11.11 Consider the Venturi flume shown. The bed is horizontal, and the flow may be considered frictionless. The upstream depth is 1 ft, and the downstream depth is 0.75 ft. The upstream breadth is 2 ft, and the breadth of the throat is 1 ft. Estimate the flow rate through the flume.

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b = 2 ft b2 = 1 ft Plan view y1 = 1 ft y2 = 0.75 ft P11.11 Elevation view