Irrigation Water Use Limits for Canterbury

The objective of this project was to develop a robust method for determining the amount of water reasonably required to efficiently irrigate pasture and arable crops throughout their life cycle, using data that is readily available for the Canterbury region, and which can take account of the primary effects of irrigation system type.

 Reasonable irrigation water use was assumed to be that incurred when:

  • Irrigating to avoid yield loss due to soil water stress, to a defined reliability standard; or
  • Irrigating according to a management regime that is practical for the irrigation equipment available on the farm in question.

The efficiency test is assumed to be met when best practice options are used to maximise irrigation efficiency subject to the constraints imposed by the existing irrigation equipment.

Contact person: John Bright

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