Lahar Volume Crater Lake Breach
Balance released crater-lake water, initial water loss and dry sediment grains into initial lahar volume; pores are not double counted and downstream entrainment/inundation are not predicted.
Description
A newly released lahar mixture contains water and sediment grains.
A newly released lahar mixture contains water and sediment grains. Adding grain volume avoids counting sediment pore water twice.
Balance released crater-lake water, initial water loss and dry sediment grains into initial lahar volume; pores are not double counted and downstream entrainment/inundation are not predicted.
When to use Lahar Volume Crater Lake Breach
Use this tool to balance released crater-lake water, initial water loss and dry sediment grains into initial lahar volume; pores are not double counted and downstream entrainment/inundation are not predicted.
Gather the relevant observations and fitted model parameters. Use the stated units and time basis; keep paired observations aligned.
How to use Lahar Volume Crater Lake Breach and understand its results
- Gather the relevant observations and fitted model parameters. Use the stated units and time basis; keep paired observations aligned.
- Enter craterLakeVolumeM3, releasedWaterFraction, initialWaterLossFraction, entrainedDrySedimentMassKg, grainDensityKgPerM3 using the field table and calculation rules, then run the tool.
- Read remainingWaterVolumeM3, entrainedSolidVolumeM3, initialMixtureVolumeM3, solidVolumeFraction. 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 |
|---|---|---|---|
| craterLakeVolumeM3 | Crater lake volume m3 | number | Required |
| releasedWaterFraction | Released water fraction | number | Required |
| initialWaterLossFraction | Initial water loss fraction | number | Required |
| entrainedDrySedimentMassKg | Entrained dry sediment mass kg | number | Required |
| grainDensityKgPerM3 | Grain density kg per m3 | number | Required |
Use positive grain density, nonnegative lake volume and sediment mass, and release/loss fractions in [0,1]. Require positive resulting mixture volume and return water, solids and solid volume fraction.1
mixture volume = lake volume × release × (1 − water loss) + dry sediment mass/grain density Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| remainingWaterVolumeM3 | Remaining water volume m3 | number |
| entrainedSolidVolumeM3 | Entrained solid volume m3 | number |
| initialMixtureVolumeM3 | Initial mixture volume m3 | number |
| solidVolumeFraction | Solid volume fraction | number |
{
"input": {
"craterLakeVolumeM3": 100,
"releasedWaterFraction": 0.5,
"initialWaterLossFraction": 0.2,
"entrainedDrySedimentMassKg": 10000,
"grainDensityKgPerM3": 2000
},
"output": {
"remainingWaterVolumeM3": 40,
"entrainedSolidVolumeM3": 5,
"initialMixtureVolumeM3": 45,
"solidVolumeFraction": 0.1111111111111111
}
}Limitations and assumptions
Only the initial mixture budget is evaluated; downstream entrainment and inundation are excluded.
Numbers and computed results must be finite; overflow produces an error. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors.
Alternative or Complementary methods
Use Lahar Inundation Distance Volume Scaling: Evaluate caller empirical lahar area-volume bounds and a rectangular mean-width length proxy; no terrain routing, geodesy, inundation map or validated warning distance. For a complementary task, use Hyperconcentrated Flow Density Range Checker: Screen density-derived solid volume concentrations against a caller hyperconcentrated-flow band; existing mining tools infer pulp mass fraction, not this flow-regime volume policy, and gas-rich mixtures are unsupported.
References
-
Lahar Volume Crater Lake Breach — tool.io
Similar or alternative tools
- Lahar Inundation Distance Volume Scaling
Evaluate caller empirical lahar area-volume bounds and a rectangular mean-width length proxy; no terrain routing, geodesy, inundation map or validated warning distance.
- Hyperconcentrated Flow Density Range Checker
Screen density-derived solid volume concentrations against a caller hyperconcentrated-flow band; existing mining tools infer pulp mass fraction, not this flow-regime volume policy, and gas-rich mixtures are unsupported.