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Open Channel Flow (Manning)
Discharge and velocity in rectangular, trapezoidal channels and pipes flowing full.
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About this test
Enter the section, roughness and slope.
How it's calculated
- Q = (1/n)·A·R^⅔·S^½
Results are calculated from the values you enter using standard formulas. Download the PDF to keep a record. For certified testing, design or construction, talk to our engineers.
Cite this tool
Kataria Engineering & Consultancy Services (2026). Open Channel Flow (Manning) [online calculator]. https://katariaengineering.com/tools/manning-open-channel-flow.html
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