3. A rectangular channel has the following properties: b=5m, So=0.005, n=0.017. The flow rate in the...
A rectangular channel with slope So = 0.005, n = 0.015. The width is b = 4.0 m and discharge in the channel is Q = 12.0 m/s. If the water depth at a given section along the channel is y: = 0.92 m, determine the distance from the section where the flow depth reaches the normal depth (14 marks). Explain your solution, showing your results in a clearly labelled sketch (6 marks).
Q1) Consider a rectangular channel with a constant width b, a) Obtain the equation of water surface profile (dy/dx) as function of Froude number and channel bottom slope in a channel transition assuming that over a short distance Ax, the energy losses can be neglected. b) Using the equation you have obtained, draw the water surface profile if flow is supercritical and if there is a downward step at the channel bed and show your results on the graph of...
Water flows down a rectangular channel that has a width of 2.2 m, a Manning's n of 0.019 and a slope of 1 in 200. Calculate the discharge in the channel when the depth of flow is 0.5 m, 1.0 m, 2.0 m, and 4.0 m. Plot a graph of depth against discharge and comment on its shape, [10 marks] A wide channel has a Manning's number = 0.021, a longitudinal bed slope of 1:250 and conveys 0.XX m3/s/m of...
In a rectangular channel, water flows at a flow rate of 15 m3 / s. The width of the canal is 4.0 m and the water depth is 2.5 m. Without causing the water in the blast to swell: a) If the channel is narrowed without raising the channel base, what is the minimum value that the base width can take? b) Find the maximum threshold height that can be placed on the base without changing the channel width. c)...
A 10-m wide rectangular channel is carrying a discharge of 400 m3/s at a flow depth of 3.0 m. Determine the flow depth downstream of a step of 0.3 m if the step is: (i) a rise, and (ii) a drop. Does the water surface rise or drop downstream of the step in each case?
Problem #3 A rectangular channel is 25 ft wide and has a flow of 500 cfs at the velocity of 5 ft/sec a) Determine the specific energy of water in the channel b) What is the critical depth of flow in the channel c) What is the critical velocity
02) A long rectangular channel is 3 m wide with Manning roughness of 0.018 and bottom slope of 2%. The channel runs downstream from a reservoir into a free overfall at its end. In the reservoir the water surface level is 1.35 m above the bed of the channel at the entrance. Ignore local loss at entrance. a) Calculate the critical depth, the discharge and the normal depth of the channel. (5/8) b) Sketch the water surface profile in the...
B) A weir of 6 m long is to be built across a rectangular channel to discharge a flow of 7.5 m3/sec. If the maximum depth of water on the upstream side of weir is to be 1.5 m, what should be the height of the weir? Adopt Cd = 0.6.
15. A rectangular open concrete (n-0.012) channel is to be designed to carry a flow of 5 m/s. The slope is 0.003 m/m and the bottom width of the channel is 5 meters. Determine the normal depth that will occur in this channel. (A) 0,4 m (B) 0.47 m (C) 0.5 m (D) 0.77 m
Water flows in a 100 ft wide rectangular channel at flow rate = 300 ft3/sec. Manning's n = 0.015 and the bottom slope = 0.002. Calculate/answer the following: a. the uniform (normal) flow depth assuming the channel is wide and shallow. b. the critical flow depth. c. the flow depth upstream of a hydraulic jump with downstream depth = normal depth. d. the type of channel slope at the given normal depth: mild, critical, or steep (select one). f. the basis for your answer in...