WATER RESOURCES ENGINEERING
3rd Edition
ISBN: 9781119490579
Author: Mays
Publisher: WILEY
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Chapter 5, Problem 5.4.2P
To determine
The computations of backwater at mile 2.0
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The discharge in an open trapezoidal channel was measured by slope area method. Depth of water = 2.50m, Bottom width of
channel 3.10m, Width of channel at the water surface = 5.10m. Determine the area of cross section.
Select the correct response:
9.80 sq.m.
10.25 sq.m.
11.55 sq.m.
12.45 sq.m.
A laboratory flume (n=0.012) is 10 in wide and set on a slope of 0.0003. With a measured flow of 0.1516cfs, the depth is observed to vary between 0.361 and 0.366 ft. Classify the water-surface profile. Show all necessary calculations, and sketch the profile
Water Resources Engineering: Open Channel Flow
A 3.7 meter wide rectangular channel with with a bed slope of 0.00019 and a depth of flow of 2.2 meters. Manning's roughness coefficient is 0.019.
Find:
a) Can Manning's equation be applied to this system (i.e. Is the flow fully turbulent)?
b) Regardless to the answer to part a, determine the steady uniform discharge in the channel (i.e. the "normal depth")
Chapter 5 Solutions
WATER RESOURCES ENGINEERING
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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- what is the depth of uniform flow rate in a rectangular planned woood channel with Manning's n=0.012,width of 2.0m and a bed slope of 0.002,when the flow rate is 4m3/sarrow_forwardWater 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_forwardQuestion 11 of 23 A discharge of 1.2 m3/s flows on an open channel with a slope of 0.0062. If the coefficient of roughness is 0.0123, compute the depth of the channel for an optimum discharge for a triangular section. Select the correct response: 0.49 m 0.41 m 0.51 m 0.69 m < Previous Continuoarrow_forward
- Determine the normal depth (m) in a rectangular channel with flowing discharge of 70 m3/s, roughness of n=0.025, slope of 0.001, with bottom width of 6 meters.arrow_forward5. Determine the backwater profile created by an obstruction in a channel causing a backup of 5.0 feet. The channel is trapezoidal as defined below and conveys a discharge of 200 cfs. Use the standard step method. 2 n = 0.030 So = 0.0050 ft/ft 8.0' the answer should be (backwater profile)arrow_forwardA rectangular channel Carrie's water to a depth of 1.8m. In order to measure the discharge, the channel width reduces to 2.4m and a hump of 0.3m height is provided in the bottom. Calculate the discharge if the water surface in the contracted section drops by 0.15marrow_forward
- Qle: A flow rate of 2.4m ^ 3 /sec is to be carried in an open channel at a velocity of 1.5 m/sec. If the channel cross section is trapezoidal with water depth equal to the width of the channel bottom and side slope of 1:1. Manning roughness coefficient is 0.03. Determine: a) The bottom width b) The channel bed slopearrow_forwardFind the normal depth for a discharge of 350cfs in a rectangular channel with a bottom widith of 20 ft. The channel is concrete lined (n=0.013) with a slope of 0.75%. Use mannings equationarrow_forwardThe bottom width and bed slope of a long rectangular channel are 4.0 m and 0 0008, respectively. The volumetric steady-state discharge is 1.50 m/s. The flow depth at a specific location is 0 30 m. Ifn=0.016, determine: (a) The type of water surface profile expected Show all work and state your reasoning in support of your work Pleasell!! (b) Sketch the water surface profile with all necessary information and labels shownarrow_forward
- Q3/ determine the discharge in the compound open channel shown in figure assume a bed slope (0.001) and the Manning coefficient is 0.03. * flood plain main channel flood plain 0.2m 10m 0.5m 10m 5marrow_forwardPROBLEM 6 Water 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, Y. (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_forwardEx. A small stream has a cross section which can be approximated by a trapezoid. The cross-sectional properties at three sections are shown below. Section A is the downstream-most section. For a discharge of 100.0 m³/s in the stream, water surface elevation at Section A was recorded as 104.5 m. Estimate the water-surface elevation at the upstream Section B and Section C. Assume Manning's roughness n = 0.02 and energy coefficient a = 1.0 at all sections. Section A B C Distance Up the River (km) 100.00 102.00 103.50 Bed Elevation (m) Bed Width (m) Side Slope 100.000 14.0 1.5:1 100.800 12.5 1.5:1 101.400 10.0 1.5:1arrow_forward
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