Passage Hydraulic Radius Calculator
Actual wetted hydraulic radiusA/P, dry ceiling excluded from perimeter; not whole irregular passage perimeter by default. Actual independently matched quantities/units required; not infer causal effect, clinical guidance or safe design.
Description
Hydraulic radius divides flow cross-sectional area by wetted perimeter.
Hydraulic radius divides flow cross-sectional area by wetted perimeter.1
A dry ceiling is not automatically part of that wetted boundary.
When to use Passage Hydraulic Radius Calculator
Use this tool to calculate measured hydraulic radius from the independently matched numerator and denominator. Establish the survey or observation scope, reference frame, units and independently applicable calibration or qualified plan.
How to use Passage Hydraulic Radius Calculator and understand its results
- Establish the survey or observation scope, reference frame, units and independently applicable calibration or qualified plan.
- Enter actualFlowCrossSectionSquareMeters, actualWettedBoundaryPerimeterMeters, using the field meanings and rules below, then run the tool.
- Read result.observedRatio as measured hydraulic radius in metres. Check the observation scope and assumptions before using the result.
- 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 |
|---|---|---|---|
| actualFlowCrossSectionSquareMeters | Actual flow cross section square meters | number | Required |
| actualWettedBoundaryPerimeterMeters | Actual wetted boundary perimeter meters | number | Required |
Require a finite nonnegative actual flow cross section square meters and a strictly positive actual wetted boundary perimeter meters. Divide the first by the second to obtain measured hydraulic radius, expressed as metres. Use compatible observations on the declared basis; no unit conversion or parameter selection is performed. The numerical ratio is not clamped to one.
measured_hydraulic_radius=flowAreaM2/wettedPerimeterMeters 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.observedRatio | Measured hydraulic radius, expressed as metres. | number |
{
"input": {
"actualFlowCrossSectionSquareMeters": 2,
"actualWettedBoundaryPerimeterMeters": 4
},
"output": {
"result": {
"observedRatio": 0.5
}
}
}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 Cave Volume from Cross Sections Integrator: Cross-sectional areas measured along a passage describe sampled geometry. For a complementary comparison, use Rimstone Dam Pool Volume Terraced Calculator: Terraced pool volume relates each plan area to its independently measured area-mean water depth.
References
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Passage Hydraulic Radius Calculator — tool.io
Similar or alternative tools
- Cave Volume from Cross Sections Integrator
Cross-sectional areas measured along a passage describe sampled geometry.
- Rimstone Dam Pool Volume Terraced Calculator
Terraced pool volume relates each plan area to its independently measured area-mean water depth.