Description
Return totalOutflow = eventFlow+infiltrationFlow and nominalResidence = storageVolume/totalOutflow.
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 totalOutflow = eventFlow+infiltrationFlow and nominalResidence = storageVolume/totalOutflow.
When to use this tool
Use Bioswale Hydraulic Retention One Event when checking one supplied hydraulic loading, clearance, volume or travel-time term.
How to use the tool and how it works
- Enter storageVolume, eventFlow, infiltrationFlow. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read totalOutflow, nominalResidence. Use the output convention below.
Require nonnegative storageVolume, eventFlow and infiltrationFlow and positive eventFlow+infiltrationFlow. Return totalOutflow = eventFlow+infiltrationFlow and nominalResidence = storageVolume/totalOutflow.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| storageVolume | Storage Volume | Required. Finite number; minimum 0. |
| eventFlow | Event Flow | Required. Finite number; minimum 0. |
| infiltrationFlow | Infiltration Flow | Required. Finite number; minimum 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| totalOutflow | Total Outflow | Required. Finite number. |
| nominalResidence | Nominal Residence | Required. Finite number. |
{
"input": {
"storageVolume": 100,
"eventFlow": 5,
"infiltrationFlow": 5
},
"output": {
"totalOutflow": 10,
"nominalResidence": 10
}
}Limitations and assumptions
- Both flows are interpreted as outlets from storage under this convention, including infiltration. This nominal steady ratio does not route an event hydrograph, model mixing or establish pollutant treatment performance.
- 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
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Distinguish empty-bed contact time V/Q from nominal interstitial void-volume residence time.