SME
Hydraulics & Hydrology · Problem type
Steps of a storm sewer design
Use this for “In what order do you design a storm sewer: peak flow, pipe size, time of concentration, design intensity?”
Put in order
Put the design steps in order, first to last.
1
?
2
?
3
?
4
?
5
?
6
?
7
?
Assumptions
•
Each inlet’s peak flow comes from the rational method, Q = CiA, worked down the system one pipe at a time.
•
The design storm lasts as long as the time of concentration, so tc comes before the intensity read from the IDF curve.
•
A pipe is sized for the peak first, then checked: full, it should run at about 0.9 m/s or faster.
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