Surge Cycle Period Reservoir
Estimate recharge/depletion surge-cycle timing from an explicit reservoir mass swing and fixed phase fluxes; thermal/hydraulic switching and actual surge occurrence are not predicted.
Description
An ideal surge reservoir accumulates mass during a quiet phase and loses it during an active phase.
An ideal surge reservoir accumulates mass during a quiet phase and loses it during an active phase. The mass swing divided by each net phase flux gives a cycle timescale.1
Estimate recharge/depletion surge-cycle timing from an explicit reservoir mass swing and fixed phase fluxes; thermal/hydraulic switching and actual surge occurrence are not predicted.
When to use Surge Cycle Period Reservoir
Use this for the following task: Estimate recharge/depletion surge-cycle timing from an explicit reservoir mass swing and fixed phase fluxes; thermal/hydraulic switching and actual surge occurrence are not predicted.
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 Surge Cycle Period Reservoir 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 reservoirSwingKg, quietInflowKgPerYear, quietOutflowKgPerYear, activeInflowKgPerYear, activeOutflowKgPerYear using the field table, then run the tool.
- Read rechargeYears, activeDepletionYears, idealCycleYears. 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 |
|---|---|---|---|
| reservoirSwingKg | Reservoir swing kg | number | Required |
| quietInflowKgPerYear | Quiet inflow kg per year | number | Required |
| quietOutflowKgPerYear | Quiet outflow kg per year | number | Required |
| activeInflowKgPerYear | Active inflow kg per year | number | Required |
| activeOutflowKgPerYear | Active outflow kg per year | number | Required |
Require a positive reservoir swing, nonnegative gross fluxes and positive net recharge/depletion. Add the two durations for the ideal cycle.2
recharge = ΔM/(quiet in − out); depletion = ΔM/(active out − in) This summarizes the declared operation. Units, indexing, inclusivity and exceptional cases are explained in the surrounding text.
| Output field | Meaning | Value type |
|---|---|---|
| rechargeYears | Recharge years | number |
| activeDepletionYears | Active depletion years | number |
| idealCycleYears | Ideal cycle years | number |
{
"input": {
"reservoirSwingKg": 100,
"quietInflowKgPerYear": 20,
"quietOutflowKgPerYear": 10,
"activeInflowKgPerYear": 20,
"activeOutflowKgPerYear": 70
},
"output": {
"rechargeYears": 10,
"activeDepletionYears": 2,
"idealCycleYears": 12
}
}Limitations and assumptions
This does not predict actual surge initiation or thermal/hydraulic switching; fixed phase fluxes are assumptions.
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 Mass Turnover Time for this operation: Distinguish inventory/accumulation and inventory/loss turnover under supplied mass fluxes; neither is the dynamical terminus response time. For a complementary task, use Glacier Response Time Johannesson for this operation: Use Johannesson thickness/terminus-ablation response time with a linear exponential length-anomaly relaxation; no geometry-dependent higher-order response is inferred.
Further background: Glacier accumulation, ablation and mass balance.
References
Similar or alternative tools
- Mass Turnover Time
Distinguish inventory/accumulation and inventory/loss turnover under supplied mass fluxes; neither is the dynamical terminus response time.
- Glacier Response Time Johannesson
Use Johannesson thickness/terminus-ablation response time with a linear exponential length-anomaly relaxation; no geometry-dependent higher-order response is inferred.