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

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Alafia River Minimum Flows and Levels; Freshwater Segment November 2005 Ecologic Evaluation Section Resource Conservation and Development Department Southwest Florida Water Management District Brooksville, Florida 34604-6899 Marty Kelly Adam Munson Jonathan Morales Doug Leeper The Southwest Florida Water Management District (District) does not discriminate upon the basis of any individual’s disability status. This non-discriminatory policy involves every aspect of the District’s functions, including one’s access to, participation, employment, or treatment in its programs or activities. Anyone requiring accommodation as provided for in the American with Disabilities Act should contact (352) 796-7211 or 1-800-423-1476, extension 4215; TDD ONLY 1- 800-231-6103; FAX (352) 754-6749. ii
Table of Contents Table of Contents..........................................................................................................iii Table of Figures ...........................................................................................................vii List of Tables................................................................................................................xii Executive Summary....................................................................................................xiv Acknowledgement .....................................................................................................xvii Chapter 1 Minimum Flows and Levels ..................................................................... 1-1 1.1 OVERVIEW ..................................................................................................1-1 1.2 HISTORICAL PERSPECTIVE............................................................................1-2 1.3 THE FLOW REGIME ......................................................................................1-2 1.4 ECOLOGIC INTEGRITY AND SIGNIFICANT HARM ...............................................1-4 1.5 SUMMARY OF THE SWFWMD APPROACH FOR DEVELOPING MINIMUM FLOWS .1-4 1.5.1 Elements of Minimum Flows ..............................................................1-4 1.5.2 A Building Block Approach.................................................................1-6 1.6 FLOWS AND LEVELS .....................................................................................1-8 1.7 CONTENT OF REMAINING CHAPTERS .............................................................1-9 Chapter 2 Basin Description with Emphasis on Land Use, Hydrology and Water Quality.............................................................................................................. 2-1 2.1 WATERSHED DESCRIPTION...........................................................................2-1 2.1.1 Geographic Location..........................................................................2-1 2.1.2 Climate...............................................................................................2-3 2.1.3 Physiography (excerpted from SWFWMD 2001) ...............................2-3 2.1.4 Hydrogeology.....................................................................................2-5 2.1.4.1 Surficial Aquifer ............................................................................2-5 2.1.4.2 Intermediate Aquifer System ........................................................2-6 2.1.4.3 Upper Floridan Aquifer System ....................................................2-7 2.1.4.4 Brandon Karst Terrain ..................................................................2-8 2.1.4.5 Groundwater Flow and Levels......................................................2-9 2.1.4.6 Springflow and Groundwater Relationship .................................2-13 2.2 LAND USE CHANGES IN THE ALAFIA RIVER WATERSHED ...............................2-16 2.2.1 South Prong Sub-Basin ...................................................................2-20 2.2.2 North Prong Sub-Basin ....................................................................2-22 2.2.3 Turkey Creek Sub-Basin..................................................................2-25 2.2.4 Lithia Springs Sub-Basin..................................................................2-26 2.2.5 Fish Hawk Creek Sub-Basin ............................................................2-26 2.2.6 Buckhorn Creek Sub-Basin..............................................................2-26 2.2.7 Bell Creek Sub-Basin.......................................................................2-27 2.2.8 Alafia Mainstem Sub-Basin..............................................................2-27 2.3 HYDROLOGY..............................................................................................2-28 iii
Page 1: Alafia River Minimum Flows and Leve
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 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
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2.3 Hydrology The assessment of min
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Period of Record Median Daily Flows
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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
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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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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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