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 drawdown & specific capacity
Interpret water levels from a recorded pumping test.
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 depth (m)
- Measured below a fixed datum before pumping.
- Pumping water depth (m)
- Use the same datum and record the test duration.
- Measured test flow (L/min)
- Stable measured flow at the stated test conditions.