IRRIG8: Drip Micro Evaluation

IRRIG8 does not store your data or keep any records. Leaving or refreshing this page will delete all your data, so print reports and export the data or graphs if you want to save them. This calibration tool is designed to meet the IrrigationNZ: NZ Irrigation System Performance Assessment Code of Practice – Part C: Micro Irrigation. Download the code for more guidance. For a quick system assessment, see the Drip Micro Calibration tool.

NOTE: IRRIG8 does not store your data or keep any records. Leaving or refreshing this page will delete all your data, so print reports and export the data or graphs if you want to save them. To have a copy you can reload and edit, download the Save Session csv file and save it. This tool lets you upload it again to automatically repopulate all your data.

Beta version: See disclaimer at foot of page

💧 Drip & Micro Irrigation Evaluation Tool v1.0.0

Field Emission Uniformity following the IrrigationNZ Code of Practice Part C

💾 Save or Reload an Evaluation

Save everything entered on all tabs, plus the results, to a CSV file on your computer. Load it later to fill the tool back in and recalculate.

Files stay on your computer; nothing is uploaded to the website. Loading replaces what is currently entered.
🏡 Farm & Property Information
👨‍🔬 Evaluator Details
🖼️ Report Branding (Optional)
JPG, PNG or GIF, max 500KB
⚙️ System & Emitters
For compensating emitters, pressure is not used to work out flows (no Pressure EU); readings are checked against the compensation range instead.
📐 Manufacturer Data (if available)
Recorded for the report, and used if chosen below.
Code Part C, Estimating CVman. If the chosen value is missing, the other is used.
Used when no adjusted-pressure test is entered. Not needed for compensating emitters.
🚿 Drainage After Shut-down
Recorded for the report.
🎯 Irrigation Target
Optional. Gives the applied-to-target ratio and an adjusted run time for each zone.
🌱 Zones (Blocks) and Emitter Flow Tests

Each zone has its own emitter flow test (Code Part C, 3.1). Test the cleanest, an average and the dirtiest areas: 12 emitters is sufficient for clean and average areas when variability is low; test more (e.g. 28) in the dirtiest area. Collect one emitter per container for at least 5 minutes or 250 mL. The repeat of the clean-area test at a changed pressure is not a zone: enter it in the Adjusted Pressure Test section below.

🔁 Adjusted Pressure Test: Clean-Area Emitters at a Changed Pressure

Repeat the cleanest-area test with lateral pressure changed by about 20%, using the same emitters in the same order. Enter it here, not as a zone. It determines the discharge exponent x and coefficient Kd; without it the manufacturer's x and Kd are used. Not needed for pressure-compensating emitters.

📄 Load Flow Volumes from CSV

Columns: Zone number, Emitter number, Volume (mL). Use zone 0 for the adjusted pressure test.

🏭 Headworks Pressures
A loss over 50 kPa across the filters is flagged.
🔧 Block Pressure Survey (Code Part C, 3.1)

Pressure at the beginning, middle and end of the first and last laterals in each assessed block, plus the off-take pressure upstream of each block control valve. Measure at least three blocks or 10% of blocks, including the highest and lowest areas on undulating ground.

📄 Load Pressures from CSV

Columns: Block, Lateral, Inlet (kPa), Middle (kPa), End (kPa), Off-take (kPa, optional).

What is calculated

  • Pressure Emission Uniformity (PEU) from pressure-derived flows (not used for pressure-compensating emitters)
  • Emitter Emission Uniformity (EEU) from manufacturing and field defect variation
  • Uneven drainage factor, and zone factor from zone applied depths
  • Field Emission Uniformity combining all four (Clemmens-Solomon), rated to Code Part C Table 3
  • Adjusted run time per zone for a target depth, and headworks and mainline pressure losses
📋 Evaluation Report