Water is flowing at a depth of 10.0 ft with a velocity of 10.0 ft/s in a channel of rectangular section. a)If there is a smooth contraction in the channel width from 10.0 ft to 9.0 ft, calculate the flow depth in feet in the contracted section using a solver. b)If there is a smooth contraction in width from original upstream width of 10.0 feet, find the minimum width (in feet) in the contraction so that choking is prevented.

Water flows over a spillway of a dam. At the bottom of the spillway, water flows into a rectangular concrete-finished channel (width - 50 ft) with a slope of 0.005. Let n-0.0206. 2.5 ft d, - 2.9 ft a) Calculate the velocity in the channel at the section where the depth is 2.9 ft. Use Manning's equation. (15) b) Determine Froude number at the section where the depth is 2.9 ft and classify the flow. (15) c) Classify the flow where the depth is 2.5 ft and prove your classification. (15) d) What do you expect the flow to be at depth d2 (just an educated guess)? (5)

A rectangular open channel has a base of length 2b, and the water is flowing with a depth of b. Sketch this channel. How would you sketch this channel?

1Water flows through a rectangular sharp-crested weir with a channel width of 2 m. The channel depth is 1 m with a weir head of 0.1 m.       Calculate the discharge.   Make a sketch of the channel along with the weir pieces