Plankton Settling Volume Liter Calculator
Normalize actual blank-corrected plankton settled volume to original water sample; negative blank estimates retained as nondetection evidence, not biomass or counted-cell density.
Description
Settled plankton volume is an operational measurement.
Settled plankton volume is an operational measurement. Blank subtraction can produce negative estimates that should remain visible.1
Enter nonnegative sample/blank volumes and positive original sample liters. Return signed corrected volume and normalized value.
When to use Plankton Settling Volume Liter Calculator
Use Plankton Settling Volume Liter Calculator when you need to evaluate the supplied records under the calculation and evidence rules below. Negative corrections are retained as evidence; no biomass, taxon or cell-density conversion is supplied.
Prepare the observed lake or sample measurements and explicit calibration, reference values or thresholds requested. Keep depth coverage, units, dates and sampling conditions consistent.
How to use Plankton Settling Volume Liter Calculator and understand its results
- Prepare the observed lake or sample measurements and explicit calibration, reference values or thresholds requested. Keep depth coverage, units, dates and sampling conditions consistent.
- Enter planktonSettledVolumeMl, blankSettledVolumeMl, originalWaterSampleLiters using the field table and calculation rules, then run the tool.
- Read signedBlankCorrectedSettledVolumeMl, observedSettledPlanktonMlPerLiter. The explanation below defines the units, signs, ordering and any flags or placeholder values.
- If the tool reports an input issue, correct the values and run it again. Apply the stated assumptions when interpreting a successfully returned result.
| Input field | Meaning | Value type; see rules below | Requirement |
|---|---|---|---|
| planktonSettledVolumeMl | Plankton settled volume ml | number | Required |
| blankSettledVolumeMl | Blank settled volume ml | number | Required |
| originalWaterSampleLiters | Original water sample liters | number | Required |
Enter nonnegative sample/blank volumes and positive original sample liters. Return signed corrected volume and normalized value.
netMl=sampleSettled−blankSettled; mlPerLiter=netMl/originalLiters Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| signedBlankCorrectedSettledVolumeMl | Signed blank corrected settled volume ml | number |
| observedSettledPlanktonMlPerLiter | Observed settled plankton ml per liter | number |
{
"input": {
"planktonSettledVolumeMl": 2,
"blankSettledVolumeMl": 0.5,
"originalWaterSampleLiters": 3
},
"output": {
"signedBlankCorrectedSettledVolumeMl": 1.5,
"observedSettledPlanktonMlPerLiter": 0.5
}
}Limitations and assumptions
Negative corrections are retained as evidence; no biomass, taxon or cell-density conversion is supplied.
Numeric inputs, where present, must be finite. Follow the calculation-specific rules for overflow, underflow and exceptional cases. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors.
Alternative or Complementary methods
Use Sedgwick Rafter Cell Density Calculator: Counting-chamber density depends on the volume actually examined. Unequal field areas require volume pooling rather than an assumed full chamber. For a complementary task, use Benthic Macroinvertebrate Biomass Area Calculator: Pooled benthic biomass should weight unequal sample areas through total mass divided by total area. Blank corrections can be negative.
References
Similar or alternative tools
- Sedgwick Rafter Cell Density Calculator
Counting-chamber density depends on the volume actually examined. Unequal field areas require volume pooling rather than an assumed full chamber.
- Benthic Macroinvertebrate Biomass Area Calculator
Pooled benthic biomass should weight unequal sample areas through total mass divided by total area. Blank corrections can be negative.