Description
Average nonnegative leftDepth and rightDepth, multiply by nonnegative width for panel area, then multiply by signed meanVelocity for discharge.
Flow calculations relate volume, time, cross-section, velocity, and supplied model parameters. A local ratio or contribution does not by itself solve a complete hydraulic system.
Average nonnegative leftDepth and rightDepth, multiply by nonnegative width for panel area, then multiply by signed meanVelocity for discharge.
When to use this tool
Use Stream Cross Section Panel Area when you need one explicit flow component with coherent units and references.
How to use the tool and how it works
- Enter leftDepth, rightDepth, width, meanVelocity. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read area, discharge. Use the output convention below.
Average nonnegative leftDepth and rightDepth, multiply by nonnegative width for panel area, then multiply by signed meanVelocity for discharge.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| leftDepth | Left Depth | Required. Finite number; minimum 0. |
| rightDepth | Right Depth | Required. Finite number; minimum 0. |
| width | Interval or dimension span under the stated unit and endpoint convention. | Required. Finite number; minimum 0. |
| meanVelocity | Mean Velocity | Required. Finite number. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| area | Area on the common unit basis stated above. | Required. Finite number. |
| discharge | Discharge | Required. Finite number. |
{
"input": {
"leftDepth": 1,
"rightDepth": 2,
"width": 4,
"meanVelocity": 0.5
},
"output": {
"area": 6,
"discharge": 3
}
}Limitations and assumptions
- Use coherent length and velocity units; this is one trapezoidal panel, without full-channel integration, velocity-profile correction, or survey uncertainty.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Use surveyed geometry, appropriate calibration, and a complete hydraulic model for operational or design decisions.
References
Similar or alternative tools
- Gauging Vertical Midsection Area Term
Multiply half their separation by depth for areaContribution.
- Hydrograph Segment Volume Trapezoid
Average startFlowM3PerSecond and endFlowM3PerSecond and multiply by nonnegative durationSeconds for volumeM3.