Description
Calculate supplied particulate concentration by difference.
Aquatic measurements depend on depth datums, effective sampling area, layer weights and concentration definitions. Secchi pair averages differ from a full optical model, and particulate-by-difference values depend on comparable total/dissolved measurements. A nominal rectangular sampling volume does not establish actual filtered effort or detection.
Calculate supplied particulate concentration by difference.
When to use this tool
Use Nutrient Dissolved Particulate Difference when you already have totalConcentration, dissolvedConcentration and need to calculate supplied particulate concentration by difference.
How to use the tool and how it works
- Enter totalConcentration, dissolvedConcentration. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read particulateByDifference. Use the output convention below.
Return totalConcentration-dissolvedConcentration with signs preserved.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| totalConcentration | Total Concentration | Required. Finite number. |
| dissolvedConcentration | Dissolved Concentration | Required. Finite number. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| particulateByDifference | Particulate By Difference | Required. Finite number. |
{
"input": {
"totalConcentration": 1.2,
"dissolvedConcentration": 0.8
},
"output": {
"particulateByDifference": 0.3999999999999999
}
}Limitations and assumptions
- Comparable species, filtration definitions, units and sampling conditions are assumed. Negative discrepancies are retained; no sample, partitioning or measurement uncertainty is assessed.
- 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
Review original field and laboratory records with the complete survey or process model. Include calibration, temporal coverage, sampling efficiency and uncertainty when local rates, depth shifts or labels cannot establish the aquatic quantity of interest.
References
Similar or alternative tools
- Aquatic Suspended Particulate Mass Share
Calculate supplied particulate mass share within a sample.
- Water Column Layer Average
Calculate a supplied depth-weighted water-column mean.