GLOF Peak Discharge Envelope
Evaluate a caller empirical GLOF discharge coefficient envelope against normalized released volume; envelope is not a probability interval, dam-break hydrograph or safety assessment.
Description
Empirical glacial-lake outburst relations connect released water volume to a peak-discharge scale.
Empirical glacial-lake outburst relations connect released water volume to a peak-discharge scale. A coefficient envelope expresses supplied model bounds.
Evaluate a caller empirical GLOF discharge coefficient envelope against normalized released volume; envelope is not a probability interval, dam-break hydrograph or safety assessment.
When to use GLOF Peak Discharge Envelope
Use this for the following task: Evaluate a caller empirical GLOF discharge coefficient envelope against normalized released volume; envelope is not a probability interval, dam-break hydrograph or safety assessment.
Prepare the measurements and calibration parameters in the declared units. Keep vector entries aligned and choose a consistent spatial frame and time basis.
How to use GLOF Peak Discharge Envelope and understand its results
- Prepare the measurements and calibration parameters in the declared units. Keep vector entries aligned and choose a consistent spatial frame and time basis.
- Enter releasedLakeVolumeM3, referenceVolumeM3, coefficientBoundsM3PerSecond, volumeExponent using the field table, then run the tool.
- Read peakDischargeEnvelopeM3PerSecond. Interpret flags, units, ordering and placeholder values using the rules below.
- Review any reported issue or failed check, correct the supplied values when appropriate, and verify the result in its intended context.
| Input field | Meaning | Value type and bounds | Requirement |
|---|---|---|---|
| releasedLakeVolumeM3 | Released lake volume m3 | number | Required |
| referenceVolumeM3 | Reference volume m3 | number | Required |
| coefficientBoundsM3PerSecond | Coefficient bounds m3 per second | list of number; each entry: number | Required |
| volumeExponent | Volume exponent | number | Required |
Require a positive reference volume/exponent, nonnegative released volume and two ordered nonnegative coefficients. Evaluate both bounds using the same normalized volume.1
Qbounds = coefficientBounds (releasedVolume/referenceVolume)^exponent This summarizes the declared operation. Units, indexing, inclusivity and exceptional cases are explained in the surrounding text.
| Output field | Meaning | Value type |
|---|---|---|
| peakDischargeEnvelopeM3PerSecond | Peak discharge envelope m3 per second | list of number |
{
"input": {
"releasedLakeVolumeM3": 1000,
"referenceVolumeM3": 1000,
"coefficientBoundsM3PerSecond": [
10,
20
],
"volumeExponent": 0.5
},
"output": {
"peakDischargeEnvelopeM3PerSecond": [
10,
20
]
}
}Limitations and assumptions
The envelope is not a probability interval, dam-break hydrograph or safety assessment. Coefficients require site-appropriate calibration.
Constants and empirical coefficients are supplied rather than calibrated. Check units and observational applicability before interpreting the model. Malformed requests produce input errors. A successfully evaluated request can still contain false flags, empty result lists or a result outside the supplied threshold; those outcomes have the meanings stated above.
Alternative or Complementary methods
Choose Meltwater Storage Delay Glacier for this operation: Route piecewise-constant meltwater inflow through an exact linear storage reservoir and close interval volumes; no peak-lag inference or distributed drainage network. For a complementary task, use Subglacial Flow Direction Gradient for this operation: Compute isotropic downhill hydraulic-potential direction from bed/thickness gradients and pressure ratio; flat gradients have no defined direction and anisotropic transmissivity is excluded.
The implementation reference documents the exact calculation, supported input shapes and returned fields.
References
-
GLOF Peak Discharge Envelope — tool.io
Similar or alternative tools
- Meltwater Storage Delay Glacier
Route piecewise-constant meltwater inflow through an exact linear storage reservoir and close interval volumes; no peak-lag inference or distributed drainage network.
- Subglacial Flow Direction Gradient
Compute isotropic downhill hydraulic-potential direction from bed/thickness gradients and pressure ratio; flat gradients have no defined direction and anisotropic transmissivity is excluded.