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 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 35 35 30 30 Temperature (oC) 25 20 Sulphur Springs Temperature 25 20 15 15 10 SS_TempAllcodes2.grf 10 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 Year Figure 3-25. Seasonal temperature variations in Sulphur Springs pool taken from monthly data recorded by the City of Tampa Average daily water temperatures at the continuous recorders in the spring pool and upper spring run are plotted in Figure 3-26 along with withdrawals from the spring pool. Similar to the monthly data, daily temperatures in the pool display a very minor seasonal variation, generally fluctuating within one degree of a mean temperature of 25 o C. When there are no withdrawals from the spring, water temperature in the run closely tracked the temperature of the pool. When withdrawals occurred, temperatures in the run varied from the pool temperature, being colder in the winter months and warmer in the summer months. These deviations represent the movement of water from the Hillsborough River into the run during withdrawals. Withdrawals during October or April do not cause such temperature changes in the run, as the river and spring are near the same temperature during these months. A similar relationship is seen at the mouth of the spring (Figure 3-27). Like the results for salinity (Section 3.4), these data indicate the thermal characteristics of the upper and lower run are very similar to the spring pool in the absence of withdrawals. However, withdrawals can affect temperature in the run depending on the magnitude of the withdrawal and water temperatures in the river at the time of the withdrawal. 3 - 54
1999 2000 2001 2002 DRAFT 35 TmpSS_Run_Pump.grf Temperature in Sulphur Springs Pool and Run 35 30 Run Pool 30 Temperature ( o C) 25 20 25 20 15 Daily Pumpage (cfs) 40 30 20 10 Pumpage (cfs) 10 1999 2000 2001 2002 Year 0 Figure 3-26. Comparison of water temperatures in Sulphur Springs pool and the data recorder in the upper spring run over withdrawals from the spring pool. 1999 2000 2001 2002 35 Temperature in Sulphur Springs Pool and Mouth 35 30 Pool Mouth 30 Temperature ( o C) 25 20 15 Daily Pumpage (cfs) 25 20 40 30 20 10 Pumpage (cfs) 10 TmpSS_Mth_Pump.grf 0 1999 2000 2001 2002 Year Figure 3-27. Comparison of water temperatures in Sulphur Springs pool and the data recorder at the mouth of the spring run over withdrawals from the spring pool. 3 - 55
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1999 2000 2001 2002<br />
DRAFT<br />
35<br />
TmpSS_Run_Pump.grf<br />
Temperature in <strong>Sulphur</strong> <strong>Springs</strong> Pool and Run<br />
35<br />
30<br />
Run<br />
Pool<br />
30<br />
Temperature ( o C)<br />
25<br />
20<br />
25<br />
20<br />
15<br />
Daily Pumpage (cfs)<br />
40<br />
30<br />
20<br />
10<br />
Pumpage (cfs)<br />
10<br />
1999 2000 2001 2002<br />
Year<br />
0<br />
Figure 3-26. Comparison <strong>of</strong> water temperatures in <strong>Sulphur</strong> <strong>Springs</strong><br />
pool and the data recorder in the upper spring run over withdrawals<br />
from the spring pool.<br />
1999 2000 2001 2002<br />
35<br />
Temperature in <strong>Sulphur</strong> <strong>Springs</strong> Pool and Mouth<br />
35<br />
30<br />
Pool<br />
Mouth<br />
30<br />
Temperature ( o C)<br />
25<br />
20<br />
15<br />
Daily Pumpage (cfs)<br />
25<br />
20<br />
40<br />
30<br />
20<br />
10<br />
Pumpage (cfs)<br />
10<br />
TmpSS_Mth_Pump.grf<br />
0<br />
1999 2000 2001 2002<br />
Year<br />
Figure 3-27. Comparison <strong>of</strong> water temperatures in <strong>Sulphur</strong> <strong>Springs</strong><br />
pool and the data recorder at the mouth <strong>of</strong> the spring run over<br />
withdrawals from the spring pool.<br />
3 - 55
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