Critical Depth Calculator
Compute the critical depth y_c of open-channel flow (minimum specific energy).
Input Data
Unit Discharge
m²/s
Results
0.4671m
At a glance:y_c = (q²/g)^(1/3); at critical flow Fr=1. Complements hydraulic-radius and froude-number.
Formula
y_c = (q² / g)^(1/3).
$$y_c = \left(\dfrac{q^2}{g}\right)^{1/3}$$How to Use
- Enter unit discharge and g.
- The tool returns critical depth and velocity.
Case Studies
q=2, g=9.8
y_c ≈ 0.742 m.
FAQ
Critical means?
Specific energy is minimum for the given discharge.
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References
Content review: Calculatorism Science Team. Results are for reference only; please refer to the relevant authorities for the official figures.