The Determination of Minimum Flows for Sulphur Springs, Tampa

DRAFT
.
1000.00
100.00
10.00
1.00
0.10
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
Fraction of Data
Figure 3-10. Flow Duration curve for daily flow values from the
Hillsborough River Reservoir.
When there is no flow from the reservoir, Sulphur Springs provides nearly all of the
inflow of low salinity inflow to the lower river. Figure 3-11 is time series graph of the
proportion of total gaged inflow to the Lower Hillsborough River represented by Sulphur
Springs. During prolonged periods, the spring provides in excess of 80% of the gaged
inflow to the lower river. Table 3-3 lists percent exceedance values for the proportion of
total gaged flow to the lower river that is comprised by Sulphur Springs. For fifty percent
of the time, flow from Sulphur Springs comprises at least 89% of the gaged inflow to the
Lower Hillsborough River. However, periodic ungaged flows of stormwater runoff from
the urbanized catchment below the dam are not included in Figure 3-11 or Table 3-3.
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