The storm sewer system shown below receives storm water from five subareas (A, B, C, D, E,F and G). For each subarea; the drainage area, the longest flow path length, the slope of ground surface and runoff coefficient are as given in Table I. Estimate storm water flowrate received by each of the four inlets. Assume the area is dense residential area. The diameters and lengths of sewer given in table Sewer line Diameter Length (m) From To (mm) I1 13 300 136 12 13 300 110 13 14 400 120 zone Area (m²) L Slope Runoff (m) of ground surface coefficient A 8000 75.8 0.01 0.8 B 12000 127.3 0.0081 0.7 C 12000 121.2 0.012 0.4 D 20000 194 0.01 0.6 E 20000 200 0.01 0.6 F 22000 220 0.01 0.6 G 21000 215 0.01 0.6 B A E w 12 13 F 14 Plan layout
The storm sewer system shown below receives storm water from five subareas (A, B, C, D, E,F and G). For each subarea; the drainage area, the longest flow path length, the slope of ground surface and runoff coefficient are as given in Table I. Estimate storm water flowrate received by each of the four inlets. Assume the area is dense residential area. The diameters and lengths of sewer given in table Sewer line Diameter Length (m) From To (mm) I1 13 300 136 12 13 300 110 13 14 400 120 zone Area (m²) L Slope Runoff (m) of ground surface coefficient A 8000 75.8 0.01 0.8 B 12000 127.3 0.0081 0.7 C 12000 121.2 0.012 0.4 D 20000 194 0.01 0.6 E 20000 200 0.01 0.6 F 22000 220 0.01 0.6 G 21000 215 0.01 0.6 B A E w 12 13 F 14 Plan layout
Traffic and Highway Engineering
5th Edition
ISBN:9781305156241
Author:Garber, Nicholas J.
Publisher:Garber, Nicholas J.
Chapter16: Highway Drainage
Section: Chapter Questions
Problem 6P
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Question
Transcribed Image Text:The storm sewer system shown below receives storm water from five
subareas (A, B, C, D, E,F and G). For each subarea; the drainage area, the
longest flow path length, the slope of ground surface and runoff coefficient
are as given in Table
I.
Estimate storm water flowrate received by each of the four inlets.
Assume the area is dense residential area. The diameters and lengths of
sewer given in table
Sewer line
Diameter
Length (m)
From
To
(mm)
I1
13
300
136
12
13
300
110
13
14
400
120
zone
Area (m²)
L
Slope
Runoff
(m)
of ground surface
coefficient
A
8000
75.8
0.01
0.8
B
12000
127.3
0.0081
0.7
C
12000
121.2
0.012
0.4
D
20000
194
0.01
0.6
E
20000
200
0.01
0.6
F
22000
220
0.01
0.6
G
21000
215
0.01
0.6
B
A
E
w
12
13
F
14
Plan layout
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