Having worked in irrigation for many years, we know that system performance is highly variable. There are many causes, ranging from design flaws, through installation, component failure and maintenance. Irrigators need to know how much water their systems are applying and how efficient the system is.

We believe irrigators should calibrate (bucket test) their systems at least annually. A calibration will tell you if the system is performing adequately.

If you discover the system is not performing to expectation, you may want a more detailed investigation. We developed New Zealand’s Code of Practice for Irrigation Evaluation, now the Irrigation New Zealand Piped Irrigation System Performance Assessment Code of Practice. It sets out standard ways to assess system performance using comprehensive system checks. These are usually conducted by trained technicians using System Evaluation tools. Irrigation NZ trains and certifies Performance Assessors.

In 2026 we launched new online tools for Irrigation Performance Assessment. You can find them and use them for free at www.landwise.org.nz/home/tools/irrigation-evaluation-irrig8/  

Choose the system you want to check, and whether you want a quick bucket test or to complete a full system evaluation. Both are there – all are free.

Consider joining LandWISE as a Financial Member – it costs very little, but let’s them provide valuable services for sustainable food and fibre production.

Contact us if you would like a professional to conduct a full system evaluation to determine the cause of non-performance. We know people across New Zealand who can help.