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

More documents

Recommendations

Info

Analytical Tools Used to Develop MFLs PHABSIM 7) The peer review report notes that bluegill and largemouth bass are generalist and not especially sensitive to change in hydrologic regime and may, therefore, be inappropriate species for use in the PHABSIM analyses used to develop MFLs. The review panel suggests that the District generate habitat suitability curves (for use in the PHABSIM system) for species that are more sensitive to changes in flow and also suggests that it may be appropriate to incorporate species or community types tracked by the Florida Natural Areas Inventory (e.g., peninsular floater, ironcolor shiner, Chapman's sedge. bald eagle, and hydric hammock) into the modeling effort. Staff agrees that development of additional habitat suitability curves, or refinement of existing curves would be a means of improving the PHABSIM analysis used in the MFLs process. The District has contracted Dr. James Gore of the University of South Florida to complete this work. To date Dr. Gore has developed and used Florida-specific data to refine about half of the curves currently used for District MFLs analyses,. Staff continues to work with Dr. Gore to identify the most practical and useful candidates for development of new habitat suitability indeces or curves. Staff notes that it may be possible to incorporate species or community types tracked through the Florida Natural Areas Inventory program into the District's PHABSIM modeling efforts. With respect to the specific taxa and community identified by the panel, staff consulted with Dr. James Gore on the potential for developing data sets that could be used for PHABSIM analyses supporting MFLs development. Comments provided by Dr. Gore are summarized below. (1) Ironcolor shiner (Notropis chalybaeus) - Indices or curves for this small fish species could be developed if it is possible to identify this shiner in the field during electrofishing. Field identification of minnow species is typically difficult, however, and the ironcolor shiner is a relatively nondescript minnow. Use of a recently developed habitat suitability curves for "forage fish" a collection of small fish species, may be an appropriate substitute for species-specific curves for small fish taxa and will be used in future river MFLs studies. (2) Peninsular floater (Utterbackia peninsularis) – Development of habitat suitability curves for this mussel species would be problematic at best since mussels do not "respond" to changing flows in the same way that fish and mobile invertebrates do - their only choice is to either starve to death slowly because 9-8
they aren't getting enough particulates delivered to them or they dry up and die Use of PHABSIM analyses is not appropriate for relatively stationary species. This issue is discussed in greater detail in the published paper listed below, which proposes an alternative way to address mussels and instream flows. Basically, the recommended approach would be to map mussel beds in river segments and use the PHABSIM modeling system to examine changes in inundation depths and flow velocities with changes in river flows. This can be an arduous process but has been accomplished for a couple of streams in Tennessee and Alabama. Gore, J.A., J.B. Layzer, and J. Mead. 2001. Macroinvertebrate instream flow studies after 20 years: a role in stream and river restoration. Regulated Rivers 17: 527-542 (3) Chapman's sedge (Carex chapmanii), a wetland plant, is also stationary. Like the peninsular floater and most mussel species, individual plants cannot relocate in response to changing flows, although it likely that distribution of propagules is influenced by variations in flow. Existing stands of the sedge could be mapped and hydraulic models used to predict inundation of the stands under varying flow regimes. Information on preferred habitat variables (e.g., water depth and velocity) could be developed and used to predict potential habitat availability for the species. (4) Bald eagle (Haliaetus leucocephalus) - Field observations and photography from blinds could be used to pinpoint the "use" / capture points of fish, etc., for individual eagles and then water velocities, depths, and substrate conditions associated with the points could be used to create habitat suitability curves. This would probably be a difficult and potentially unreliable process as the species is not entirely water dependant. (5) Hydric hammock, a natural community of the river's floodplain. Hydraulic models could be used to predict inundation patterns for this floodplain community, but it seems unreasonable that PHABSIM could be utilized for evaluating changes in this habitat type. Current District methods for establishing MFLs include analysis of inundation patterns for this and other floodplain communities. As part of its adaptive management approach the District continues to develop new and refine existing habitat suitability curves. Consultants have already refined some of the initial curves used in MFL studies to be Florida specific. The newer curves are consistent with the earlier curves though they exhibit a higher level of detail. 9-9
Page 1 and 2:
Proposed Minimum Flows and Levels f
Page 3 and 4:
Table of Contents TABLE OF CONTENTS
Page 5 and 6:
5.5 PRESCRIBED FLOW REDUCTION FOR B
Page 7 and 8:
Figure 2-19. Potassium concentratio
Page 9 and 10:
Figure 5-13. Median daily flow at t
Page 11 and 12:
mean feature elevations are listed
Page 13 and 14:
For the high flow season of the yea
Page 15 and 16:
Acknowledgements The authors would
Page 17 and 18:
fluctuations in water flows or leve
Page 19 and 20:
Common to this list and the flow re
Page 21 and 22:
Fundamental to the approach used fo
Page 23 and 24:
300 250 Block 1 Block 3 Block 2 Flo
Page 25 and 26:
are outlined in Chapter 4. In Chapt
Page 27 and 28:
as the freshwater segment upstream
Page 29 and 30:
attributed to analytic precision di
Page 31 and 32:
Figure 2-4. 1999 land use/cover map
Page 33 and 34:
Table 2-2. Land use/cover and land
Page 35 and 36:
Figure 2-8. 1999 Land use/cover map
Page 37 and 38:
Figure 2-10. 1972 Land use/cover ma
Page 39 and 40:
Smith and Stopp (1978) note that "i
Page 41 and 42:
2.4.2.1 Multidecadal Periods of Hig
Page 43 and 44:
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
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 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
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
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: Preventing Significant Harm - 15% C
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
show all

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

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?