Lava Flow Volume Effusion Duration

Integrate piecewise dense-magma discharge into DRE and separately expanded emplaced bulk lava volume; unlike survey-rate inference, flow is a supplied forward boundary condition.

Description

Dense-rock-equivalent volume excludes vesicles.

Dense-rock-equivalent volume excludes vesicles. Emplaced bulk lava occupies more volume when gas pores are present.

Integrate piecewise dense-magma discharge into DRE and separately expanded emplaced bulk lava volume; unlike survey-rate inference, flow is a supplied forward boundary condition.

When to use Lava Flow Volume Effusion Duration

Use this tool to integrate piecewise dense-magma discharge into DRE and separately expanded emplaced bulk lava volume; unlike survey-rate inference, flow is a supplied forward boundary condition.

Gather the relevant observations and fitted model parameters. Use the stated units and time basis; keep paired observations aligned.

How to use Lava Flow Volume Effusion Duration and understand its results

Gather the relevant observations and fitted model parameters. Use the stated units and time basis; keep paired observations aligned.
Enter intervalDurationsSeconds, denseMagmaDischargesM3PerSecond, emplacedVesicleFractions using the field table and calculation rules, then run the tool.
Read denseRockEquivalentVolumeM3, emplacedBulkLavaVolumeM3. 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
intervalDurationsSeconds	Interval durations seconds	list of number	Required
denseMagmaDischargesM3PerSecond	Dense magma discharges m3 per second	list of number	Required
emplacedVesicleFractions	Emplaced vesicle fractions	list of number	Required

Align nonnegative durations and dense discharges with vesicle fractions in [0,1). Sum interval volumes separately for DRE and expanded bulk lava.^[1]

Paired lists must be nonempty and have equal lengths.

DRE = Σ duration × dense discharge; bulk = Σ duration × dense discharge/(1 − vesicle fraction)

Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.

Output field	Meaning	Value type
denseRockEquivalentVolumeM3	Dense rock equivalent volume m3	number
emplacedBulkLavaVolumeM3	Emplaced bulk lava volume m3	number

json

{
  "input": {
    "intervalDurationsSeconds": [
      10,
      20
    ],
    "denseMagmaDischargesM3PerSecond": [
      2,
      3
    ],
    "emplacedVesicleFractions": [
      0,
      0.5
    ]
  },
  "output": {
    "denseRockEquivalentVolumeM3": 80,
    "emplacedBulkLavaVolumeM3": 140
  }
}

Limitations and assumptions

Discharge is a supplied forward boundary condition; emplacement losses and changing transport are excluded.

Numbers and computed results must be finite; overflow produces an error. Numeric lists are limited to 100,000 entries; the rules above may require smaller limits. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors.

Alternative or Complementary methods

Use Effusion Rate Average Cubic KM Day: Infer observed interval/whole-span bulk effusion and vesicle-corrected DRE rate from matched surveys; no generic arithmetic average of interval rates or volume loss during emplacement is assumed. For a complementary task, use DRE To Tephra Volume Conversion: Convert declared whole-deposit DRE to bulk tephra volume by mass conservation, splitting supplied juvenile/lithic mass share; packing, vesicles and interclast pores are already embodied in measured bulk density.

References

Lava Flow Volume Effusion Duration — tool.io

Similar or alternative tools

Effusion Rate Average Cubic KM Day
Infer observed interval/whole-span bulk effusion and vesicle-corrected DRE rate from matched surveys; no generic arithmetic average of interval rates or volume loss during emplacement is assumed.
DRE To Tephra Volume Conversion
Convert declared whole-deposit DRE to bulk tephra volume by mass conservation, splitting supplied juvenile/lithic mass share; packing, vesicles and interclast pores are already embodied in measured bulk density.