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

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8) Peer reviewers mentioned that having a schematic or aerially-based map showing PHABSIM transects and some general features would be informative to the reader, and they recommend including this type of figure in future reports. There also note that a description of the ratio of habitat types (riffle / run / pool) that are represented in the study sites by the three PHABSIM transects should be include in future reports. They also note that future reports should include a discussion of the ratio of habitat types in the study sites relative to the ratio of these habitat types in the entire reach of the river that the study sites represent. Staff understands the points made and has tried to select representative site for location the PHABSIM transects in the past. As always access granted by private land owners has played a role in site selection. The comments of the panel are appreciated and their suggestions for schematics and better description of the transect selection process will be incorporated into future MFLs reports. 9-10
Habitat Criteria and Characterization Methods Used to Develop MFLs Fish Passage 9) The peer review panel has questioned the adequacy of the fish passage depth for maintaining negative effects associated with low flows in warm water ecosystems (i.e., temperature, dissolved oxygen, and algal blooms). The peer review staff further seeks assurance that the hydrologic control points were systematically identified. On page 4-18, in the last paragraph, it is stated, “The flows were determined by adding the 0.6-ft depth fish-passage criterion to the elevation of the lowest spot in the channel and determining the flow necessary to achieve the resultant elevations.” It would be helpful to the reader if the determination of “…the lowest spot in the channel…” was more thoroughly described in the report. As noted in item (5) above the District has committed to the study and confirmation of its low flow threshold criteria (e.g., fish passage water depth). The dissolved oxygen and water temperature study currently being conducted by staff seeks to validate or improve the fish passage estimate with regard to the implied protection of oxygenation and thermal characteristics associated with flow across river shoals. With respect to the panel's concerns regarding description of the "lowest spot in the channel", staff notes that the lowest spot in the channel refers to the lowest surveyed elevation in the respective shoal cross-section. Staff has revised the MFLs report to clarify this description. 9-11
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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
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Table 2-4. Results of Kendall's tau
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2.4.4 Benchmark Periods Climate-bas
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Oscillation were examined. On a sea
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Water Chemistry 2.4.6 Water Quality
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Braden River near Lorraine, FL 0.6
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Peace River at Arcadia, FL 10 Potas
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Table 2-8. Summary statistics for B
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3.2 Resources and Area of Concern T
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habitat, the greater area of stream
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levels such as fish have been shown
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Figure 3-1. Example of low flow in
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USGS Braden River near Lorraine gag
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instream cross-sections were sample
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Figure 4-2. Upstream vegetation cro
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supports water surface profile calc
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The HEC-RAS model was run using 21
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Adult Spotted Sunfish Adults - Brad
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species of interest. For example cu
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4.4 Seasonal Flow and Development o
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Wetted Perimeter - Sta. 44.9 25 20
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factors, the most conservative of w
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Chapter 5 Results and Recommended M
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Wetted Perimeter Requirements Flow
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40 35 30 25 20 15 10 5 0 May June M
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Floodplain profiles and vegetation
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mean elevation of the Oak/popash ve
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Table 5-3. Mean (±SD) flows at the
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Elevaton (NGVD) 27.0 22.0 17.0 12.0
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Table 5-7. Median elevations, in fe
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80 70 60 Flow reduction (%) 50 40 3
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Table 5-8. Recommended percent flow
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100 90 80 % DOMINANCE 70 60 50 40 3
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Table 5-9. Mean elevation of instre
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The second standard was developed t
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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
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Page 139 and 140: have now been developed and adopted
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Page 143 and 144: prevent negative effects associated
Page 145 and 146: methods, such as LiDAR, to improve
Page 147 and 148: habitat reduction criterion and the
Page 149 and 150: Summary, Special Publication SJ2002
Page 151 and 152: Errata / comments by page number in
Page 153 and 154: 4-20 Section 4.7.1, 1 st paragraph,
Page 155 and 156: Chapter 9 Appendix B - Staff Respon
Page 157 and 158: 2) The panel notes that the period
Page 159 and 160: 4) One aspect of Chapter 2 should b
Page 161 and 162: Preventing Significant Harm - 15% C
Page 163: they aren't getting enough particul
Page 167 and 168: Compliance Standards and Proposed M
Page 169 and 170: Glossary of Terms 13) When an inter
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