Sinkhole Catchment Area Runoff Capture Calculator
Simple actual catchment×event rain×independently validated runoff fraction captured volume. Storage/overflow/routing and recharge independently assessed; not flood-safety or total annual catchment.
Description
Event runoff volume combines catchment area, rainfall depth and an independently applicable runoff fraction.
Event runoff volume combines catchment area, rainfall depth and an independently applicable runoff fraction.1
Storage, overflow and routing remain separate from that simple volume balance.
When to use Sinkhole Catchment Area Runoff Capture Calculator
Use this tool to obtain conditionalEventRunoffCapturedCubicMeters from the supplied records using the stated calculation. Establish the survey or observation scope, reference frame, units and independently applicable calibration or qualified plan.
How to use Sinkhole Catchment Area Runoff Capture Calculator and understand its results
- Establish the survey or observation scope, reference frame, units and independently applicable calibration or qualified plan.
- Enter actualCatchmentAreaSquareMeters, actualEventRainfallMeters, callerIndependentRunoffFraction, using the field meanings and rules below, then run the tool.
- Read result.conditionalEventRunoffCapturedCubicMeters. Use the units and sign conventions below, and review any unknown records separately.
- Correct any reported input issue and run again. Before using a successful result, check the stated units, signs, reference scope and observation coverage.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| actualCatchmentAreaSquareMeters | Actual catchment area square meters | number | Required |
| actualEventRainfallMeters | Actual event rainfall meters | number | Required |
| callerIndependentRunoffFraction | Caller independent runoff fraction | number | Required |
Require nonnegative catchment area in square metres and rainfall depth in metres, plus a runoff fraction in [0,1]. Multiply all three for the conditional event volume. No routing, storage or overflow model is applied.
capturedRunoffM3=areaM2×rainfallM×runoffFraction Use the matching field units and the exact boundary, ordering and reference rules above.
| Output field | Meaning | Value type |
|---|---|---|
| result | Qualified observed calculation or explicit reference | object |
| result.conditionalEventRunoffCapturedCubicMeters | Conditional Event Runoff Captured Cubic Meters | number |
{
"input": {
"actualCatchmentAreaSquareMeters": 10,
"actualEventRainfallMeters": 0.2,
"callerIndependentRunoffFraction": 0.5
},
"output": {
"result": {
"conditionalEventRunoffCapturedCubicMeters": 1
}
}
}Limitations and assumptions
The actual observation coverage, calibration and qualified plan determine applicability. A numerical result does not establish survey accuracy, route suitability, atmosphere conditions or equipment adequacy beyond the declared comparison.
Missing required fields, unknown fields, wrong types and violated rules return input issues. Numeric values and outputs must be finite. Extremely large composite outputs are rejected.
Alternative or Complementary methods
For a related step, use Recharge Area Extent Estimate Calculator: A steady water balance relates annual spring discharge to effective recharge depth. For a complementary comparison, use Epikarst Storage Estimate Calculator: Epikarst drainable storage can be modeled from footprint, effective thickness and drainable porosity.
References
Similar or alternative tools
- Recharge Area Extent Estimate Calculator
A steady water balance relates annual spring discharge to effective recharge depth.
- Epikarst Storage Estimate Calculator
Epikarst drainable storage can be modeled from footprint, effective thickness and drainable porosity.