Alafia River Minimum Flows and Levels - Southwest Florida Water ...

More documents

Recommendations

Info

973 to 3091 ft. Local (cross-section site) flows needed to overflow the river's banks ranged from 566 to 2445 cfs (see Appendix RH for channel bank and other floodplain feature elevations and associated flows). Mean flow at the Lithia gage corresponding to the flow necessary for exceeding the elevation of the lowest bank on either side of the river averaged 1160 cfs; flows at the gage that would be sufficient for the river to overflow both banks averaged 2269 cfs (Table 5-1). Elevation (feet) 40 35 30 25 20 15 10 5 0 -1600 -1400 -1200 -1000 -800 -600 -400 -200 0 200 400 Cumulative Length (feet) Figure 5-4. Elevation profile for floodplain vegetation cross-section (transect) 49. Distances (cumulative length) are shown centered on the middle of the river channel. Six vegetation classes were identified at the floodplain vegetation cross-section sites and their mean elevations at each transect are indicated in Figure 5-5. Detailed descriptions of the vegetation classes, which include Cypress/Palm Swamp, Cypress Swamp, Hardwood Swamp, Wet Hardwood Hammock, Dry Palm Bank and Dry Hardwood Hammock, are provided in PBS&J (2004). Mean elevations of vegetation classes were not related to location along the river channel and there were no apparent differences between "upstream" or "downstream" vegetation classes in the study. Consequently, elevation data were normalized to channel elevations at each transect for further comparisons. Normalized mean elevations for Cypress Palm Swamps, Cypress Swamps and Hardwood Swamps did not differ, but the swamp classes were found at lower elevations than the Wet Hardwood Hammocks (Wilcoxon Signed Rank, S=-13, p
40 35 30 25 20 15 10 T20 T21 T27 T32 T49 T51 T60 T64 Downstream Upstream Cypress/ Palm Sw amp Cypress Sw amp Hardw ood Sw amp Wet Hardw ood Hammock Dry Palm Bank Dry Hardw ood Hammock Figure 5-5. Mean elevations of six vegetation classes at eight Alafia River floodplain crosssections (transects). Inundation of the highest floodplain vegetation class would require local (crosssection site) flows of 2878 cfs or more (flows for only two cross-sections could be calculated, elevations for other sites were higher than could be modeled with the HEC-RES floodplain model; see Appendix RH). Corresponding flows of 3334 cfs or higher at the USGS Lithia gage would be required to inundate the highest floodplain vegetation classes (Table 5-1). Inundation of the mean elevation associated with the floodplain swamp classes (Cypress/Palm Swamp, Cypress Swamp, Hardwood Swamp) would occur when local flows range from 412 to 1478 cfs. Corresponding flows at the USGS Lithia gage would range from 529 to 1843 cfs, with a mean of 981 cfs (Table 5-1). To inundate the highest swamp class at each cross-section, flows ranging from 731 to 3233 (mean = 1480 cfs) would be required at the Lithia gage (Table 5-1). Floodplain wetted perimeter plots (patterned after the wetted perimeter plots used for identification of the Lowest Wetted Perimeter Inflection Point) were developed for each floodplain vegetation cross-section (see Appendix RH). The plots were developed to show the linear extent of inundated floodplain (wetted perimeter) associated with measured floodplain elevations, including the mean elevations of the floodplain vegetation classes. For example, Figure 5-6 shows a floodplain wetted perimeter plot for floodplain vegetation cross-section (transect) 51. Based on the plot, an average of 350 linear feet of floodplain would be inundated when the river is staged at the mean elevation of the Wet Hardwood Hammock vegetation class. Flows necessary to inundate the first major slope change at each transect were evaluated using the HEC-RAS model. Local flows 5-7
Page 1 and 2:
Alafia River Minimum Flows and Leve
Page 3 and 4:
Table of Contents Table of Contents
Page 5 and 6:
4.3.1 HEC-RAS Modeling ............
Page 7 and 8:
Table of Figures Figure 1-1. Buildi
Page 9 and 10:
Figure 2-33. Phosphorus concentrati
Page 11 and 12:
Figure 5-12. Habitat Gain/Loss for
Page 13 and 14:
Table 5-2. Mean elevation, local (c
Page 15 and 16:
flow, with the exception that withd
Page 17 and 18:
Acknowledgement The authors would l
Page 19 and 20:
9) Water quality; and 10) Navigatio
Page 21 and 22:
Water Management District typically
Page 23 and 24:
Peace River at Zolfo Springs, FL. s
Page 25 and 26:
Period of Record Median Daily Flows
Page 27 and 28:
to enhance understanding of histori
Page 29 and 30:
River watershed, to the east by the
Page 31 and 32:
an adjacent area locally known as t
Page 33 and 34:
Water in the surficial aquifer is r
Page 35 and 36:
The Upper Floridan aquifer (UFA) sy
Page 37 and 38:
Figure 2-4. May and September 2001
Page 39 and 40:
head differences indicating breache
Page 41 and 42:
data (multiple regression) analyses
Page 43 and 44:
2.2 Land Use Changes in the Alafia
