DU targets by head type
What distribution uniformity is achievable for fixed sprays, rotors, and rotary nozzles, and how Irrigaudit grades a result.
Reference · 3 tables
Irrigation audit reference tables
The three lookup tables an auditor reaches for while reading a catch-can result: what DU the hardware can achieve, what application rate the head type should be applying, and how fast the soil can drink it.
Precipitation rate ranges
How fast each head type applies water, and how to sanity-check a measured PR against catalogue ranges.
Soil intake rates
How fast sandy, loam, and clay soils absorb water, and the working values behind the cycle-soak split.
Figures on this page are ranges drawn from manufacturer catalogue data and guidance commonly cited in Irrigation Association auditor training material. They are for orientation and sanity-checking a measured result, not a specification for any particular product or site. Confirm hardware figures against the manufacturer datasheet for the installed nozzle at the operating pressure.
Frequently asked questions
Where do these reference figures come from?
They are ranges drawn from manufacturer catalogue data and guidance commonly cited in Irrigation Association auditor training material. They orient a measured result; they are not specifications for any particular product or site.
Why are the tables ranges instead of exact numbers?
Because the underlying quantities genuinely vary: precipitation rate depends on nozzle, pressure, and spacing, and soil intake depends on texture, compaction, and slope. A single number would be invented precision.