Questions (3.2) Determine using the 'rational formula' with runoff co-efficient equal to 0.80, the peak storm runoff to be carried out by the underground drainage pipeline AB for the drainage basin area of 0.2 ha as shown in the given figure. Take the length of pipeline as 100 m and the level difference between A and B as 0.5 m. Assume initially a pipe diameter of 250 mm. Consider Darcy- Weisbach friction factor f = 0.015. The rainfall duration and rainfall intensity is furnished in tabular form below. Consider time of entry at end A as 2 min. Drainage basin Duration (mins) 2.0 2.5 3.0 3.5 4.0 4.5 Pipeline Rainfall intensity (mm/hr) 122 108 97 89 82 77 Check whether the pipe size is adequate or not.
Questions (3.2) Determine using the 'rational formula' with runoff co-efficient equal to 0.80, the peak storm runoff to be carried out by the underground drainage pipeline AB for the drainage basin area of 0.2 ha as shown in the given figure. Take the length of pipeline as 100 m and the level difference between A and B as 0.5 m. Assume initially a pipe diameter of 250 mm. Consider Darcy- Weisbach friction factor f = 0.015. The rainfall duration and rainfall intensity is furnished in tabular form below. Consider time of entry at end A as 2 min. Drainage basin Duration (mins) 2.0 2.5 3.0 3.5 4.0 4.5 Pipeline Rainfall intensity (mm/hr) 122 108 97 89 82 77 Check whether the pipe size is adequate or not.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:Questions (3.2)
Determine using the 'rational formula' with runoff co-efficient equal to 0.80, the peak storm
runoff to be carried out by the underground drainage pipeline AB for the drainage basin area of
0.2 ha as shown in the given figure. Take the length of pipeline as 100 m and the level difference
between A and B as 0.5 m. Assume initially a pipe diameter of 250 mm. Consider Darcy-
Weisbach friction factor f = 0.015. The rainfall duration and rainfall intensity is furnished in
tabular form below. Consider time of entry at end A as 2 min.
Drainage basin
Duration
(mins)
2.0
2.5
3.0
3.5
4.0
4.5
A
Pipeline
Rainfall intensity
(mm/hr)
122
108
97
89
82
77
Check whether the pipe size is adequate or not.
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