WATER RESOURCES ENGINEERING (CL)
3rd Edition
ISBN: 9781119625827
Author: Mays
Publisher: WILEY
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Chapter 5, Problem 5.5.1P
To determine
Whether the jump from upstream from the construction, and if yes, then how far and type
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Q4. Water flows within the rectangular channel shown with a flow of 8 m3/s. Given that the
specific energy is E=2m. Determine:
a)
The two possible flow depths are y,=..
....m, and
Y2=.
....m.
b)
The critical depth of the flow is
..m.
c)
The flow type: (1) super critical; (2) subcritical; (3) critical flow; (4) cannot
be
found without knowing the slope of the bed.
d)
The minimum specific energy of the flow is
.m.
e)
Plot the specific energy diagram.
3m
4- In a rectangular channel, a hydraulic jump occurs at a point where depth of water-
before and after the jump was 0.6 m and 1.15 m respectively. Determine the
discharge per unit width and critical depth (yc).
At a wastewaterdischarge point, 2500 L/s of effluent must be conveyedin a straight rectangularchannel at a depth not exceeding 0.55 m. The smooth concrete channelbase is 1.8 m wide. Thechannelsides are constructed of rough-formed concrete.(a) Compute the flow area, wetted perimeter, and hydraulic radius at a section.(b) Compute the suitably-weighted roughnessfactorfor this flow condition.(c) Using Manning’s method, compute the section factor and conveyanceat this section.(d) What channelslope is required to convey the specified discharge?(e) What are the average and maximum shear stresses exerted against the channel?(f) Considering the calculated shear stresses, what is your assessment of the potential channelstability?
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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- Find the uniform flow discharge in a 5 ft diameter reinforced concrete pipe (RCP) on a longitudinal slope of 0.003. The flow depth at pipe is 3 ft. Use Table C-2 for roughness coefficient.arrow_forwardHydraulic Jump Given a 12-foot rectangular channel with an upstream Froude Number of 4.2 (Fr1-4.2) and a flow rate of 45 cubic feet per second (CFS) Find: The subsequent depth (Y2) Energy Loss Across the Hydraulic Jump How much energy in Pounds (lbs) is lost across the jump Y2arrow_forwardQuestion- OCF A rectangular channel carrying a super critical flow is to be provided with a hydraulic jump type of energy dissipator. Energy loss required in the hydraulic jump is 8 m and inlet Froude number is √6. The initial sequent depth is?arrow_forward
- ● Design a regime channel to carry a discharge of 40 cumecs by Lacey's Theory. Assume side slopes to be 1: 1. The average size of the bed material may be taken as 0.8 mm.arrow_forwardA triangular duct flows partly full having a bed slope of (0.004) as shown in Fig. (1) below. If the flow depth is (0.6 m), and manning's n= 0.016, compute: 1- Top width 2- Discharge 3- Is the flow subcritical or supercritical? 4- Is the flow laminar or turbulent? 1 m 1marrow_forwardPROBLEM 1 A rectangular channel 12 in wide and 30 ft long yielded the following test results: with still water, Z₁ - Z2 = 0.010 ft; with a measured flow of 0.20 cfs, y₁ = 0.40 ft, y2 = 0.405 ft. Determine the following: (a) V₁ (ft/s), (b) V₂ (ft/s), (c) head loss, hu(1-2), (ft), (d) slope of EGL, S, and (e) roughness factor "n".arrow_forward
- The flow rate in a channel with area of 25 m2 has an average depth of 3 meters - was recorded at 200m3/s. Compute for the Froude Number.arrow_forwardDesign a coarse screen for a flow 0.45 m3/sec. The screen is placed in a canal 0.9 m in width and 0.6 m in height. Use rectangular bars 10 * 30 mm in cross section.arrow_forwardAt a wastewaterdischarge point, 2500 L/s of effluent must be conveyedin a straight rectangularchannel at a depth not exceeding 0.55 m. The smooth concrete channelbase is 1.8 m wide. Thechannelsides are constructed of rough-formed concrete. (a) Compute the flow area, wetted perimeter, and hydraulic radius at a section. (b) Compute the suitably-weighted roughness factor for this flow condition and Using Manning’s method, compute the section factor and conveyanceat this section. (c) What channel slope is required to convey the specified discharge? What are the average and maximum shear stresses exerted against the channel?arrow_forward
- H.w coarse 1 Q1 The water elevations upstream and downstream of a bar screen are 0.89 m and 0.85 m. If the approach velocity is 0.45 m/s, what is the flow velocity through the screen? The discharge coefficient of the screen is 0.7.arrow_forwardA primary clarifier for a municipal wastewater treatment plant is to be designed for an average flow of 7570 m3/d. the regulatory agency criteria for primary clarifiers are as follows: peak overflow rate = 89.6 m3/m2.d, average overflow rate = 36.7 m3/m2d, minimum side water depth = 3 m, and peak weir loading rate = 389 m3/m.d. The ratio of peak flow to average flow = 2.75. Determine: Diameter of the sedimentation basin The length of the peripheral weir. Assume that the weir launder has a width of 50 cm (from the tank side), and the weirs are installed on one side of the launder.arrow_forwardWater in a 6-m-wide rectangular channel flows at a rate of 4 m³/s at a depth of 0.6 m. (a) What is the velocity (m/s) of flow upstream of the hump? (b) Is the flow (0.6 m-depth) super-critical or sub-critical? Compute the Froude number. (c) What is the critical depth, Yc (m)? (d) What should be the height, YH (m), of the hump to be installed if we want critical depth to occur? Yc 0.6 m HUMP Profile of channel YHarrow_forward
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