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The Determination of Minimum Flows for Sulphur Springs, Tampa

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DRAFT<br />

Median and minimum water temperatures calculated at four continuous recorders in the<br />

lower river operated by USGS are plotted in Figures 3-30 A and B <strong>for</strong> 2002. <strong>The</strong><br />

recorder at I-275 is 100 meters downstream from <strong>Sulphur</strong> <strong>Springs</strong>, while the recorder at<br />

Hanna's Whirl is 1.7 km upstream <strong>of</strong> the spring. Again, median and minimum water<br />

temperatures are warmer near the spring at the I-275 recorder during January and<br />

1 2 3 4 5 6 7 8 9 10 11 12<br />

35<br />

35<br />

<strong>Minimum</strong> Water Temperature 2002<br />

Water Column Temperature (oC)<br />

30<br />

25<br />

20<br />

15<br />

Rowlett<br />

Hanna<br />

I-275<br />

30<br />

25<br />

20<br />

15<br />

Platt<br />

10<br />

MthlyMinTemp_USGS.grf<br />

10<br />

1 2 3 4 5 6 7 8 9 10 11 12<br />

Month<br />

1 2 3 4 5 6 7 8 9 10 11 12<br />

35<br />

35<br />

Median Water Temperature 2002<br />

Water Column Temperature (oC)<br />

30<br />

25<br />

20<br />

15<br />

Rowlett<br />

Hanna<br />

30<br />

25<br />

20<br />

15<br />

I-275<br />

Platt<br />

10<br />

MthlyMedTemp_USGS.grf<br />

10<br />

1 2 3 4 5 6 7 8 9 10 11 12<br />

Month<br />

Figure 3-30. Monthly median (A) and minimum (B) water temperatures<br />

<strong>for</strong> four data recorders in the Lower Hillsborough River monitored by<br />

the USGS <strong>for</strong> 2002.<br />

3 - 59

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