Test Pumping

Test pumping is a crucial service that determines the true productivity and sustainability of a borehole after drilling and installation. It is the final verification step before a borehole is commissioned for full-time water supply. At Kehill Geoengineering Limited, we provide professional test pumping services to accurately assess borehole yield, water level behavior, and long-term pumping capacity using standard hydrogeological procedures and calibrated equipment.

Test pumping involves abstracting water from a borehole at controlled and measured rates while continuously monitoring the response of the water level. This process helps determine how much water the borehole can sustainably produce without overexploitation of the aquifer.

The test is conducted in stages, including step testing and constant rate pumping, followed by recovery monitoring to assess how quickly the borehole returns to its natural water level.

Test pumping provides essential data required for:

• Determining sustainable borehole yield
• Selecting the correct pump size and specifications
• Assessing aquifer performance and recharge capacity
• Preventing over-pumping and borehole failure
• Supporting Water Resources Authority (WRA) licensing requirements
• Ensuring long-term reliability of water supply systems

We use calibrated pumping equipment and accurate measurement instruments to ensure reliable results. Our process includes continuous monitoring of discharge rates, drawdown levels, and recovery patterns to produce a detailed hydrogeological performance report.

After completion of test pumping, we provide a comprehensive report that includes:

• Borehole yield (litres per hour)
• Drawdown and recovery data
• Recommended pump capacity
• Aquifer performance analysis
• Sustainable abstraction rate
• Technical recommendations for installation