Estimate daily and crop-cycle water demand for a hydroponic zone using plant count, water delivered per plant, recovery rate, and production days. The result separates gross delivery from net make-up water.
Gross water = Plants × Liters per plant per day
Net make-up water = Gross water × (1 − Recovery rate)
The main result is fresh make-up water required each day after the entered share of drain is recovered.
Only count recovered water that is actually treated and reused. Add a separate operational reserve for peak weather and maintenance.
1,200 plants × 1.8 L/day = 2,160 L/day gross. With 30% recovery, net demand is 1,512 L/day, or 52,920 L over 35 days.
No. It estimates demand; subtract dependable rainwater supply separately.
Only drain captured, treated as needed, and returned to irrigation.
Yes. Set recovery to 0%.
Usually not. Use a representative average or calculate separate growth stages.
No. Add sanitation, flushing, leaks, and other facility uses to the result.
| Item | Meaning |
|---|---|
| Gross delivery | Total solution sent to plants each day |
| Recovery rate | Share of delivered water captured for reuse |
| Net make-up | Fresh water needed after recovery |
| Cycle total | Net daily water multiplied by production days |