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

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Muck Soils – Type of organic soil consisting mainly of highly decomposed remains of plant material and other organisms. National Wetlands Inventory (NWI) – A research program of the U.S. Fish and Wildlife Service aimed at producing and providing information on the characteristics, extent and status of U.S. wetlands, deep water habitats and other wildlife habitats. Natural Flow – A flow condition where variation in discharge (or river stage) exists in the absence of any human alteration or would occur under completely unregulated conditions; that is not subjected to reservoirs, diversions, or other human works, over a specific time period. Non-hydric Soil – A soil that has developed under predominantly aerobic soil conditions. Percent Dominance – A quantitative descriptor of habitat, expressed as a percent, of the relative size or cover of instream habitats in a cross-sectional transect. Percent-of-Flow Reductions – The percent-of-flow approach is a means of regulation in which a percent of the previous days natural flow is allocated as available for use. Period of Record – The length of time for which data for a variable has been collected on a regular and continuous basis. Physical Habitat Simulation Model (PHABSIM) – 1. A specific model designed to calculate an index to the amount of microhabitat available for different faunal life stages at different flow levels. PHABSIM has two major analytical components: stream hydraulics and life stage-specific habitat requirements. 2. This extensive set of programs is designed to predict the micro-habitat (depth, velocities, and channel indices) conditions in rivers as a function of streamflow, and the relative suitability of those conditions to aquatic life. Pool – Part of a stream with reduced velocity, often with water deeper than the surrounding areas, which is usable by fish for resting and cover. Prescribed Flow Reduction – A set of minimum flow rules tailored to seasonal blocks that summarize the extent of allowable flow reductions based on ecological criteria and maximum extent of loss allowed before significant harm takes place. Recharge – Process by which water is added to the zone of saturation as recharge of an aquifer. 7-5
Riffle – A relatively shallow reach of stream in which the water flows swiftly and the water surface is broken into waves by obstructions that are completely or partially submersed. In this report riffle is synonymous with the term shoal. Riparian Vegetation – Vegetation that is dependent upon an excess of moisture during a portion of the growing season on a site that is perceptively moister than the surrounding areas. Riparian Zone – The transitional zone or area between a body of water and the adjacent upland identified by soil characteristics and distinctive vegetation that requires an excess of water. It includes wetlands and those portions of floodplains that support riparian vegetation. Run – A portion of a stream with low surface turbulence that approximates uniform flow, and in which the slope of the water surface is roughly parallel to the overall gradient of the stream reach. Seasonal Blocks – Any one of three time periods where flow conditions among Southwest Florida rivers or streams exhibit similar frequency, duration and magnitude in flow patterns that typically are linked to prevailing annual precipitation patterns. Currently differentiated into low (Block 1), medium (Block 2) and high (Block 3) flows. Short-Term Compliance Standard – Represents a block-specific flow prescription that can be utilized for evaluating minimum flows compliance on a short-term basis, for instance, based on measured daily flows. Short-term compliance standards are typically defined as a percent of the previous days natural flow. Snags – Dead or decaying woody debris material found lying along stream banks or in the channel and serve as structural habitats for instream biota. Stage – The distance of the water surface in a river above a known datum. Substrate – The material on the bottom of the stream channel, such as rock, sand, mud or vegetation. Thalweg – A longitudinal profile of the lowest elevations of a sequential series of cross-sections. Transect – A line on the ground along which observations are made at some interval. Tributary – A stream that feeds, joins or flows into a larger stream (at any point along its course or into a lake). 7-6
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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
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 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: Instream Habitats - A specific type
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
Page 141 and 142: An example of the primary output fr
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 and 164: they aren't getting enough particul
Page 165 and 166: Habitat Criteria and Characterizati
Page 167 and 168: Compliance Standards and Proposed M
Page 169 and 170: Glossary of Terms 13) When an inter
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