Description
Compare supplied storage-water mass with a declared mass basis, not a structural load rating.
A farm or garden budget depends on a common area, quantity, observation period, and system boundary. Recovery, exclusions, overlap, and allocation change how a share is calculated. Supplied accounting or geometry terms remain separate from measured crop performance and verified environmental outcomes.
Compare supplied storage-water mass with a declared mass basis, not a structural load rating.
When to use this tool
Use Rooftop Water Storage Mass Share when you need a clearly bounded area, material, resource, energy, or allocation term for supplied garden or farm records.
How to use the tool and how it works
- Enter waterVolume, density, totalSupportedMass. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read waterMass, share. Use the output convention below.
Calculate waterMass=waterVolume*density and share=waterMass/totalSupportedMass. Require nonnegative volume and positive density and total supported mass.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| waterVolume | Water Volume | Required. Finite number; minimum 0. |
| density | Density | Required. Finite number; strictly above 0. |
| totalSupportedMass | Supplied mass denominator, not a verified structural load rating. | Required. Finite number; strictly above 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| waterMass | Water Mass | Required. Finite number. |
| share | Dimensionless fraction using the stated denominator; not a percentage numeral. | Required. Finite number. |
{
"input": {
"waterVolume": 2,
"density": 1000,
"totalSupportedMass": 4000
},
"output": {
"waterMass": 2000,
"share": 0.5
}
}Limitations and assumptions
- Density must use the supplied volume and mass units. Share may exceed one; totalSupportedMass is an accounting base, not a verified roof load rating or a structural safety limit.
- The field tables state structural bounds; the mechanics also specify cross-field constraints. Malformed inputs and unsupported domains cause errors. A successful false flag, empty branch value, or zero placeholder has the meaning stated above and is distinct from an input error.
- 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. Signed zero is exported as zero.
Alternative or Complementary methods
Verify the system boundary, units, and source records before combining this term into a resource or environmental report. Physical design and crop-performance questions require appropriate measurements and a broader model.
References
Similar or alternative tools
- Community Garden Water Bill Meter Share
Allocate bill*plotMeter/sum(allMeters)+fixedCharge/equalShares.
- Garden Water Credit Share
Supplied water billing/allocation credit arithmetic without inferring water quality or irrigation need.