Description
Calculate reused water as a fraction of total farm water.
Farm sustainability accounting needs explicit resource units, system boundaries, reference periods and source versions. A reused-water or renewable-energy share uses a declared total, while a soil carbon stock combines depth, bulk density and carbon mass fraction. Local quantities do not by themselves establish environmental benefit, additionality, certification or comparable life-cycle impacts.
Calculate reused water as a fraction of total farm water.
When to use this tool
Use Farm Water Reused Fraction when you already have reusedWaterVolume, totalWaterVolume and need to calculate reused water as a fraction of total farm water.
How to use the tool and how it works
- Enter reusedWaterVolume, totalWaterVolume. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read fraction, remainder. Use the output convention below.
Require total water>0 and reused amount within total; return reused/total and total-reused.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| reusedWaterVolume | Reused Water Volume | Required. Finite number; minimum 0. |
| totalWaterVolume | Total Water Volume | Required. Finite number; strictly above 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| fraction | Fraction | Required. Finite number. |
| remainder | Remainder | Required. Finite number. |
{
"input": {
"reusedWaterVolume": 30,
"totalWaterVolume": 120
},
"output": {
"fraction": 0.25,
"remainder": 90
}
}Limitations and assumptions
- The accounting basis is supplied; quality, double counting, water availability and suitability of reuse are not assessed.
- 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 a documented farm inventory with matched system boundaries and reference periods for broader sustainability analysis. For soil carbon, retain the original sampling depth, density, carbon assay and coarse-fragment basis rather than interpreting one layer product as a verified stock change.
References
Similar or alternative tools
- Farm Resource External Input Share
Calculate external resources as a fraction of total farm inputs.
- Farm Energy Renewable Share
Calculate renewable energy as a fraction of supplied farm energy.