The Determination of Minimum Flows for Sulphur Springs, Tampa
The Determination of Minimum Flows for Sulphur Springs, Tampa The Determination of Minimum Flows for Sulphur Springs, Tampa
DRAFT The effects of tide stage on salinity could be used to minimize salinity incursions while allowing for diversions of water from the spring pool. For example, flows could be reduced from 18 cfs to 10 cfs during times of low river levels (< -0.5 feet) without causing the incursions into the spring run. In this regard, a plan to manage flow from the spring that accounted for tide stage in the river could make additional spring water available for use without causing significant salinity incursions. It is not known how quickly the hydraulic relationships at the weir would respond to such changes in flows, and the most effective manipulation of flows based on water levels would require further field testing. 5.2.5 Relations of springflow to water levels in the upper spring run In addition to their effect on salinity, changes in flows could affect the water levels in the spring run and the depth and inundation characteristics of aquatic habitats. As previously discussed, water levels in the run largely track water levels in the river at high tide stages. As a result, the water levels in the run that occur at medium or high tides do not show a strong relationship with flow. Daily mean and maximum water levels are plotted versus same-day springflow in Figures 5.9 a and b. There is no apparent response of maximum daily stage with flow, and a simple linear regression between these variables was not significant (p
DRAFT Maximum Daily Stage Minimum Daily Stage 5.0 4.5 0.5 Water Level, ft (NGVD 1929) 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 Water Level, ft (NGVD 1929) 0.0 0.0 0 5 10 15 20 25 30 35 40 Sulphur Spring Flow (cfs) Mean Daily Stage -0.5 0 5 10 15 20 25 30 35 40 Sulphur Spring Flow (cfs) 3.0 Water Level, ft (NGVD 1929) 2.5 2.0 1.5 1.0 0.5 0.0 -0.5 Plot Conditions : Hillsborough Reservoir
- Page 107 and 108: 8 24 25 29 DRAFT Figure 3-20, 3-21
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- Page 111 and 112: DRAFT of the river between the dam
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- Page 115 and 116: DRAFT The HBMP project (PBSJ 2003)
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- Page 119 and 120: DRAFT as manatees seek fresh water
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- Page 129 and 130: DRAFT Figure 3-33 2001 2002 2003 20
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DRAFT<br />
Maximum Daily Stage<br />
<strong>Minimum</strong> Daily Stage<br />
5.0<br />
4.5<br />
0.5<br />
Water Level, ft (NGVD 1929)<br />
4.0<br />
3.5<br />
3.0<br />
2.5<br />
2.0<br />
1.5<br />
1.0<br />
0.5<br />
Water Level, ft (NGVD 1929)<br />
0.0<br />
0.0<br />
0 5 10 15 20 25 30 35 40<br />
<strong>Sulphur</strong> Spring Flow (cfs)<br />
Mean Daily Stage<br />
-0.5<br />
0 5 10 15 20 25 30 35 40<br />
<strong>Sulphur</strong> Spring Flow (cfs)<br />
3.0<br />
Water Level, ft (NGVD 1929)<br />
2.5<br />
2.0<br />
1.5<br />
1.0<br />
0.5<br />
0.0<br />
-0.5<br />
Plot Conditions :<br />
Hillsborough Reservoir
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