Examples
Examples
Try the starting example
- Flow area (m²)
- 2
- Wetted perimeter (m)
- 4
- Energy slope (m/m)
- 0.001
- Manning roughness n
- 0.03
- Uniform-flow discharge (m³/s)
- 1.328073
- Mean velocity (m/s)
- 0.664037
- Hydraulic radius (m)
- 0.5
Try another scenario
- Flow area (m²)
- 2.2
- Wetted perimeter (m)
- 4
- Energy slope (m/m)
- 0.001
- Manning roughness n
- 0.03
- Uniform-flow discharge (m³/s)
- 1.556718
- Mean velocity (m/s)
- 0.707599
- Hydraulic radius (m)
- 0.55
Calculation method
Calculation method
Uniform-flow discharge (m³/s)
Q=A R^(2/3) sqrt(S)/n, R=A/P.
Mean velocity (m/s)
Q=A R^(2/3) sqrt(S)/n, R=A/P.
Hydraulic radius (m)
Q=A R^(2/3) sqrt(S)/n, R=A/P.
Symbols and units
- a
- Flow area (m²)
- b
- Wetted perimeter (m)
- c
- Energy slope (m/m)
- d
- Manning roughness n
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Assumptions & limits
Assumptions & limits
- SI uniform open-channel approximation; user supplies roughness and geometry. Supported limits: All required fields must be finite values of the exact declared type and within displayed bounds. Lists contain1–1000 finite numbers. JSON tables are numeric rectangular rows, at most100 rows and30 columns; individual tools have stricter shape/domain constraints. SI uniform open-channel approximation; user supplies roughness and geometry.
Are these inputs private?
These calculations run in your browser. A shared link contains the values you choose to share. Only questions submitted to the separate AI finder are sent to OpenAI.