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

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<strong>Alafia</strong> <strong>River</strong> at Lithia, FL<br />

Phosphorus (mg/l P)<br />

100<br />

80<br />

60<br />

40<br />

20<br />

0<br />

Jan-50 Jan-60 Jan-70 Jan-80 Jan-90 Feb-00<br />

<strong>Alafia</strong> <strong>River</strong> at Lithia, FL<br />

Phosphorus (mg/l P)<br />

100<br />

80<br />

60<br />

40<br />

20<br />

0<br />

0 1000 2000 3000 4000 5000<br />

Flow (cfs)<br />

Phosphorus Residuals over Time<br />

for <strong>Alafia</strong> <strong>River</strong> at Lithia, FL<br />

Parameter Residuals (mg/l)<br />

60<br />

50<br />

40<br />

30<br />

20<br />

10<br />

0<br />

-10<br />

Jan-50 Jan-60 Jan-70 Jan-80 Jan-90 Feb-00<br />

Figure 2-32. Phosphorus concentrations in water samples collected by the USGS at the<br />

<strong>Alafia</strong> <strong>River</strong> at Lithia gage. Upper plot is time series plot; middle plot is concentration<br />

versus flow, <strong>and</strong> the bottom plot is time series plot of residuals of phosphorus<br />

concentration regressed against flow.<br />

2-68

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