A rectangular channel has a width b = 19 m. The critical specific energy in the channel (E) = 28 m. Then, the flow rate in the channel is

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Problem 4 Water flows in a rectangular channel with channel width B = 4.0 (m). The specific energy diagram (SED) of this flow is given in the figure below. (y =0.2 m) (1) Estimate the channel discharge Q from the given SED. (2) If the water depth in the channel at a cross section is y₁ = 0.45 (m). The channel bottom is raised smoothly by Az = 0.2 (m). Determine if the flow will be "choked" by the raised step. If yes, estimate the "backed up” depth upstream, y₁. If not, what is the water depth y₂ above the step? y (m) 0.55 0.5 0.45 0.4 0.35 > 0.3 0.25 0.2 0.15 0.1 0.2 0.25 0.3 0.35 0.4 0.45 0.5 0.55 E (m)

Energy Equation: Example 2: h₂ 80 m = Datum D = 0.2 m 0.02)V² 2g L = 2000 m- = 0.02 V² D2g A horizontal pipe carries cooling water at 10°C for a thermal power plant. The head loss in the pipe is hL Q = 0.06 m³/s where L is the length of the pipe from the reservoir to the point in question, V is the mean velocity in the pipe, and D is the diameter of the pipe. If the pipe diameter is 20 cm and the rate of flow is 0.06 m³/s, what is the pressure in the pipe at L = 2000 m? Assume a₂ = 1.