Description
Calculate the top-up share of a resulting reservoir volume.
Hydroponic records distinguish reservoir volumes, catch rates, media volume, nominal pump displacement and chemical reference labels. A top-up share can use final rather than initial volume, while a pH difference is not a chemical-dose calculation. Supplied parameters do not establish water quality, crop suitability or hydraulic performance.
Calculate the top-up share of a resulting reservoir volume.
When to use this tool
Use Reservoir Topup Volume Fraction when you already have initialVolume, topupVolume and need to calculate the top-up share of a resulting reservoir volume.
How to use the tool and how it works
- Enter initialVolume, topupVolume. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read finalVolume, topupFractionOfFinal. Use the output convention below.
Require initial/topup>=0 and positive sum; return final=initial+topup and topup/final.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| initialVolume | Initial Volume | Required. Finite number; minimum 0. |
| topupVolume | Topup Volume | Required. Finite number; minimum 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| finalVolume | Final Volume | Required. Finite number. |
| topupFractionOfFinal | topupVolume/(initialVolume+topupVolume), not the fraction of initial volume. | Required. Finite number. |
{
"input": {
"initialVolume": 80,
"topupVolume": 20
},
"output": {
"finalVolume": 100,
"topupFractionOfFinal": 0.2
}
}Limitations and assumptions
- The denominator is final volume, not initial volume. No concentration, chemistry, water quality or suitable top-up quantity is inferred.
- 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 water and flow observations, actual reservoir geometry and the complete intended chemical or hydraulic model. Preserve concentration, temperature-reference and time bases; local offsets and volume shares do not choose nutrient, pH or irrigation adjustments.
References
Similar or alternative tools
- Hydroponic Grow Media Water Holding Fraction
Calculate retained water as a fraction of supplied media bulk volume.
- Hydroponic Emitter Catch Volume Rate
Calculate emitter catch rate in mL/min and L/h.