Flow Rate Q (m³ s^-1)

Channel Width B (m)

Upstream Depth h₁ (m)

Downstream Depth h₂ (m)

Depth Ratio h₂/h₁

Upstream Velocity v₁ (m s^-1)

Downstream Velocity v₂ (m s^-1)

Velocity Ratio v₁/v₂



Upstream Froude Number Fr₁

Downstream Froude Number Fr₂

Froude Number Ratio Fr₁/Fr₂

Fr₁ < 1.0 : Subcritical Flow
Fr₁ = 1.0 : Critical Flow
1.0 < Fr₁ < 1.7 : Supercritical Flow, Undular Jump
1.7 < Fr₁ < 2.5 : Supercritical Flow, Weak Jump
2.5 < Fr₁ < 4.5 : Supercritical Flow, Oscillating Jump
4.5 < Fr₁ < 9.0 : Supercritical Flow, Steady Jump
Fr₁ > 9.0 : Supercritical Flow, Strong Jump
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Fr₂ < 1.0 : Subcritical Flow
Fr₂ = 1.0 : Critical Flow
1.0 < Fr₂ < 1.7 : Supercritical Flow, Undular Jump
1.7 < Fr₂ < 2.5 : Supercritical Flow, Weak Jump
2.5 < Fr₂ < 4.5 : Supercritical Flow, Oscillating Jump
4.5 < Fr₂ < 9.0 : Supercritical Flow, Steady Jump
Fr₂ > 9.0 : Supercritical Flow, Strong Jump