8.11) Water flows through a rectangular channel 2.0m wide at a flow rate of 12.0m³/s. A submerged obstruction 0.40m high is placed across the channel floor. Assuming frictionless flow, determine the increase or decrease in water level if the original depth before the obstruction is 3.0m.

Water is discharged under a sluice gate at a rate of 75 m3 /s into a frictionless, horizontal, rectangular channel, 6 m wide. The depth just downstream of the gate is 1.25 m. Determine the depth just upstream of the gate opening The Froude number upstream and downstream of the sluice gate

Water flows under a sharp-edged sluice gate in a 10-ft wide channel. If the upstream depth remains constant at 5 ft, determine the flowrate through the gate when a = 1.2 ft (see figure below). Assume free outflow. ex Y₁ = 5 ft a

A partially open sluice gate discharges water into a rectangular channel. The tail water depth in the channel is 3m and Froude number is 1/2/2. If a free hydraulic jump is to be formed at downstream of the sluice gate after the vena contracta of the jet coming out from the sluice gate, the sluice gate opening should be (coefficient of contraction Cc = 0.9)

Problem #4 Hydraulic JumpA hydraulic jump occurs in a rectangular channel 4.0 m wide. The water depth before the jump is0.4 m. If the flowrate is 20 m3/s, determine the depth after the jump and the critical depth at thejump.

4. The water at the floodgate looks like in the picture with V1 = 0.2 m/s and y1 = 1m. Calculate: - depth at point 2 - flow velocity at point 2 - Froude Number value Gap = 20 cm (1) (2)

Open channel flow problem for a rectangular channel. For a wide rectangular channel: Channel Width = 50 feet Flow rate= 250 cfs Channel slope= 0.0004 ft/ft Manning’s n=0.03 Vary the flow depth from 0.2 feet to 5 feet. Compute and plot the specific energy curve. c. At normal depth will disturbances propagate upstream (i.e. downstream control)? d. If the flow depth at a location was 2 feet: a. What type of backwater curve would this flow depth be on? b. Would the flow depth be getting deeper or shallower in the downstream direction? c. Which direction would backwater computations progress (upstream to downstream or downstream to upstream)? ANSWER AND EXPLAIN FOR A GOOD RATE!