Hydraulics2D
Open Channel Flow: Non-Uniform Flow - Theory & Concepts - Specific Energy
Specific energy, critical controls, momentum function, hydraulic jumps, gradually varied flow equations and profiles, and direct- and standard-step computations.
Open the complete lessonSpecific Energy and Alternate Depths
Rectangular channel with a numerically bracketed alternate-depth solution.
- Unit discharge
- 5.000 m²/s
- Critical depth
- 1.3659 m
- Minimum energy
- 2.0489 m
- Selected energy
- 2.0663 m
- Selected regime
- Subcritical (Fr=0.869)
- Alternate depth
- 1.24734 m
- Alternate regime
- Supercritical (Fr=1.146)
- Energy residual
- -9.69e-11 m
For any energy above the minimum, the shallow and deep roots lie on opposite sides of critical depth. The logarithmic axes keep both roots visible when their magnitudes differ greatly.