Chapter 1 Minimum Flows and Levels - Southwest Florida Water ...

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Six forested vegetation classes were identified and are listed below with species that characterized the class. • Popash (popash swamp): obligate wetland species including popash, dahoon holly, and Carolina willow, and the facultative species, cabbage palm. • Oak/popash (wetland): laurel oak, a facultative wetland species, popash, and smaller components of willow and cabbage palm. • Hickory/oak (transition): nearly equal dominance of the facultative pignut hickory and laurel oak, with a substantial cabbage palm component. • Oak/cabbage palm (transition): almost exclusively laurel oak, with minor components of cabbage palm. • Pine/oak (transition): co-dominance by slash pine, a facultative wetland species, and laurel oak. • Oak mix (upland): predominantly laurel oak, but with a much larger number of species, including upland species such as myrtle oak (Q. myrtifolia), wild cherry (Prunus caroliniana), and live oak (Q. virginiana). Percent occurrence of vegetation classes along Transects are shown in Table 5- 4. Based on National Wetland Inventory data, upstream transects 1 – 6 and downstream Transect 15 had larger deciduous tree components when compared with evergreen species, in contrast with downstream transects 11 – 14, which had larger evergreen components. This is generally consistent with vegetation classes identified in the field: popash, hickory, and oak were larger components at upstream transects 1 – 8 and 14 – 15, while cabbage palm, pine, and other species (e.g., oak mix vegetation class) characterized transects 9 – 13. 5-10
Table 5-3. Mean (±SD) flows at the Braden River near Lorraine gage required for inundation of median elevation of wetland (muck and hydric) soils, vegetation classes and selected geomorphological features at 15 floodplain vegetation/soils transects. Percentof-flow reductions associated with up to a 15% reduction in the number of days of flow sufficient to inundate the mean feature elevations are listed for two benchmark periods, 1988 through 1994 and 1995 through 2005. Floodplain Feature Number of floodplain transects containing feature (N) Mean Flow (±SD) Required for Inundation (cfs) Median Elevation of Muck Soils 6 357 (199) Median Elevation of Hydric Soils 9 377 (216) Percent -of- Flow Reduction (1988 – 1994) Percent -of- Flow Reduction (1995 – 2005) 20 11 15 11 Median Elevation of Popash Vegetation Zone Median Elevation of Oak/Popash Vegetation Zone Median Elevation of Hickory/Oak Vegetation Zone Median Elevation of Oak/Cabbage Palm Vegetation Zone 14 NA * 7 287 (106) 5 445 (190) 4 541 (94) 4 14 8 13 3 11 Lowest Elevation to Inundate One 6 13 9 507 (71) Side of Floodplain Lowest Elevation to Inundate Both 2 10 1 625** Sides of Floodplain First major low inflection point on 20 14 13 112 (109) wetted perimeter First major high inflection point on 4 13 13 289 (165) wetted perimeter * NA = Flow required to inundate the median habitat elevation at each transect was lower than modeled flows. ** Flows required to inundate the feature at 14 of the transects were higher than the 1% exceedance flow. 5-11
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Proposed Minimum Flows and Levels f
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Table of Contents TABLE OF CONTENTS
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5.5 PRESCRIBED FLOW REDUCTION FOR B
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Figure 2-19. Potassium concentratio
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Figure 5-13. Median daily flow at t
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mean feature elevations are listed
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For the high flow season of the yea
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Acknowledgements The authors would
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fluctuations in water flows or leve
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Common to this list and the flow re
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Fundamental to the approach used fo
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300 250 Block 1 Block 3 Block 2 Flo
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are outlined in Chapter 4. In Chapt
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as the freshwater segment upstream
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attributed to analytic precision di
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Figure 2-4. 1999 land use/cover map
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Table 2-2. Land use/cover and land
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Figure 2-8. 1999 Land use/cover map
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Figure 2-10. 1972 Land use/cover ma
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Smith and Stopp (1978) note that "i
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2.4.2.1 Multidecadal Periods of Hig
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2.4.3.2 Step Trend in River Flows K
Page 45 and 46: Table 2-4. Results of Kendall's tau
Page 47 and 48: 2.4.4 Benchmark Periods Climate-bas
Page 49 and 50: Oscillation were examined. On a sea
Page 51 and 52: Water Chemistry 2.4.6 Water Quality
Page 53 and 54: Braden River near Lorraine, FL 0.6
Page 55 and 56: Peace River at Arcadia, FL 10 Potas
Page 57 and 58: Table 2-8. Summary statistics for B
Page 59 and 60: 3.2 Resources and Area of Concern T
Page 61 and 62: habitat, the greater area of stream
Page 63 and 64: levels such as fish have been shown
Page 65 and 66: Figure 3-1. Example of low flow in
Page 67 and 68: USGS Braden River near Lorraine gag
Page 69 and 70: instream cross-sections were sample
Page 71 and 72: Figure 4-2. Upstream vegetation cro
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Page 75 and 76: The HEC-RAS model was run using 21
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Page 79 and 80: species of interest. For example cu
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Page 83 and 84: Wetted Perimeter - Sta. 44.9 25 20
Page 85 and 86: factors, the most conservative of w
Page 87 and 88: Chapter 5 Results and Recommended M
Page 89 and 90: Wetted Perimeter Requirements Flow
Page 91 and 92: 40 35 30 25 20 15 10 5 0 May June M
Page 93 and 94: Floodplain profiles and vegetation
Page 95: mean elevation of the Oak/popash ve
Page 99 and 100: Elevaton (NGVD) 27.0 22.0 17.0 12.0
Page 101 and 102: Table 5-7. Median elevations, in fe
Page 103 and 104: 80 70 60 Flow reduction (%) 50 40 3
Page 105 and 106: Table 5-8. Recommended percent flow
Page 107 and 108: 100 90 80 % DOMINANCE 70 60 50 40 3
Page 109 and 110: Table 5-9. Mean elevation of instre
Page 111 and 112: The second standard was developed t
Page 113 and 114: Table 5-10. Proposed Minimum Flows
Page 115 and 116: Division Information and Technology
Page 117 and 118: Hupalo, R., C. Neubauer, L. Keenan,
Page 119 and 120: communities in the corridors of the
Page 121 and 122: Wharton, C.H., W.M. Kitchens, E.C.
Page 123 and 124: Confined Aquifer - A term used to d
Page 125 and 126: Instream Habitats - A specific type
Page 127 and 128: Riffle - A relatively shallow reach
Page 129 and 130: Chapter 8 Appendix A A Review of
Page 131 and 132: steps to reduce the uncertainty and
Page 133 and 134: 2007). In addition, the approach us
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Page 137 and 138: the other factors listed above or w
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Page 143 and 144: prevent negative effects associated
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habitat reduction criterion and the
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Summary, Special Publication SJ2002
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Errata / comments by page number in
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4-20 Section 4.7.1, 1 st paragraph,
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Chapter 9 Appendix B - Staff Respon
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2) The panel notes that the period
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4) One aspect of Chapter 2 should b
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Preventing Significant Harm - 15% C
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they aren't getting enough particul
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Habitat Criteria and Characterizati
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Compliance Standards and Proposed M
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Glossary of Terms 13) When an inter
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