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MindTap Engineering for Garber/Hoel's Traffic and Highway Engineering, 5th Edition, [Instant Access], 1 term (6 months)
5th Edition
ISBN: 9781305577398
Author: Nicholas J. Garber; Lester A. Hoel
Publisher: Cengage Learning US
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Chapter 16, Problem 6P
To determine
(a)
The definition of drainage area.
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QUESTION 1: Answer the following questions. Draw sketches where needed.
a)
Explain the functions of manholes in sewage systems.
b)
What types of sewage systems are used? Explain.
c)
Explain the runoff coefficient.
d)
Explain the inlet time, flow time and concentration time in storm water systems.
e)
Determine the hydrographs when the flow time is 5 minutes and rainfall durations are 3, 5, and 7
minutes respectively. Discuss.
QUESTION 2: The layout of the storm water collection system is given below with areas that served by
each channel, run-off coefficients, inlet times for starting manholes and flow times for channels.
Determine the discharges of all channels for the design rainfall of n=2 and T=15min. (Rainfall yield r= lab
I/s.ha is for the rainfall of n=1 and T=15 min.)
t; =15min
(4)
A=4,a ha.
A=2,b ha.
A=3,a ha.
A=1,b ha.
C=0.45
t; =5min
t=10min
C=0.60
C=0.75
C=0.60
(1) t;=6min
(2)
t=4min
(3) tę =3min (5)
A=2,b ha
C=0.50
te =3min
Pipe Sizing and Runoff
A development has a runoff coefficient of 0.4, a drainage area of 45 acres, and a 25-year intensity of 1.9
inch/hour.
Find the peak flow rate using the rational method and size a circular pipe to convey the 25-year flow rate.
1. The term "Industrial wastewater" involves:
(@ Contaminated cooling water. Contaminated process waters and wash-down waters.
b. Water discharged from homes, businesses, schools and offices
c. Contaminated rain water collected at industrial plant
d. (a +b+c) are the correct answers
tmont.
Chapter 16 Solutions
MindTap Engineering for Garber/Hoel's Traffic and Highway Engineering, 5th Edition, [Instant Access], 1 term (6 months)
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