Determine the peak flow of return period 5 years at the outlet D. The IDF equation for the area is: i (in/hr)=120 T0.175/(tc+27) where, T = return period in years and to is time of concentration in minutes. III IV E NE VI B Catchment Area II Runoff coefficient Inlet time A C (acres) (min) I II III 2343 0.7 0.7 0.6 IV 4 0.6 10 V 5 0.5 15 VI 4.5 0.5 15 VII 4.5 0.5 15 ST00555 7 10 VII Pipe Length (ft.) Slope (%) EB 450 0.64 AB 550 0.81 BC 400 0.64 CD 450 0.64 Note: Assume the flow velocity in each pipe is 5 ft/s

Structural Analysis
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Author:KASSIMALI, Aslam.
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Chapter2: Loads On Structures
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Determine the peak flow of return period 5 years at the outlet D. The IDF equation for the area
is: i (in/hr)=120 T0.175/(tc+27) where, T = return period in years and to is time of concentration
in minutes.
III
IV
E
NE
VI
B
Catchment
Area
II
Runoff
coefficient
Inlet
time
A
C
(acres)
(min)
I
II
III
2343
0.7
0.7
0.6
IV
4
0.6
10
V
5
0.5
15
VI
4.5
0.5
15
VII
4.5
0.5
15
ST00555
7
10
VII
Pipe
Length (ft.)
Slope (%)
EB
450
0.64
AB
550
0.81
BC
400
0.64
CD
450
0.64
Note: Assume the flow velocity in each pipe is 5 ft/s
Transcribed Image Text:Determine the peak flow of return period 5 years at the outlet D. The IDF equation for the area is: i (in/hr)=120 T0.175/(tc+27) where, T = return period in years and to is time of concentration in minutes. III IV E NE VI B Catchment Area II Runoff coefficient Inlet time A C (acres) (min) I II III 2343 0.7 0.7 0.6 IV 4 0.6 10 V 5 0.5 15 VI 4.5 0.5 15 VII 4.5 0.5 15 ST00555 7 10 VII Pipe Length (ft.) Slope (%) EB 450 0.64 AB 550 0.81 BC 400 0.64 CD 450 0.64 Note: Assume the flow velocity in each pipe is 5 ft/s
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