Manning Equation Open Channel Flow Calculator

Calculate open channel flow velocity, discharge, and normal depth using Manning's equation for trapezoidal, rectangular, and circular channels.

2D stress state at a point. All stresses in MPa.

σx — Normal Stress X (MPa)
σy — Normal Stress Y (MPa)
τxy — Shear Stress (MPa)
⚙ Mechanical Note: Results are based on standard textbook formulas and ISO/AASHTO references. Always verify critical designs with applicable codes (ISO 898, AASHTO 1993, AISC, Eurocode 3) and a qualified engineer.
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How It Works

Calculate open channel flow velocity, discharge, and normal depth using Manning's equation for trapezoidal, rectangular, and circular channels

Each component has a specific meaning:

  • Manning's equation — The manning's equation recorded for the patient or scenario being assessed.

Note: Interpret the manning equation result against the clinical thresholds and context described above.

How to Use

Enter the Manning's equation for the patient or scenario you are assessing. Calculate open channel flow velocity, discharge, and normal depth using Manning's equation for trapezoidal, rectangular, and circular channels. Use the manning equation result to inform your clinical assessment.

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Frequently Asked Questions