Peak Runoff Calculator
Posted by Dinesh onUse the simple wastewater calculator to calculate peak runoff. Sewers must handle storm water flows during, and after, rain storms, and snowand ice-melting events. The rational formula for peak storm-water runoff is Q = C * I * A.
(i). In heavily populated urban areas C ranges from 0.70 to 0.90.
(ii). Residential areas with gardens, shrubs, and extensive open land have C values ranging from 0.30 to 0.40.
Formula:
Q = C × I × A
where,- A = drainage area
- C = coefficient of runoff of area
- I = average rainfall rate
- Q = peak runoff