Anoxic Phosphorus Release Checker
Screen actual sediment-interface low-oxygen and caller labile-P evidence jointly; candidates are not measured release, universal redox mechanism, inferred missing oxygen or remediation advice.
Description
Low oxygen and labile phosphorus are separate sediment-interface observations.
Low oxygen and labile phosphorus are separate sediment-interface observations. Their conjunction can identify candidates while preserving missing oxygen evidence.1
Enter aligned nonempty nonnegative oxygen values, binary oxygen/labile evidence and nonnegative ceiling. Return joint candidate and oxygen-unknown zero-based indices.
When to use Anoxic Phosphorus Release Checker
Use Anoxic Phosphorus Release Checker when you need to evaluate the supplied records under the calculation and evidence rules below. Placeholder oxygen does not establish a candidate. No measured release rate, universal redox mechanism or remediation advice is provided.
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 Anoxic Phosphorus Release Checker 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 observedSedimentInterfaceOxygenMgLiter, oxygenEvidenceFlags, labilePhosphorusEvidenceFlags, callerAnoxiaOxygenCeilingMgLiter using the field table and calculation rules, then run the tool.
- Read callerAnoxicReleaseCandidateIndices, oxygenEvidenceUnknownIndices. 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 |
|---|---|---|---|
| observedSedimentInterfaceOxygenMgLiter | Observed sediment interface oxygen mg liter | list of number | Required |
| oxygenEvidenceFlags | Oxygen evidence flags | list of number | Required |
| labilePhosphorusEvidenceFlags | Labile phosphorus evidence flags | list of number | Required |
| callerAnoxiaOxygenCeilingMgLiter | Caller anoxia oxygen ceiling mg liter | number | Required |
Enter aligned nonempty nonnegative oxygen values, binary oxygen/labile evidence and nonnegative ceiling. Return joint candidate and oxygen-unknown zero-based indices.
candidate=oxygenKnown AND labileEvidence AND oxygen≤callerCeiling Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| callerAnoxicReleaseCandidateIndices | Caller anoxic release candidate indices | list of number |
| oxygenEvidenceUnknownIndices | Oxygen evidence unknown indices | list of number |
{
"input": {
"observedSedimentInterfaceOxygenMgLiter": [
0,
1,
0
],
"oxygenEvidenceFlags": [
1,
1,
0
],
"labilePhosphorusEvidenceFlags": [
1,
0,
1
],
"callerAnoxiaOxygenCeilingMgLiter": 0.5
},
"output": {
"callerAnoxicReleaseCandidateIndices": [
0
],
"oxygenEvidenceUnknownIndices": [
2
]
}
}Limitations and assumptions
Placeholder oxygen does not establish a candidate. No measured release rate, universal redox mechanism or remediation advice is provided.
Numeric inputs, where present, must be finite. Follow the calculation-specific rules for overflow, underflow and exceptional cases. Numeric lists are limited to 10,000 entries; string lists to 128 strings of at most 128 characters each. The rules above may impose smaller limits. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors.
Alternative or Complementary methods
Use Hypolimnetic Oxygen Demand Rate Calculator: Oxygen demand can be inferred from inventory change after subtracting independently measured advection. A negative result indicates net nonadvective replenishment. For a complementary task, use Load Reduction Required Percent Calculator: Load reduction planning needs a source ledger and explicit reducible fractions. The total target does not itself establish achievable reductions.
References
-
Anoxic Phosphorus Release Checker — tool.io
Similar or alternative tools
- Hypolimnetic Oxygen Demand Rate Calculator
Oxygen demand can be inferred from inventory change after subtracting independently measured advection. A negative result indicates net nonadvective replenishment.
- Load Reduction Required Percent Calculator
Load reduction planning needs a source ledger and explicit reducible fractions. The total target does not itself establish achievable reductions.