Stormwater Peak Discharge Calculator

Calculate the peak discharge using the Rational Method:
\[ Q = C \times I \times A \]

* Enter the runoff coefficient (C), rainfall intensity (I in in/hr), and drainage area (A in acres).

Step 1: Enter Parameters

Runoff Coefficient, \( C \):

Example: 0.5 (dimensionless, between 0 and 1)

Rainfall Intensity, \( I \) (in/hr):

Example: 2 in/hr

Drainage Area, \( A \) (acres):

Example: 50 acres

Calculated Peak Discharge