WATER RESOURCES ENGINEERING (CL)
3rd Edition
ISBN: 9781119625827
Author: Mays
Publisher: WILEY
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Chapter 5, Problem 5.2.2P
To determine
The critical flow depth.
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Question 48
A circular pipe has a diameter of 1m, bed slope of 1 in 1000, and Manning's roughness coefficient
equal to 0.01. It may be treated as an open channel flow when it is flowing just full, i.e., the water
level just touches the crest. The discharge in this condition is denoted by Qfull- Similarly, the
discharge when the pipe is flowing half-full i.e., with a flow depth of 0.5m, is denoted by Qhalf. The
ratio Qfull/Qhalf İs:
A rectangular channel carries a discharge of 20 m3/sec with a width of 1 meter
and a manning roughness number n= 0.02, the flow height (y) can be assumed
(1
Chapter 5 Solutions
WATER RESOURCES ENGINEERING (CL)
Ch. 5 - Prob. 5.1.1PCh. 5 - Prob. 5.1.2PCh. 5 - Prob. 5.1.3PCh. 5 - Prob. 5.1.4PCh. 5 - Prob. 5.1.5PCh. 5 - Prob. 5.1.6PCh. 5 - Prob. 5.1.7PCh. 5 - Prob. 5.1.8PCh. 5 - Prob. 5.1.9PCh. 5 - Prob. 5.2.1P
Ch. 5 - Prob. 5.2.2PCh. 5 - Prob. 5.3.1PCh. 5 - Prob. 5.3.2PCh. 5 - Prob. 5.3.3PCh. 5 - Prob. 5.3.4PCh. 5 - Prob. 5.3.5PCh. 5 - Prob. 5.3.6PCh. 5 - Prob. 5.4.1PCh. 5 - Prob. 5.4.2PCh. 5 - Prob. 5.5.1PCh. 5 - Prob. 5.5.2PCh. 5 - Prob. 5.5.3PCh. 5 - Prob. 5.5.4PCh. 5 - Prob. 5.5.5PCh. 5 - Prob. 5.5.6P
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- Water flows in a channel of the shape of isosceles triangle of bed width 'a' and sides making an angle of 45° with the bed. Determine the relation between depth of flow 'd' and the bed width 'a' for maximum velocity and for maximum discharge condition. Use manning's formula and note that 'd' is less than 0.50a.arrow_forward6.8.11. A diversion gate backs up flow in a 5-ft wide rectangular irrigation channel (So = 0.001, 0.015). The discharge in the channel is 50 cfs. If the depth of flow at the gate is 5 ft, deter- mine the channel and flow classification (e.g., M-2, S-1) upstream of the gate and explain your supporting logic. Then determine the water surface profile by finding the depth of flow at distances of 200 ft, 500 ft, and 1,000 ft upstream of the gate. Use a spreadsheet or appropriate computer software to perform the computations. (See the book's preface for computer software suggestions.) %3D n%3Darrow_forwardQ- A triangular open channel has a vertex angle to 90° and carries flow at a critical depth of 0.30 m. What is the discharge in the channel?arrow_forward
- i need the answer quicklyarrow_forwardUniform flow is taking place in a rectangular concrete channel (n= 0.013) with a bottom width of 3 m and bed slope of 0.004. For the total discharge of 3.6 m³/s, the slope of the channel in GVF analysis is classified as: Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a b с steep mild very mild criticalarrow_forwardA right-angled triangular channel carries a flow of 16,000 l/s. The Manning's n = 0.020 and the slope is 2 m/3000 m. (a) Determine the critical depth [m] for this flow. (b) Determine Froude number for the flow when the depth of flow is 0.6 m. Determine the normal depth of flow [m]. Show your work fully.arrow_forward
- Pb-arrow_forwardIs the flow subcritical or supercritical in a 5 m wide rectangular channel with a discharge of 10 m³/sec? Take So = 0.005, n= 0.014.arrow_forwardA right-angled triangular channel carries a flow of 16,000 l/s. The Manning’s n = 0.020 and the slope is 2 m/3000 m.(a) Determine the critical depth [m] for this flow.(b) Determine Froude number for the flow when the depth of flow is 0.6 m.(c) Determine the normal depth of flow [m]arrow_forward
- -1/3 The discharge in a channel with bottom width 3 m is 12 m³ s¹. If Manning's n is 0.013 m and the streamwise slope is 1 in 200, find the normal depth if: a) the channel has vertical sides (i.e. rectangular channel); b) the channel in tranenoidal with sid 200 2H. 1 Varrow_forwardProblem 7-61arrow_forwardUniform Flow Rectangular Channel A rectangular channel has a base width of 12 feet, a slope of 0.006 ft/ft, a manning's n of 0.035, the flow rate is 180 cubic feet per second (CFS). Find the flow depth (y) assuming Uniform Flow and Manning's Equationarrow_forward
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