Description
Return sum(area*transparency) and divide by totalArea.
Agroforestry geometry separates row widths, root-zone intervals, canopy projections and repeated-strip area bases. Optical shade, optical porosity and a clear machinery corridor are different quantities. Ideal dimensions and supplied overlaps can support bookkeeping without establishing light conditions, aerodynamic shelter or safe access.
Return sum(area*transparency) and divide by totalArea.
When to use this tool
Use Shelterbelt Porosity One Opening Weight when checking the stated ideal tree-row, shade, buffer or area convention.
How to use the tool and how it works
- Enter openingAreas, transparency, totalArea. Follow any array-alignment requirements below. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read weightedOpenArea, weightedPorosity. Use the output convention below.
Require aligned nonnegative opening areas and transparency fractions in [0,1], whose unweighted areas sum to no more than totalArea>0. Return sum(area*transparency) and divide by totalArea.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| openingAreas | Opening Areas | Required. Array of finite number; maximum items 256. |
| transparency | Transparency | Required. Array of finite number; maximum items 256. |
| totalArea | Total Area | Required. Finite number; strictly above 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| weightedOpenArea | Weighted Open Area | Required. Finite number. |
| weightedPorosity | Weighted Porosity | Required. Finite number. |
{
"input": {
"openingAreas": [
10,
20
],
"transparency": [
1,
0.5
],
"totalArea": 100
},
"output": {
"weightedOpenArea": 20,
"weightedPorosity": 0.2
}
}Limitations and assumptions
- Assumes the supplied openings are appropriately partitioned; optical porosity does not establish aerodynamic shelter 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
Use measured terrain and canopy geometry, appropriate light/flow models and qualified agricultural/engineering assessment for actual layouts and operations.
References
Similar or alternative tools
- Shelterbelt Optical Porosity Gap Fraction
Return gap/(gap+opaque); report excluded/(gap+opaque+excluded) separately.
- Alley Width Sun Angle Shadow Gap
Return height/tan(altitude) and max(0,alleyWidth-shadowLength).