Hydrograph Method Peak Discharge Calculator

Estimate the peak discharge from a rainfall event using a simplified triangular hydrograph method.
Runoff Volume: \( V = R \times A \times 27878.4 \) (ft³)
Peak Discharge: \( Q_p = \frac{2V}{T} \) (ft³/s)

* Enter the watershed area (acres), rainfall excess (inches), and runoff duration (hours).

Step 1: Enter Parameters

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

Example: 50 acres

Rainfall Excess, \(R\) (inches):

Example: 1 inch

Runoff Duration, \(T\) (hours):

Example: 3 hours

Step 1: Enter Parameters

Calculated Results