Description
Subtract bedElevation and nonnegative settlement from crestElevation for effectiveHeight.
A site clearance is a signed difference between available space and an object or allowance. A supplied setback and assumed future envelope are separate from actual legal or environmental requirements.
Subtract bedElevation and nonnegative settlement from crestElevation for effectiveHeight.
When to use this tool
Use Swale Check Dam Height Offset when you need one explicit landscape clearance margin.
How to use the tool and how it works
- Enter crestElevation, bedElevation, settlement. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read effectiveHeight. Use the output convention below.
Subtract bedElevation and nonnegative settlement from crestElevation for effectiveHeight.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| crestElevation | Crest Elevation | Required. Finite number. |
| bedElevation | Bed Elevation | Required. Finite number. |
| settlement | Settlement | Required. Finite number; minimum 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| effectiveHeight | Effective Height | Required. Finite number. |
{
"input": {
"crestElevation": 102,
"bedElevation": 100,
"settlement": 0.2
},
"output": {
"effectiveHeight": 1.8
}
}Limitations and assumptions
- Elevations must share a datum and length unit; this term does not determine safe dam height or drainage performance.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Verify current measurements, future growth, survey datums, and applicable design requirements for the site.
References
Similar or alternative tools
- Canopy Projection Setback Gap
Subtract canopyRadius from centerDistance for canopyEdgeDistance and subtract requiredSetback for margin.
- Landscape Contour Spot Height Interpolation
Interpolate lowHeight to highHeight by distanceFromLow / positive contourDistance, requiring the distance within that span.