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

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Table 2-1. Major sub-basins within the Alafia River watershed, associated areas and minor USGS sub-basins included in the major sub-basins. Major Sub-basin Total Acres Square Miles Minor Sub-basins Alafia Mainbranch 19309 30 ALAFIA MAINBRANCH LITTLE FISHHAWK CREEK RICE CREEK North Prong Alafia 86202 135 AIRPORT BRANCH BIRD BRANCH ENGLISH CREEK HAMILTON BRANCH HOWELL BRANCH LAKE DRAIN MINED AREA NORTHPRONG ABOVEGAGE AL POLEY CREEK SLOMAN BRANCH THIRTYMILE CREEK South Prong Alafia 88303 138 SOUTHPRONG ABOVEGAGE AL CHITC BRANCH GULLY BRANCH HALLS BRANCH HOOKERS PRAIRIE HURRAH CREEK LAKE BRANCH LEWIS BRANCH LITHIA_SPRONG_BLOGAGE MCMULLEN BRANCH MINED AREA MIZELLE CREEK OWENS BRANCH SOUTHPRONG ABOVEGAGE AL UNNAMED STREAM WEST BRANCH Bell Creek 13490 21 BELL CREEK BELL CREEK RESERVOIR BOGGY CREEK PELLEHAM BRANCH Buckhorn Creek 4826 8 BUCKHORN CREEK Fish Hawk Creek 14288 22 DOE BRANCH FISHHAWK CREEK FLAT CREEK MINED AREA Lithia 16281 25 LITHIA_ABOVEGAGE_ALA LITHIA_NPRONG_BLOGAGE MC DONALD BRANCH MCCULLOUGH BRANCH Turkey Creek 27287 43 MEDARD PARK RUN TURKEY CREEK TOTALS 269986 422 2-17
Before discussing individual sub-basin land use changes, it is informative to discuss the entire watershed of the Alafia River to get an appreciation of the major land uses/covers and the changes that have occurred during the nearly 30 years for which land use maps are available. Land use / cover maps for 1972 and 1999 for the entire Alafia River watershed are shown in Figure 2-9. Note that for mapping purposes, uplands were divided into two subgroups (rangeland and upland forests) and wetlands were separated into wetland forests and nonforested wetland subgroupings. Subgroupings were not maintained for tabular analyses and plotting of land use changes (Table 2-2, Figure 2-10). The total area of the Alafia River watershed is 269,986 acres or 422 square miles. From inspection of acreage changes as shown in either Table 2-2 or Figure 2-10, several land use/cover changes are readily apparent. There have been noticeable increases in both urban land area and mined area. As of 1999, almost 18% of the watershed area was urbanized. In 1972, urban land was 11% of the watershed. Even more striking, however, is the increase in mined lands. In 1972, approximately 11% of the watershed had been mined; by 1999 the amount of mined land encompassed approximately 36% of the watershed, equivalent to 105 square miles. While the area of mined and urbanized lands increased markedly, upland and agricultural land area decreased correspondingly. Total decreases in agricultural land and uplands amounted to approximately 54 and 87 square miles, respectively. Decreases in these two land use categories of 141 square miles were almost offset by the 133 square mile increase in urbanized and mined lands. Of the eight large sub-basins delineated for this report, only four lie upstream of the Alafia at Lithia gage. These are the North Prong, South Prong, Turkey Creek, and Lithia Springs sub-basins. Based on land use maps prepared for this report the total combined area of these four sub-basins is 218,073 acres or approximately 341 square miles. The USGS reports that the area above the Lithia gage is 335 square miles. Most of the mined land in the Alafia River watershed can be found in these four sub-basins (96%) and most of this is in either the North (32%) or South Prongs (57%). 2-18
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: 2.2 Land Use Changes in the Alafia
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 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
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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
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
Page 233:
Comparison of July Rainfall Totals
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