The Determination of Minimum Flows for Sulphur Springs, Tampa

DRAFT
of the dam. The experiments were implemented soon after the City had completed
modification of the diversion facilities at the spring pool. The diversions were performed
by City personnel based on communications with District staff. Flow meters were not
installed in the diversion pipes until the spring of 2002, so City personnel used
estimation and adjustments during the early experiments to approximate the target
flows. Consequently, the flows during some of the experiments were not held constant
and varied from day to day. Regardless, the resulting flows from the Sulphur springs
pool were accurately measured by the USGS, and these data represent a valuable set
of experimental flow conditions.
A hydrograph of flows from Sulphur Springs for November 2001 – June 2002 in shown
in Figure 5-1, along with reference lines for when each flow experiments was conducted.
For each experiment, the District measured vertical salinity profiles in the spring run
during two separate sampling events. The first sampling event was before the controlled
release, while the second sampling event was after a few days of the controlled release.
The samples collected on two dates during June 2002 were supplementary experiments
during which sampling was conducted on only one day each.
Figure 5-1. Average daily flows from Sulphur Springs Pool for November
2001 through June 2002 with reference lines denoting periods of
experimental flow releases.
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