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Channel Parametersm
H:V
m
m/m
Channel Cross-Section
Enter channel parameters and click Calculate Flow to see results.
Manning's Equation
Q = (1/n) · A · R²⸍³ · S₀½
Key Definitions: A = Flow area · R = Hydraulic radius (A/P) · P = Wetted perimeter · T = Top width · Fr = Froude number = V/√(g·D_h)
Flow Regimes: Fr < 1 → Subcritical (mild) | Fr = 1 → Critical | Fr > 1 → Supercritical (steep)
Flow Regimes: Fr < 1 → Subcritical (mild) | Fr = 1 → Critical | Fr > 1 → Supercritical (steep)