Unit of competency Outline

Date retreived
22/07/2026 1:19 PM AWST

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Install gravity fed irrigation systems

Install gravity fed irrigation systems

Unit of competency
National Code
AHCIRG301
State Code
OBJ96
TGA Status
Current
DTWD Status
Approved
Current Release Number
1.00
Current Release Date
21/10/2019
View on TGA
State Implementation and Classification
Approved Date
28/01/2020
Field of Education
040327 - Plumbing
Original Release Date
28/01/2020
Nominal Hours
70
Description
This unit of competency describes the skills and knowledge required to install gravity fed irrigation systems.The unit applies to individuals who install gravity fed irrigation systems under broad direction and take responsibility for their own work.No licensing, legislative or certification requirements apply to this unit at the time of publication.
Notes
Elements and Performance Criteria
1. Organise resources for installation work
  • 1.1 Interpret plan, including identifying potential hazards and risks and implementing safe working practices to manage risks
  • 1.2 Select and use required materials, tools equipment and machinery and check for safe operations
  • 1.3 Select, fit, use and maintain safety and personal protective equipment applicable to the task
  • 1.4 Check water supply is compatible with system specifications
2. Set out and prepare site
  • 2.1 Measure and mark out structures and peg earthworks
  • 2.2 Prepare and maintain beds, diversion and conveyancing structures
  • 2.3 Install diversion and conveyancing structures, channels and beds
  • 2.4 Prepare bed surface using roto-buck
  • 2.5 Test structures for configuration, flow rates and capacity
3. Complete water measurement and tail-water works
  • 3.1 Install water measurement structures
  • 3.2 Install channels and tail water storages
  • 3.3 Install pumping equipment, lines and filters
  • 3.4 Confirm that the system configuration and capacity matches the installation plan
  • 3.5 Complete earthworks and structures according to plan
4. Operate pumps and siphons
  • 4.1 Prime pumps and open or close valves and controls
  • 4.2 Position and set up pipes, system equipment and outlets
  • 4.3 Prime and start siphons and other delivery mechanisms
  • 4.4 Implement start up sequence and slowly build up water levels and pressure
  • 4.5 Check pressure at the head-works and control valves
  • 4.6 Distribute water evenly to the targeted areas with minimal wastage and run-off
  • 4.7 Irrigate area and observe time lag between shut down and end of watering to minimise run-off and deep percolation
5. Measure and interpret water levels, flow rates and volume of water used
  • 5.1 Monitor and maintain head water levels
  • 5.2 Confirm that all water outlets are operating correctly
  • 5.3 Replace or clear blocked inlets and outlets
  • 5.4 Measure and record flow rates and water usage
  • 5.5 Implement irrigation changes as required
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