions of 10-40% in Buckhorn Creek, based on Buckhorn Spring flows, downstream of Buckhorn Springs Main. Similar plots for other largemouth bass life history stages and other species are included in Appendix PHABSIM...................................................................................5-22 Figure 5-14. Habitat Gain/Loss for adult largemouth bass associated with modeled flow reductions of 10-40% in Buckhorn Creek, based on Buckhorn Creek flows, downstream of Buckhorn Springs Main. Similar plots for other largemouth bass life history stages and other species are included in Appendix PHABSIM...................................................................................5-24 xi
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: Figure 2-33. Phosphorus concentrati
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 and 38: Figure 2-4. May and September 2001
Page 39 and 40: head differences indicating breache
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 57 and 58: Period of Record Median Daily Flows
Page 59 and 60: occurred during the spring were sim
Page 61 and 62:
Conversely, since most of the Unite
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extending from 1940 to 1969 can be
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Period of Record Median Daily Flows
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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
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Alafia River at Lithia, FL Nitrate/
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2.4.2 Potassium and Trend Analysis
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Alafia River at Lithia, FL 14 Potas
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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
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flow regimes and these life history
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subsidy of water and nutrients that
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Chapter 4 Technical Approach for Es
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4.2.1 HEC-RAS Cross-Sections Cross
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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
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4.9.1.2 Recreational Use Assessment
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Chapter 5 Results and Recommended M
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greater than 25 cfs would inundate
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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
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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
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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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