Description
Return net withdrawal per combined harvest mass.
Aquaponic balances distinguish wet feed, dry matter, nutrient mass, concentration and water volume. A balance term can expose changes or losses without identifying nutrient availability, biological conversion or a suitable supplement dose. Each mass fraction must be attached to its stated material basis.
Return net withdrawal per combined harvest mass.
When to use this tool
Use Aquaponic Water Use Harvest Mass Basis when checking the stated aquaponic material, nutrient or measurement basis.
How to use the tool and how it works
- Enter withdrawal, recovered, fishHarvest, plantHarvest. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read netWater, waterPerCombinedHarvest. Use the output convention below.
Return net withdrawal per combined harvest mass. Require withdrawal >= recovered >= 0 and nonnegative harvests with positive combined mass; netWater = withdrawal-recovered, ratio divides by fish+plant harvest.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| withdrawal | Withdrawal | Required. Finite number. |
| recovered | Recovered | Required. Finite number; minimum 0. |
| fishHarvest | Fish Harvest | Required. Finite number; minimum 0. |
| plantHarvest | Plant Harvest | Required. Finite number; minimum 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| netWater | Net Water | Required. Finite number. |
| waterPerCombinedHarvest | Water Per Combined Harvest | Required. Finite number. |
{
"input": {
"withdrawal": 100,
"recovered": 20,
"fishHarvest": 10,
"plantHarvest": 30
},
"output": {
"netWater": 80,
"waterPerCombinedHarvest": 2
}
}Limitations and assumptions
- Harvest masses need a common basis and interval; this local ratio does not establish environmental sustainability or actual productivity.
- 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 calibrated measurements and a complete system nutrient/water balance with qualified professional interpretation for actual management.
References
Similar or alternative tools
- Aquaponic Solids Separator Captured Mass Term
Return a solids-separator mass difference and fraction.
- Aquaponic Nitrate Mass Change One Interval
Return nitrate inventory change on a supplied unit basis.