In the region just downstream of a sluice gate, the water may develop a reverse flow region as is indicated in Fig. P4.59 and Video V10.9. The velocity profile is assumed to consist of two uniform regions, one with velocity \(V_{a}=10 \mathrm{fps}\) and the other with \(V_{b}=3 \mathrm{fps}\). Determine the net flowrate of water across the portion of the control surface at section (2) if the channel is \(20 \mathrm{ft}\) wide.

Figure P4.59

Transcribed Image Text:

Sluice gate V=3 ft/s Control surface 1.8 ft 1.2 ft (1) (2) V = 10 ft/s