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

More documents

Recommendations

Info

Table 4-2. Beginning and ending dates for annual flow Blocks 1, 2, and 3 for the Alafia, Hillsborough, Myakka and Peace Rivers for non-leap years. Start Date (Julian day) End Date (Julian Day) Number of Days Block 1 April 20 (110) June 25 (176) 66 Block 2 October 27 (300) April 19 (109) 175 Block 3 June 26 (177) October 26 (299) 123 4.5 Low Flow Threshold for the Alafia As part of the protection of the flow regime, minimum flows and levels are intended to protect aquatic resources associated with low flows. To accomplish this goal, it is necessary to develop a low flow threshold, which identifies flows that are to be protected in their entirety (i.e., flows that are not available for consumptive-use). To determine this threshold, two low flow standards are developed. One is based on the lowest wetted perimeter inflection point; the other is based on maintaining fish passage along the river corridor. The low flow threshold is established at the higher of the two flow standards. Although flows less than the low flow threshold may be expected to occur throughout the year, they are most likely to occur during Block 1 (Figure 4-10). 4.5.1 Wetted Perimeter Standard Output from multiple runs of the HEC-RAS channel model were used to generate a wetted perimeter versus flow plot for each HEC-RAS cross-section of the Alafia River corridor (see Figure 4-11 as an example, Appendix WP). Plots were visually examined for inflection points, which identify flow ranges that are associated with relatively large changes in wetted perimeter. The Lowest Wetted Perimeter Inflection Point (LWPIP) for flows up to 200 cfs was identified for each cross-section. Inflection points for flows higher than 200 cfs were disregarded since the goal was to identify the LWPIP for flows contained within the stream channel. Many cross-section plots displayed no apparent inflection points between the lowest modeled flow and 200 cfs. These cross-sections were located in areas where the water surface elevation may exceed the lowest wetted perimeter inflection point even during low flow periods. For these cross-sections, the LWPIP was established at the lowest modeled flow. Flows associated with the LWPIP at each cross-section were converted to flows at the USGS Lithia Gage using empirical relationships from HEC-RAS channel model output. Flow at the USGS Lithia gage that was sufficient to inundate the LWPIP at all sampled cross-sections was used to define the wetted perimeter low flow standard for the Alafia River corridor. 4-20
Wetted Perimeter - USGS 84.5 - SWFWMD Shoal 9 4000 3500 3000 Flow (cfs) 2500 2000 1500 1000 500 0 0 20 40 60 80 100 120 140 160 180 Wetted Perimeter (feet) Wetted Perimeter - USGS 84.5 - SWFWMD Shoal 9 Flows less than 200 cfs 200 Flow (cfs) 150 100 50 0 15 cfs 0 50 100 150 200 Wetted Perimeter (feet) Figure 4-11. Discharge at HEC-RAS transect number 84.5 (Shoal 9). Wetted perimeter values for the entire range of modeled flows are shown in the upper plot; values for modeled flows up to 200 cfs are shown in the lower plot. 4-21
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: Period of Record Median Daily Flows
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 and 150: For the USGS Lithia gage site, the
Page 151 and 152: 40 35 30 25 20 15 10 T20 T21 T27 T3
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 ...

Create successful ePaper yourself

Delete template?

Save as template?