Quick Answer
The calculate flow velocity in an open channel using manning equation computes v_flow from the input values you provide.
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Explore ToolFusionResult Interpretation
Calculate flow velocity in an open channel using Manning equation computes v_flow in m/s using the defined engineering formula and the input values provided. v_flow is expressed in m/s. No universal acceptance threshold is defined by this calculator.
Worked Example
default_test
Given:
- r_hyd = 0.5
- s_slope = 0.001
- n_manning = 0.013
Expected Result:
- v_flow = 1.5323923806379
Engineering Interpretation:
Under the given input conditions, the calculated result is: v_flow = 1.5323923806379 m/s.
The actual numerical result is computed by the Runtime engine using the persisted tool definition. The values shown here come from deterministically validated test cases.
Formula / Method
v_flow = (1 / n_manning) * pow(r_hyd, 0.66666666666667) * pow(s_slope, 0.5)v_flow.
Variables
| Symbol | Label | Role | Description |
|---|---|---|---|
| n_manning | n_manning | INPUT | n_manning |
| r_hyd | r_hyd | INPUT | r_hyd |
| s_slope | s_slope | INPUT | s_slope |
| v_flow | v_flow | OUTPUT | v_flow |
Calculation Steps
- Enter the n_manning in 1.
- Enter the r_hyd in m.
- Enter the s_slope in 1.
- Read the v_flow (m/s) from the results.
Frequently Asked Questions
What does this calculator calculate?
The Calculate flow velocity in an open channel using Manning equation estimates v_flow based on the input parameters you provide
Why is r_hyd important in this calculation?
r_hyd is used directly in the calculation of v_flow. Its effect on the result depends on the complete formula and the values of the other inputs.. When you enter r_hyd in m, the calculator uses it in the engineering formula to compute the output
How should I interpret the result v_flow?
The calculator outputs v_flow in m/s. To convert to km/h, multiply the result by 3.6. The result is computed directly from the input values using the defined engineering formula
What units should I use for the inputs?
Enter each value in the units shown next to the input field: r_hyd (m). Make sure all inputs use the specified units for consistent results
What assumptions does this calculator use?
This calculator uses automatically validated engineering formulas. Results are approximate and should be validated against site-specific conditions, applicable codes, and professional engineering judgment
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