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Ararira-LII River/Te awa o Āraiara
About the area/Mō te wāhi
The Ararira/LII River is a significant spring-fed tributary of Te Waihora/Lake Ellesmere, New Zealand’s fifth largest lake and an important wetland ecosystem. Te Waihora has special significance to Ngāi Tahu as a tribal taonga representing a major mahinga kai and an important source of mana.
Unique features of this catchment include headwater springs, an extensive network of drains and waterways, and two wetland areas – Yarrs Flat and Yarrs Lagoon/Ta-rere-kau-tuku. The catchment’s network of highly modified waterways and remnant wetlands provide some habitat for native fish, bird and plant species although it is severely degraded.
The Challenge/Te wero
In the Ararira-LII River catchment there has been a significant loss of wetland, freshwater ecosystems and lowland habitat. Water quality is poor due to high levels of suspended sediment, nutrients (phosphorous) and faecal coliforms. Much of this has been caused by various productive land uses in the catchment and modification of the waterway, wetland and lagoon hydrology for drainage purposes.
Living Water’s key focus is transforming the drain and water network into a healthy freshwater ecosystem in this productive agricultural landscape.
- 6,600ha total catchment area
- 50% of the catchment is dairy farms
- 5 main types of farming (dairy, sheep, beef, deer, horticulture)
- Only 1% of the original vegetation remains on the Canterbury Plains
Projects in Progress
Trialling a range of on-farm mitigation tools to reduce the impact of nutrients and sediments on waterways
Trialling a catchment wide approach to managing drains and waterways
How we're working with mana whenua
Building capacity for biodiversity