Using the Manning nomograph and assuming n=0.013, determine the following:(a) An 800 mm diameter sanitary sewer is built on a slope of 0.2 percent. What is the fullflow discharge capacity of the sewer and what is the flow velocity?(b) What diameter pipe is needed to carry a peak flow of 200 liters/s on a grade of 0.007 ?(c) A 300 mm diameter sewer is built at a grade of 2 percent. What is the depth of sewage flowing in the pipe when it carries a flow of 50 liters/s? What is the velocity? 0.15 400.40.560200050400.6 -200.20.210000.7100.1800200.80.086006.0.065000.9 -40010.30.04108.30020.026.200- 0.44E0.010.0081.530012030.52702401001000.100.080:60.00680210840.060.6 0.40.004601807250150600.040.7401350.030.0020.20.812.5481200.8300.024210590360.0130.90.1F0.0010.00080.6200.50.01,75300.40.0060.060.000660240.3105240.040.000420845180.216637.50.0020.02140.000230120.1425100.010.00010.083- 0.000080.0000670.060.050.0068.0.004-0.000040.049-0.03 -103 0.0020.000020.020.80.60.0014- 0.000010.5130.010.40.00060.0000060.0080.3160.0000040.006DTLnV8 § 88 Discharge, m^3/sDischarge, ft^3/sPipe diameter, cm8 Pipe diameter, inTurning llineMannings roughness coefficient, n6-Velocity ft/sVelocity m/sSlope, %Slope, ft/ft, m/m

a.) Nomo graph solution The discharge capacity and velocity of flow is obtained from figure 2.21 ''…

Answered: s/s on a grade of 0.007 ? (c) A 300 mm…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Using the Manning nomograph and assuming n=0.013, determine the following:

(a) An 800 mm diameter sanitary sewer is built on a slope of 0.2 percent. What is the fullflow discharge capacity of the sewer and what is the flow velocity?

(b) What diameter pipe is needed to carry a peak flow of 200 liters/s on a grade of 0.007 ?

(c) A 300 mm diameter sewer is built at a grade of 2 percent. What is the depth of sewage flowing in the pipe when it carries a flow of 50 liters/s? What is the velocity?

0.15 40
0.4
0.5
60
2000
50
40
0.6 -
20
0.2
0.2
1000
0.7
10
0.1
800
20
0.8
0.08
600
6.
0.06
500
0.9 -
400
1
0.3
0.04
10
8.
300
2
0.02
6.
200
- 0.4
4
E0.01
0.008
1.5
300
120
3
0.5
270
240
100
100
0.10
0.08
0:6
0.006
80
210
84
0.06
0.6 0.4
0.004
60
180
72
50
150
60
0.04
0.7
40
135
0.03
0.002
0.2
0.8
1
2.5
48
120
0.8
30
0.02
42
105
90
36
0.013
0.9
0.1
F0.001
0.0008
0.6
20
0.5
0.01,
75
30
0.4
0.006
0.06
0.0006
60
24
0.3
10
52
4
0.04
0.0004
20
8
45
18
0.2
16
6
37.5
0.002
0.02
14
0.0002
30
12
0.1
4
25
10
0.01
0.0001
0.08
3
- 0.00008
0.00006
7
0.06
0.05
0.006
8.
0.004
-0.00004
0.04
9-
0.03 -
10
3 0.002
0.00002
0.02
0.8
0.6
0.001
4
- 0.00001
0.5
13
0.01
0.4
0.0006
0.000006
0.008
0.3
16
0.000004
0.006
D
TL
n
V
8 § 88 Discharge, m^3/s
Discharge, ft^3/s
Pipe diameter, cm
8 Pipe diameter, in
Turning lline
Mannings roughness coefficient, n
6-
Velocity ft/s
Velocity m/s
Slope, %
Slope, ft/ft, m/m

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