WATER RESOURCES ENGINEERING
3rd Edition
ISBN: 9781119490579
Author: Mays
Publisher: WILEY
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Chapter 5, Problem 5.3.1P
To determine
The distance from the vena contracta to a point b downstream
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if the median size of bed material of a natural
channel is 1.2 mm, then the Manning's n
coefficient for the channel is about
0.027
.a
0.041 .b
0.012
.C
0.035 .d
if the median size of bed material of a natural
channel is 1.2 mm, then the Manning's n
coefficient for the channel is about
а.
0.027
0.041
Ос.
0.012
o d. 0.035
The open channel shown in the following figure is constructed of smooth concrete. Water flows at 3.0 m2/s in
uniform flow. What is the minimum slope? Use a reasonable value of the Manning's roughness coefficlent (i.e.
for smooth concrete, use n= 0.013). Given that w = 3.3 m.
W.
concrete
channel
water
60
O a. 0.00011
O b.0.00106
Oc.0.00498
O d.0.00064
O e. 0.00204
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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- An open channel is to be designed to carry 1 m3/s at a slope of 0.0065. The channel material has n = 0.011. What is the optimum depth for a rectangular section? Select the correct response: 0.69 0.48 0.43 0.46arrow_forwardWater flows in a rectangular open channel that is 10m wide, at a depth of 2.5m. The Manning roughness coefficient of the sides of the channel is 0.015 and the bottom of the channel is 0.010 . Calculate the equivalent roughness coefficient by using Horton –Einstein approach.arrow_forwardFind the bed width and bed slope of a canal having the following data: Discharge of the canal = 40 cumec Permissible mean velocity = 0.95 m/sec. Coefficient of rugosity, n = 0.0225 Side slope = 1:1 B/D ratio = 6.5 %3Darrow_forward
- H.W 2 Find the bed width and bed slope of a canal having the following data. Discharge of the canal = 40 cumec Permissible mean velocity = 0.95 m/sec. Coefficient of rugosity, n = 0.0225 Side slope = 1:1 B/D ratio = 6.5 %3Darrow_forwardQ5: The bed slope of a regime canal is 1/5500. Determine the canal section and discharge by using Lacey's theory. The average particle size is 0.35 mm.arrow_forward2. A 1.50 m diameter circular channel flowing at maximum velocity is to be replaced by a trapezoidal channel of the most efficient section with one side slope at 2V:3H and the other at 4V:3H. The two channels have the same longitudinal slopes of 0.010 and the same roughness coefficient, n = 0.030. Determine the dimensions of the trapezoidal channel using Manning's equation. need complete solution with illustrationsarrow_forward
- For a triangular channel with the horizontal dimension of the side slope is 3 (i.e Z-3), a normal depth 2.74 in ft, and a channel bed slope of 0.001. The channel is lined with concrete with a roughness coefficient 0.013. Calculate the velocity in fps. (1.486 (S^0.5)*(((3*(yn^2)/(2*yn´(10^0.5)))^(2/3)))/n 4.3arrow_forwardQ3/ Find bed width (B) and depth of flow (y) of a rectangular open channel, if, Flow rate in the channel Q = 250 (m³/s). Longitudinal slope of bed level of the channel S, = 0.0001, Manning's coefficient n = B = 20y. (1/3) 0.025 (s/m/3). %3Darrow_forwardA flow rate of 2.1 cu.m./s is to be carried in an open channel at a velocity of 1.3 m/s. n = 0.020. A. Determine the required slope in x10^-3 (2 decimal places) if the channel is a semi-circular section. B. Determine the required slope in x10^-3 (2 decimal places) if the cross section is trapezoidal with depth equal to the width of the channel bottom and side slope 1:1. C. Determine the required slope in x10^-3 (2 decimal places) if the cross section is rectangular with depth equal to 1/2 its width.arrow_forward
- A compound channel in Figure Q2(b) has bottom slope of 0.6- percent . Calculate velocity and discharge of the channel if Kutter coefficient n is 0.042.arrow_forwardExample(): Given below a part of project. Calculate the water level at the head of the distributary canal D1 if the head loss in each water course is 30 cm. and the minimum allowable slope is 20 cm/Km. The length of each water course is 1.350 Km and the head loss in the distributary canal D1 is 25 cm. 15.5 15.0 16.0 14.0 19.0 17.0 14.5 13.5 16.5 20.0 R1 R2 R3 Branch canal R4 0.00 K0+100 KO+600 D1 K1+100 K1+600arrow_forwardDetermine the critical depth of a rectangular channel having a velocity of 2.215 m/s.arrow_forward
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