CO2 Tree Kill Zone Diameter Health Checker
Actual documented tree-condition area with coincident CO2-evidence gaps and equivalent circular diameter, no causal attribution/tree health diagnosis or CO2 danger threshold. Caller independently establishes units, regime, calibration and applicability; this does not establish design-code compliance, authenticity, operational safety, treatment efficacy or a validated forecast.
Description
A tree-condition survey can quantify affected area while recording whether coincident CO₂ measurements exist.
A tree-condition survey can quantify affected area while recording whether coincident CO₂ measurements exist.1
An equivalent circular diameter summarizes that area without implying that the mapped footprint is circular or that CO₂ caused the damage.
When to use CO2 Tree Kill Zone Diameter Health Checker
Use this tool when you need to reproduce the stated calculation from measured records or independently selected model inputs. Prepare matched observations and independently established site, specimen, units, datum, and calibration context.
How to use CO2 Tree Kill Zone Diameter Health Checker and understand its results
- Prepare matched observations and independently established site, specimen, units, datum, and calibration context.
- Enter observedTreePlotAreasM2, observedAffectedTreeFractions, knownTreeConditionFlags, callerCoincidentCo2MeasurementAvailableFlags, following the field table and rules below, then run the tool.
- Read knownAffectedTreeAreaM2, equivalentKnownAffectedDiameterM, unknownTreeConditionAreaM2, knownAffectedAreaWithoutCo2EvidenceM2. Use the output meanings below to interpret units, signs, flags, and any nested result fields.
- Correct reported input issues and run again. For a successful result, check the stated evidence coverage and assumptions before using it in your review.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| observedTreePlotAreasM2 | Observed tree plot areas m2 | list of number | Required |
| observedAffectedTreeFractions | Observed affected tree fractions | list of number | Required |
| knownTreeConditionFlags | Known tree condition flags | list of number | Required |
| callerCoincidentCo2MeasurementAvailableFlags | Caller coincident CO₂ measurement available flags | list of number | Required |
Use aligned positive plot areas in square metres, affected fractions from zero to one, and binary condition-known and CO₂-measurement flags. Sum affected area for known conditions, derive an equivalent circle diameter, and separately report unknown-condition area and known affected area lacking CO₂ evidence.
A=Σ(known_i×plotArea_i×affectedFraction_i); D=2√(A/π) Symbols follow the input and output meanings and the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| knownAffectedTreeAreaM2 | Known affected tree area m2 | number |
| equivalentKnownAffectedDiameterM | Equivalent known affected diameter m | number |
| unknownTreeConditionAreaM2 | Unknown tree condition area m2 | number |
| knownAffectedAreaWithoutCo2EvidenceM2 | Known affected area without CO₂ evidence m2 | number |
{
"input": {
"observedTreePlotAreasM2": [
10,
20
],
"observedAffectedTreeFractions": [
0.5,
0.25
],
"knownTreeConditionFlags": [
1,
0
],
"callerCoincidentCo2MeasurementAvailableFlags": [
1,
1
]
},
"output": {
"knownAffectedTreeAreaM2": 5,
"equivalentKnownAffectedDiameterM": 2.5231325220201604,
"unknownTreeConditionAreaM2": 20,
"knownAffectedAreaWithoutCo2EvidenceM2": 0
}
}Limitations and assumptions
Interpretation requires independently matched observations, units, site or specimen, and calibration. The calculation does not establish geological identity, operating safety, or an eruption forecast.
Missing required fields, unknown fields, wrong types, and violated calculation rules are input issues. Numeric values must be finite; nonfinite results are rejected. Evidence arrays must be dense, with no missing cells. Numeric observation lists allow at most 10,000 entries, subject to any smaller bounds stated above.
Alternative or Complementary methods
For a related review, use Hazard Zone Radius Population Exposure Calculator: Population exposure within a documented hazard zone requires a population distribution and mapped overlap. This calculator combines already established exposure fractions and records how much population remains unassessed. For a complementary step, use Dormancy Reactivation Risk Score Calculator: An unrest score is a weighted summary of evidence under a chosen scoring policy. Missing evidence has its own weight, so the known-evidence score and coverage should be read together.
References
Similar or alternative tools
- Hazard Zone Radius Population Exposure Calculator
Population exposure within a documented hazard zone requires a population distribution and mapped overlap. This calculator combines already established exposure fractions and records how much population remains unassessed.
- Dormancy Reactivation Risk Score Calculator
An unrest score is a weighted summary of evidence under a chosen scoring policy. Missing evidence has its own weight, so the known-evidence score and coverage should be read together.