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
Well specific-capacity and pumping-level screen
Turn one stabilized pumping observation into specific capacity and a cautious linear screen for another flow.
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
- Static water-level depth (m)
- Measure from one documented reference point after an appropriate recovery period.
- Stabilized pumping-level depth (m)
- Use the level at the stated test flow after the observation has stabilized sufficiently.
- Measured test flow (L/min)
- Measure flow during the same period as the pumping-level observation.
- Flow to screen (L/min)
- Keep close to the tested range; extrapolation becomes increasingly unreliable.
- Pump-intake depth (m)
- Use the installed intake depth from the same reference point.
- Required water cover above intake (m)
- Set from pump, well-construction and professional requirements.