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

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Table 2-4. Land use and land cover (by percentage) in the North Prong sub-basin of the Alafia River watershed (90,115 acres) for three time periods, 1972, 1990 and 1999. Alafia - North Prong 1972 1990 1999 Urban 14.0 17.0 23.4 Citrus 6.6 4.1 3.9 Other Agriculture 26.6 21.1 14.8 Uplands 25.8 11.5 9.3 Wetlands 7.2 10.6 10.6 Mines 15.7 33.8 35.3 Water 4.0 2.0 2.7 Land Use/Land Cover - Alafia - North Prong Area (acres) 35000 30000 25000 20000 15000 10000 5000 0 Urban Citrus Other Agriculture Uplands Wetlands Mines Water 1972 1990 1999 Figure 2-14. Comparison of land use and land cover changes in the North Prong sub-basin of the Alafia River watershed. 2.2.3 Turkey Creek Sub-Basin The Turkey Creek sub-basin is approximately 43 square miles (27,287 acres) and is composed of the USGS sub-basins of Medard Park Run and Turkey Creek. The single greatest land use change in this sub-basin between 1972 and 1999 was an approximate 10% increase in the amount of urbanized land. Some mining has occurred in this sub-basin (19% mined in 1999), but most of this occurred pre-1972 (18%). Agricultural acreage has decreased in this sub-basin since 1972, with a net decrease amounting to 8% of the watershed area. The area of uplands has likewise decreased by approximately 2,272 acres (8% of the watershed) during this time. Land use maps and tables for this sub-basin are included in the appendix. 2-25
2.2.4 Lithia Springs Sub-Basin The Lithia Springs sub-basin includes both McDonald and McCullough Branches and covers approximately 19 square miles (16,281 acres). This sub-basin has become increasingly more residential, while uplands and agricultural acreage has declined. In 1972, approximately 13 percent of the basin was urbanized; by 1999 this had increased to 34 percent. During this same time, agricultural acreage declined considerably; in 1972, 47% percent of this basin was in agriculture, but by 1999 this had declined to 28%. Uplands decreased from 24% to 13% from 1972 to 1999. Land use maps and tables for this sub-basin are included in the appendix. 2.2.5 Fish Hawk Creek Sub-Basin The Fish Hawk Creek sub-basin covers approximately 22 square miles (14,288 acres) and includes Doe Branch, Flat Creek and Fish Hawk Creek. Of the eight sub-basins delineated for this report, only the Fish Hawk sub-basin showed a net increase in agricultural lands between 1972 and 1999. Citrus acreage declined from 540 acres in 1972 to 328 acres by 1999, but other agricultural uses increased from 3,332 acres to 4,972 acres. Most of this increase in agricultural lands occurred in the pastureland/cropland category. Mining has occurred in this sub-basin; 1,301 acres were mined between 1972 and 1999, adding to the 1,966 acres, which had already been mined. Although residential development has been occurring at an increased rate since 1999, only 2% of this sub-basin was urbanized in 1999. The predominant land use in 1999 was agriculture (37% which includes a small amount of citrus). Although considerable uplands were lost between 1972 and 1999, uplands was still the second most common land use in 1999 (26%). A total of 23% of this sub-basin was mined by 1999. Land use maps and tables for this sub-basin are included in the appendix. 2.2.6 Buckhorn Creek Sub-Basin The Buckhorn Creek sub-basin is the smallest sub-basin delineated for this report (4,826 acres). Since Buckhorn Springs is the subject of a specific MFL determination, it was deemed desirable to characterize this sub-basin's land use separately. The amount of land in residential use has increased substantially since 1972. In 1972, approximately 38% of its eight square miles had been urbanized. By 1999, the amount of urbanized land had increased to 75%. The percent of land in agriculture has decreased from a combined 30% (citrus and other) to 7%, and upland and wetlands have decreased from a combined 32% to 15%. Land use maps and tables for this sub-basin are included in the appendix. 2-26
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 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: Figure 2-13. 1972 and 1999 Land use
Page 55 and 56: 2.3 Hydrology The assessment of min
Page 59 and 60: occurred during the spring were sim
Page 61 and 62: Conversely, since most of the Unite
Page 63 and 64: extending from 1940 to 1969 can be
Page 67 and 68: 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
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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
Page 173 and 174:
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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