Description
Return travelTime = pipeLength/flowVelocity, settlingTime = settlingDepth/settlingVelocity and margin = travelTime-settlingTime.
Nominal hydraulic ratios connect flow to area, length, volume or travel time. These local terms depend on active geometry and steady conditions; they do not describe a full distribution of velocities, residence times or treatment performance.
Return travelTime = pipeLength/flowVelocity, settlingTime = settlingDepth/settlingVelocity and margin = travelTime-settlingTime.
When to use this tool
Use Pipe Sediment Settling Travel Gap when checking one supplied hydraulic loading, clearance, volume or travel-time term.
How to use the tool and how it works
- Enter pipeLength, flowVelocity, settlingDepth, settlingVelocity. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read travelTime, settlingTime, margin. Use the output convention below.
Require nonnegative pipeLength and settlingDepth and positive flowVelocity and settlingVelocity. Return travelTime = pipeLength/flowVelocity, settlingTime = settlingDepth/settlingVelocity and margin = travelTime-settlingTime. Use matching length and velocity time units.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| pipeLength | Pipe Length | Required. Finite number; minimum 0. |
| flowVelocity | Flow Velocity | Required. Finite number; strictly above 0. |
| settlingDepth | Settling Depth | Required. Finite number; minimum 0. |
| settlingVelocity | Settling Velocity | Required. Finite number; strictly above 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| travelTime | Travel Time | Required. Finite number. |
| settlingTime | Settling Time | Required. Finite number. |
| margin | Margin | Required. Finite number. |
{
"input": {
"pipeLength": 100,
"flowVelocity": 2,
"settlingDepth": 1,
"settlingVelocity": 0.01
},
"output": {
"travelTime": 50,
"settlingTime": 100,
"margin": -50
}
}Limitations and assumptions
- A positive margin means nominal travel time exceeds nominal settling time. This ideal comparison omits turbulence, particle distribution, resuspension and geometry; it does not demonstrate sediment capture or blockage.
- 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 a complete hydraulic and treatment model when changing flows, turbulence, media behavior or safety margins matter.
References
Similar or alternative tools
- Bioswale Hydraulic Retention One Event
Return totalOutflow = eventFlow+infiltrationFlow and nominalResidence = storageVolume/totalOutflow.
- Treatment Load Baseline Gap Tool
Compare measured load balance with an explicit baseline removal fraction, permitting net load gains.