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

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when compared with non-hydric, non-muck, and non-saturated conditions (Table 5-6). Hydric conditions were absent at Transects 9 through 12. Table 5-6. Median elevations in feet above NGVD of hydric and other soil characteristics along floodplain vegetation/soils transects on the Braden River. Transect Hydric Non-Hydric Muck Non-Muck Saturated Non- Saturated 1 25.3 (3) 26.3 (4) 25.7 (7) 25.7 (7) 2 24.4 (5) 25.8 (6) 25.6 (11) 25.6 (11) 3 25.6 (2) 26.0 (9) 24.8 (1) 26.2 (10) 24.8 (1) 26.0 (10) 4 19.2 (2) 20.9 (2) 19.2 (1) 20.9 (2) 19.2 (3) 5 24.5 (6) 24.5 (6) 24.5 (6) 6 20.7 (2) 21.7 (3) 20.7 (1) 21.7 (2) 20.1 (2) 21.7 (3) 7 21.2 (2) 21.2 (5) 21.2 (2) 8 18.0 (5) 17.4 (1) 18.0 (1) 17.4 (5) 17.7 (6) 9 20.0 (5) 20.0 (7) 20.0 (5) 10 15.5 (7) 15.5 (8) 15.5 (7) 11 14.0 (8) 14.0 (8) 14.0 (8) 12 9.1 (8) 9.1 (8) 9.1 (8) 13 6.1 (1) 10.3 (4) 6.9 (5) 7.8 (2) 6.9 (5) 14 3.1 (5) 11.1 (7) 3.8 (3) 10.1 (9) 2.5 (3) 10.1 (9) 15 3.6 (3) 10.2 (3) 3.6 (1) 3.7 (5) 3.4 (4) 12.4 (2) * Shaded cells indicate absence of soil type/condition. Numbers in parentheses are N. Hydric soils occurred in all vegetation classes except the pine/oak and oak mix classes (Table 5-7). The popash class was the single vegetation class in which all soils sampled were hydric, and 36 of 40 soil samples from the oak/popash class were hydric. Samples in the remaining classes were primarily non-hydric, although 15 of 53 soil samples from the hickory/oak class were hydric. Hydric soils occurred at lower elevations than non-hydric soils in all vegetation classes except the oak/cabbage palm class, where the soil elevations were the same; although only five of the 104 soil samples collected in this vegetation class were hydric. 5-14
Table 5-7. Median elevations, in feet above NGVD, and relative elevations (height in feet above the river channel bottom) of hydric and non-hydric soils in vegetation classes occurring along the floodplain vegetation/soils transects on the Braden River. Vegetation Class Hydric Non-hydric N Relative Elevation (ft) Elevation (ft NGVD) N Relative Elevation (ft) Elevation (ft NGVD) Popash 16 5.0 2.8 Oak/popash 36 7.1 19.9 2 6.8 21.8 Hickory/oak 15 7.8 25.2 53 9.1 15.8 Oak/cabbage palm 5 9.4 18.0 99 9.4 24.5 Pine/oak 24 14.3 19.5 Oak mix 27 13.3 11.1 Combined 72 7.1 207 10.6 *Shaded cells indicate absence of soil type/condition Modeled flows at the Braden River near Lorraine gage needed to inundate the median elevations of floodplain vegetation classes and soils are listed in Table 5- 3. Although the popash vegetation class occurred too infrequently for estimation of flows necessary for their inundation, mean flows of 287 to 541 cfs were determined to be necessary for inundation of other wetland and transition vegetation classes. Muck and hydric soils require mean flows of 357 and 377 cfs, respectively, for inundation. 5.4.3 Percent-of-Flow Reductions for Floodplain Features, Vegetation Classes and Soils Changes in flow at the Braden River near Lorraine gage during Block 3 that are expected to result in no more than a 15% reduction in the number of days of inundation of the median elevation of selected floodplain attributes were evaluated for two benchmark periods, 1988 through 1994 and 1995 through 2005 (Table 5-3). Percent-of-flow reductions associated with inundation of geomorphological features (river banks and wetted perimeter inflection points) ranged from 2 to 20%. Identified flow reductions for elevations associated with wetland soils were less variable, ranging from 11 to 20%. Percent-of-flow reductions identified for inundation of median wetland or transitional vegetation classes ranged from 3 to 14%, and were lower for the period from 1988 through 1994. 5-15
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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
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Table 2-4. Results of Kendall's tau
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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
Page 73 and 74: supports water surface profile calc
Page 75 and 76: The HEC-RAS model was run using 21
Page 77 and 78: Adult Spotted Sunfish Adults - Brad
Page 79 and 80: species of interest. For example cu
Page 81 and 82: 4.4 Seasonal Flow and Development o
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 and 96: mean elevation of the Oak/popash ve
Page 97 and 98: Table 5-3. Mean (±SD) flows at the
Page 99: Elevaton (NGVD) 27.0 22.0 17.0 12.0
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
Page 135 and 136: with limited biological knowledge o
Page 137 and 138: the other factors listed above or w
Page 139 and 140: have now been developed and adopted
Page 141 and 142: An example of the primary output fr
Page 143 and 144: prevent negative effects associated
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Page 149 and 150: 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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