Youghiogheny Flow at the Tailrace

The flow in the Youghiogheny River just upstream of the tailrace is estimated by the following equation: See this reference on p.3-5.

\(Q_F = Discharge\, at\, Friendsville\, (cfs)\)
\(Q_{o} = Discharge\, at\, Oakland\, (cfs)\)
\(Q_{tr} = 0.8 * Q_F\)
\(Q_{tr} = Discharge\, Above\, Tailrace\, (cfs)\)

The flows at Oakland and Friendsville are obtained from USGS flow gages, stations #03075500 and #03076500 respectively. (Note that a different equation is proposed in the same reference, p.4-33 Appendix B of Appendix G ), namely \(Q_{dc} = 1.68 * Q_o^{0.97}\) )

A graph showing the difference between these two relationships is shown in Figure 1.