SCS Curve Number Runoff Model

Calculate direct runoff volume based on soil characteristics and rainfall depth.

📘 View Methodology Notes

Q = (P - 0.2S)² / (P + 0.8S) | S = (25400 / CN) - 254

Total Rainfall Depth ($P$ in mm)

Curve Number ($CN$)

Potential Maximum Retention ($S$): -

Initial Abstraction ($I_a$): -

Direct Runoff Depth ($Q$): -