The Waikirikiri / Selwyn Near River Recharge project
Recharging underground aquifers and augmenting stream flow in the Selwyn water zone.
Current site status
Latest update: 29 May 2021
Current flow: 0 – The Near River Recharge project is currently not running. Operations are expected to recommence by August following planned winter maintenance to the Central Plains Water scheme.
Cumulative volume: 5 million cubic metres since March 2021.
Supporting the lifeblood of Selwyn and Te Waihora
The Waikirikiri / Selwyn Near River Recharge project is a multi-million dollar scheme to enhance cultural, environmental and recreational values in the region by discharging clean Rakaia River water into the groundwater system near the Waikirikiri / Selwyn River during dry periods.
Utilising water from Selwyn District Council and Central Plains Water (CPW) consents, the project can pour up to 3.5 cumecs of water from the Rakaia River into a large leaky basin and outflow channel close to the Waikirikiri / Selwyn River.
This water percolates into the ground, recharging aquifers and supporting downstream flow in the Hororata River and Waikirikiri / Selwyn River, without directly mixing water from the two river systems.
- River flow data for Hororata River at Mitchells Road.
- River flow data for Selwyn River at Coes Ford.
- Rainfall data for Whitecliffs.
- Rainfall data for Ridgens Road.
Greendale School students checking for pests at the site recently.
Providing habitat for precious native species
The springs that feed the lower reaches of the Hororata River are an important habitat for the endangered kōwaro (Canterbury mudfish).
The project aims to increase groundwater levels and flows in these streams during dry periods, creating a better habitat for this unique endemic species.
The edges of the recharge basin have been planted with native seedlings and plant species to encourage native birds to nest nearby.
A lizard habitat has also been created at the site. Greendale School are supporting efforts to protect and restore native species at this site.
A key part of our water management strategy
The Waikirikiri / Selwyn Near River Recharge project is believed to be the largest scheme of its type in the world specifically focused on environmental, cultural and recreational objectives.
It is a key aspect of the Canterbury Water Management Strategy, and was recommended by the Selwyn Waihora Water Zone Committee and included in their Zone Implementation Programme Addendum (ZIPA) in 2013.
The Near River Recharge project cost around $2.8 million dollars, funded by Environment Canterbury and the Ministry for the Environment’s Freshwater Improvement Fund, with Central Plains Water providing in-kind support.