H Flume Accuracy
In Discharge Measurement Structures, Bos presents the unified flow equation for H flumes as accurate to within +/- 3%.
Other sources provide precision ranges from +/-2-5%.
H Flume Discharge Equations
The unique shape of the H flume – more weir than flume – has meant that the discharge equation for the flume is, in fact, not one equation but three equations: one for low flows, one for traditional flows, and one for main flows.
Bos et al simplified these equations into one standard relationship:
H Flume Flow Tables
Free-flow discharge tables for HS / H / HL flumes can be found in the Discharge Tables section.