flm tables
DESCRIPTION
Tablas tipo para los canales con seccion de controlTRANSCRIPT
Pre-Computed Flume TablesWater Measurement Manual, pg. 8-24 to 8-41
• Trapezoidal lined canals– Broad-crested weir with trapezoidal control section
shape (a.k.a. “Replogle flume or weir”)
• Earthen canals– Structures with a rectangular control section shape
• Circular pipes, culverts, etc.– Broad-crested weir composed of a ramp and sill in a
circular pipe
Trapezoidal Lined Canals
Rectangular-Throated Structures
Weirs in Pipes and Culverts
Using the Tables• Pre-computed designs already ensure:
– Froude number less than 0.5
– Adequate measurement accuracy at Qmin
– Adequate measurement accuracy at Qmax
• User must check:– Freeboard at Qmax
– Submergence at Qmax
– Submergence at Qmin
– Lengths of flume components