Direct runoff using the SCS Curve Number method (Ia = 0.2 S).
Retention S:
— mm
Initial abstraction Ia:
— mm
Effective rainfall Pe:
— mm
Runoff coefficient Pe/P:
—
Runoff volume:
— m³
S = 25400/CN − 254 |
Ia = 0.2 S
Pe = (P − Ia)² / (P − Ia + S), for P > Ia
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