Page 45 and 46:
Before discussing individual sub-ba
Page 47 and 48:
Table 2-2. Land use and land cover
Page 49 and 50:
Table 2-3. Land use and land cover
Page 51 and 52:
Figure 2-13. 1972 and 1999 Land use
Page 53 and 54:
2.2.4 Lithia Springs Sub-Basin The
Page 55 and 56:
2.3 Hydrology The assessment of min
Page 57 and 58:
Page 59 and 60:
occurred during the spring were sim
Page 61 and 62:
Conversely, since most of the Unite
Page 63 and 64:
extending from 1940 to 1969 can be
Page 65 and 66:
Page 67 and 68:
third highest flow occurred early i
Page 69 and 70:
Flow (cfs) Alafia River at Lithia,
Page 71 and 72:
100 North Prong Alafia River at Key
Page 73 and 74:
Flow (cfs) South Prong Alafia River
Page 75 and 76:
Alafia River at Lithia - Water Qual
Page 77 and 78:
South Prong Watershed Above USGS Ga
Page 79 and 80:
Comparisons of land use changes and
Page 81 and 82:
Comparison of Median Daily Flows fo
Page 83 and 84:
Comparisons of Annual 25% Exceedanc
Page 85 and 86:
Figure 2-25. Lithia Springs Major b
Page 87 and 88:
2.3.4.3.2 Discharge from Lithia Spr
Page 89 and 90:
Relationship Between Lithia Springs
Page 91 and 92:
Buckhorn Spring Main Discharge (Wit
Page 93 and 94:
versus flow. The third plot typical
Page 95 and 96:
Alafia River at Lithia, FL Phosphor
Page 97 and 98:
While elevated phosphorus concentra
Page 99 and 100: Peace River at Arcadia, FL 20 Phosp
Page 101 and 102: Alafia River at Lithia, FL Nitrate/
Page 103 and 104: 2.4.2 Potassium and Trend Analysis
Page 105 and 106: Alafia River at Lithia, FL 14 Potas
Page 107 and 108: Table 2-10. Results of Kendall's ta
Page 109 and 110: Chapter 3 Ecological Resources of C
Page 111 and 112: 1) maintenance of minimum water dep
Page 113 and 114: flow regimes and these life history
Page 115 and 116: subsidy of water and nutrients that
Page 117 and 118: Chapter 4 Technical Approach for Es
Page 119 and 120: 4.2.1 HEC-RAS Cross-Sections Cross
Page 121 and 122: PHABSIM analysis required acquisiti
Page 123 and 124: Figure 4-5. Upstream vegetation cro
Page 125 and 126: level, whenever possible. Immature
Page 127 and 128: major parameter altered during the
Page 129 and 130: Alafia River - Cross Section 64 - W
Page 131 and 132: Delphi method lacks the rapid feedb
Page 133 and 134: TOTAL DAYS OF INUNDATION DURING THE
Page 135 and 136: Period of Record Median Daily Flows
Page 137 and 138: Wetted Perimeter - USGS 84.5 - SWFW
Page 139 and 140: Alafia River Station 91.5 Stage in
Page 141 and 142: section sites and corresponding flo
Page 143 and 144: 4.9.1.2 Recreational Use Assessment
Page 145 and 146: Chapter 5 Results and Recommended M
Page 147 and 148: greater than 25 cfs would inundate
Page 149: For the USGS Lithia gage site, the
Page 153 and 154: Wetted Perimeter (linear feet) 2000
Page 155 and 156: dominant vegetation zones, mucky so
Page 157 and 158: 5.5.1 Application of PHABSIM for Bl
Page 159 and 160: 5.5.3 Flow Relationships with Woody
Page 161 and 162: River begins on October 28 and ends
Page 163 and 164: Table 5-4. Maximum monthly percent-
Page 165 and 166: 5.6.3 Short-Term Compliance Standar
Page 167 and 168: Table 5-5. Maximum monthly percent-
Page 169 and 170: 5.8 Short-Term Compliance Standard
Page 171 and 172: Table 5-7. Proposed Minimum Flows f
Page 173 and 174: Biological Services Program Report
Page 175 and 176: Jones, G.W., and Upchurch, S.B., 19
Page 177 and 178: SDI Environmental Services, Inc. 20
Page 179 and 180: Upchurch, S.B. and J.R. Littlefield
Page 181 and 182: A Review of “Alafia River Minimum
Page 183 and 184: The draft report for setting MFLs f
Page 185 and 186: methodologies, analyses, and conclu
Page 187 and 188: The SWFWMD has employed a building
Page 189 and 190: MFLs for the Alafia and Myakka rive
Page 191 and 192: RALPH PLOTS AND ANALYSES Recent and
Page 193 and 194: then used to estimate percent of fl
Page 195 and 196: necessary. Such a framework should
Page 197 and 198: to use to meet the criteria of no s
Page 199 and 200: Shaw, D.T., C.N. Dahm, and S.W. Gol
Page 201 and 202:
The District has added to Chapter 4
Page 207 and 208:
Attachment A June 15 th , 2005 Mrs.
Page 209 and 210:
The Kelly (2004) report includes a
Page 211 and 212:
Figure 1. Box-and-whisker plots of
Page 213 and 214:
As shown in Table 1, a nonparametri
Page 215 and 216:
“augmentation” - be performed a
Page 217 and 218:
Estuary Program 'Restoring the Bala
Page 219 and 220:
APPENDIX D - District's response to
Page 221 and 222:
educed by no more than 8 percent on
Page 223 and 224:
sites with comparable temporal reco
Page 225 and 226:
gradually removed (this appears as
Page 227 and 228:
1) The DISTRICT acknowledges the ma
Page 229 and 230:
Mark Hammond, Director, Resource Ma
Page 231 and 232:
Table 1. Mann-Whitney Statistical A
Page 233:
Comparison of July Rainfall Totals
show all

Alafia River Minimum Flows and Levels - Southwest Florida Water ...

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

Delete template?

Save as template?