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Fteley and Streans Formula and Calculator

Fteley and Streans Weirs Formula and Calculator

Preview Fteley and Streans Formula Calculator

The Fteley and Stearns formula (lengths 5 ft and 19 ft under heads from 0.07 ft to 1.63 ft) for suppressed weirs is

${\displaystyle Q=3.31b{(H+\mathrm{\alpha <!--\; \alpha \; -->}\frac{V^2}{2g})}^{3/2}+0.007b}$

where

α = factor dependent upon crest height Z (tables of values required).
H = head on weir in feet (or meters) (height of level liquid surface above crest)
V = average velocity of approach in ft/sec or m/s.
b = length of weir crest in feet (or meters)
Q = flow in cfs (or m³/s)
g = gravity ft/s², (m/s²)

Source:

Schaum's Outline of Fluid Mechanics and Hydraulics

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