A rectangular flume 15.25 m long and 3.00 m wide feeds a suppressed weir under a head of 0.30 m. If the supply to the flume is cut off, how long will it take for the head on the weir to decrease to 100 mm? Use m = 1.84. 7. Determine the time required to establish flow in a pipeline of length L under a constant head H discharging into the atmosphere, assuming an inelastic pipe, an incompressible fluid, and constant friction factor f.
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