The power of irrigation

As New Zealand’s largest agricultural region, Canterbury’s success is driven by abundant farmland, a conducive climate and a reliable water supply, supported by innovative, sustainable, world-class farming.

Central Plains Water Limited (CPWL) is central to Canterbury’s climate adaptation strategy. Our delivery of a reliable, sustainable water supply helps to ensure agriculture thrives despite changing conditions, fostering the long-term resilience of the region.

CPWL’s water supply has transformed central Canterbury’s agricultural landscape. Previously, 21,436 hectares relied on pumping water from the aquifers for irrigation. Converting to CPWL surface water has reduced the impact on aquifers, improved energy efficiency while maintaining crop yields.

The 23,564 hectares that was dry-land and dependent on rain, is now irrigated via the CPWL scheme. Production from this now irrigated land is significant and contributes to meeting the needs of a growing population and boosting the region’s economy.

The 2023/2024 season was dry and despite the green paddocks, Canterbury is in a ‘green drought’. National Institute of Water and Atmospheric Research (NIWA) data indicates central Canterbury had soil deficits of up to 110mm of rain.

To showcase the impact of reliable water, the AgriBusiness Group Ltd calculated production metrics for the 23,564 hectares of former dryland, comparing ‘with’ and ‘without’ CPWL water. The results show substantial yield increases directly attributed to the availability of CPWL water.

Without CPWL Water

• 33.89 million litres Milk
• 0.86 million kilograms Beef
• 9.41 million loaves Bread

With CPWL Water

• 475.46 million litres Milk
• 2.08 million kilograms Beef
• 12.29 million loaves Bread

Net gain from scheme

• 441.57 million litres Milk
• 1.22 million kilograms Beef
• 2.88 million loaves Bread