Verify the inputs
Measure or document each input. If a value is only an estimate, record its source and test a conservative alternative.
Wells & water/ CALCULATOR
Water stored above a well-pump reserve level
Estimate the cylindrical water column and volume above a protected pump-intake level.
FROM ESTIMATE TO ACTION
Use the result, not just the number.
Keep the calculation traceable
Save the input link or copied result together with the date, units and assumptions. A number without its inputs cannot be checked later.
Confirm the decision
Compare the estimate with the related guide, current product data and requirements that apply at your location before buying or building.
Inputs to verify
- Internal well diameter (mm)
- Use the actual internal diameter of the water column, not only the nominal casing label.
- Observed water-level depth (m)
- Measure down from the same documented reference point used for the pump depth.
- Pump-intake depth (m)
- Depth from the reference point to the pump intake or controlling inlet.
- Protected submergence above intake (m)
- Water column intentionally kept above the intake; establish it from equipment and well design.