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Elements and Performance Criteria

1. Carry out pre-start checks
   • Determine work requirements and identify hazards, assess risks and implement control measures
   • Select required tools and equipment and check for safe operation
   • Select and use suitable personal protective equipment
   • Check water, power, fuel and lubricants to confirm all are available and the control system is operational
   • Prime pumps, if necessary, and open or close valves and controls as directed
   • Calibrate pressure and flow testing equipment
   • Carry out other pre-start system checks
2. Inspect and operate the system
   • Implement start up sequence
   • Check emitter spacing against the irrigation plan
   • Adjust water pressure as required
   • Keep filters clear and replace as required
   • Correct or repair all malfunctions, leaks and blockages and report
3. Monitor irrigation system performance
   • Check emitters for output
   • Calculate application rate of water
   • Check the water distribution pattern in the irrigated area
   • Monitor moisture levels in the root zone
   • Minimise environmental impacts of the operation
4. Shut down irrigation system
   • Apply water for sufficient time to achieve required soil moisture levels and allowing for weather conditions
   • Shut down system components and drain
   • Record and report irrigation activities

Range Statement

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Performance Evidence

The candidate must be assessed on their ability to integrate and apply the performance requirements of this unit in a workplace setting. Performance must be demonstrated consistently over time and in a suitable range of contexts.

The candidate must provide evidence that they can:

assess soil moisture levels

carry out measurements for output and distribution

measure and interpret flow rates and pressures

monitor system effectiveness including:

application rates

depth of irrigation

emitter output

irrigation times

pressure variations and blockages

salinity levels and water quality

perform shut down procedures

read and follow operations manual and procedures

record data

start up the system and carrying out operational checks

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Knowledge Evidence

The candidate must demonstrate knowledge of:

principles and practices of pressurised irrigation system operation

critical measures for moisture availability including:

evapotranspiration

field capacity

infiltration rates

readily available water

water holding capacity

wilting point

electrical hazards including:

contact with pumps, motors, other live components

short circuits

standing laterals to remove blockages

water spray onto power lines

energy efficiency indicators and benchmarks for low volume irrigation

environmental impacts of irrigation using water from any ground or underground source

general irrigation methods for low volume systems

main components of low volume and sprinkler irrigation systems

principles of irrigation and the water cycle

pump types used in irrigation systems and their operation

shutdown sequence and flushing procedures

soil characteristics

soil, plant and water relationships

water requirements of plants and crops consistent with sound environmental management

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