Description
Return bypassMass = bypassFlow*untreatedConcentration*duration.
A pollutant load combines concentration with a compatible flow, volume or activity factor. A load rate has amount-per-time units, whereas an integrated load also includes duration; concentration differences alone do not describe removal when flows differ.
Return bypassMass = bypassFlow*untreatedConcentration*duration.
When to use this tool
Use Treatment Bypass Mass Term when checking one supplied emission, transport or treatment mass-balance contribution.
How to use the tool and how it works
- Enter bypassFlow, untreatedConcentration, duration. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read bypassMass. Use the output convention below.
Require nonnegative bypassFlow, untreatedConcentration and duration. Return bypassMass = bypassFlow*untreatedConcentration*duration. Choose flow, concentration and time units so the product gives the intended mass; for example m³/hour, kg/m³ and hours give kg.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| bypassFlow | Bypass Flow | Required. Finite number; minimum 0. |
| untreatedConcentration | Untreated Concentration | Required. Finite number; minimum 0. |
| duration | Elapsed duration on the flow or rate time basis used in the formula. | Required. Finite number; minimum 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| bypassMass | Bypass Mass | Required. Finite number. |
{
"input": {
"bypassFlow": 2,
"untreatedConcentration": 3,
"duration": 4
},
"output": {
"bypassMass": 24
}
}Limitations and assumptions
- This assumes constant untreated concentration and bypass flow over the duration. It neither detects bypass events nor establishes treatment efficiency, discharge permission or a complete pollutant inventory.
- 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
Integrate changing measurements over time and reconcile storage and reactions when a constant-condition product is insufficient.
References
Similar or alternative tools
- Groundwater Pump Extracted Contaminant Mass
Return pumpedVolume = flow*duration, extractedMass = pumpedVolume*concentration and capturedMass = extractedMass*capturedFraction.
- Water Reuse Blending Concentration Term Tool
Calculate conservative two-volume water blending concentration with additive volumes and compatible mass-concentration units.