Hydrograph Method Calculator
Estimate the peak discharge from a watershed using the NRCS Unit Hydrograph method.
\[
Q_{\text{peak}} = \frac{4840\, A\, P}{T_p}
\]
* Enter the watershed area (acres), rainfall excess (inches), and time to peak (min).
Step 1: Enter Parameters
Example: 50 acres
Example: 1.5 inches
Example: 60 minutes
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