Watering and Irrigation
Deep Watering Interval Calculator
Deep Watering Interval requires one defined scenario. Estimate time to deplete a selected root-zone water store. Use target root-zone storage and average daily depletion from the Deep Watering Interval record.
Enter values for estimated interval
Keep Deep Watering Interval units with their measurements.
Deep Watering Interval beyond the formula
Do not wait for full depletion when plants show stress earlier.
A zero Average daily depletion leaves estimated interval undefined in Deep Watering Interval.
Preparing the Deep Watering Interval values
For estimated interval, collect Target root-zone storage and Average daily depletion on the Deep Watering Interval basis. For remaining irrigation need, use Rain Gauge Irrigation Credit Calculator.
- Target root-zone storage
- The Deep Watering Interval target is 2.1 in in the starting case.
- Average daily depletion
- The Deep Watering Interval assumption is 0.16 in/day; note the source of any replacement.
Sensitivity of the Deep Watering Interval result
To compare alternatives, save the current result before changing Average daily depletion. Label both cases so the source measurements remain clear.
Arithmetic used for Deep Watering Interval
Division connects Target root-zone storage and Average daily depletion in this Deep Watering Interval calculation.
For the prefilled measurements—target root-zone storage at 2.1 in and average daily depletion at 0.16 in/day—the calculated answer is 13.13 days. Need seasonal water savings? Open Xeriscape Water Savings Calculator.
What the estimated interval output means
Read Estimated interval as the answer to “Estimate time to deplete a selected root-zone water store.” Keep the Deep Watering Interval units attached.
Deep Watering Interval in practical terms
The planning question for Deep Watering Interval is whether you can estimate time to deplete a selected root-zone water store. Deep Watering Interval measures this portion as Estimated interval. Leaching Irrigation Volume Calculator calculates leaching water volume separately.
Record adjustments outside Estimated interval separately. The Mulch Irrigation Reduction Calculator provides mulched water use.
Deep Watering Interval low-and-high comparison
Create a second case by setting Target root-zone storage to 2.31 in. The initial setting is 2.1 in, and the corresponding estimated interval values are 13.13 days and 14.44 days.
This keeps the effect of target root-zone storage distinct from changes in the other Deep Watering Interval inputs.
Do not replace the source measurement merely because one scenario gives a preferred answer.
Before relying on estimated interval
Does Deep Watering Interval adjust itself as crop demand changes?
No. Recalculate estimated interval after meaningful changes in weather, canopy size, root depth, or irrigated area.
Can Average daily depletion be zero in Deep Watering Interval?
In Deep Watering Interval, zero average daily depletion makes estimated interval undefined.
How does “Do not wait for full depletion when plants show stress earlier.” affect estimated interval?
That field condition is not a separate input in Deep Watering Interval. Revise target root-zone storage when it changes the measured case.