Saturday, 30 July 2016 10:51

Silt traps to help restore threatened peat lakes

Written by 
An aerial image captured by drone. An aerial image captured by drone.

Living Water partners, Fonterra and the Department of Conservation (DOC), have created much needed 'silt traps' on two of the Waikato Peat Lakes they're working hard to restore.

The silt traps, which Fonterra says are "great looking", are for Lakes Ruatuna and Rotomanuka.

Described as 'critically threatened' under the Land Environments of New Zealand Threatened Environments Classification, peat lakes are globally rare ecosystems.

The Waikato region is home to more than 30 of them.

The Waikato Peat Lakes area is one of five key catchments where Fonterra and DOC work in their Living Water partnership programme.

Living Water Fonterra North Island project manager Tim Brandenburg says the peat lakes are an integral part of New Zealand's landscape, with silt traps a key contributor to restoring lake water quality.

"The majority of pollution comes from sediment and excess nutrients that drain off cleared lands surrounding the lakes. Silt traps are like a vital organ the ecosystem needs to recover – they act like a kidney," says Brandenburg.

"We're artificially creating what would normally happen in nature – when a stream meanders through a wetland, and filters out silt coming downstream."

These culturally and historically important peat lakes are a significant focus for Living Water, as part of its mission to improve water quality and increase the abundance of native wildlife in five catchments where intensive dairying exists.

DOC Living Water Waikato site lead Mike Paviour says, "We've given the lakes the equivalent of a kidney transplant."

"On top of that, we're planting both the silt traps and lake edges with thousands of native wetland plants to provide habitat for native wildlife.

"We're excited to see the native species thrive as habitat becomes established, and we'll be working to improve public access so everyone can enjoy it."

Living Water works with farmers, iwi, hapu, community groups and key stakeholders to improve the abundance and variety of native wildlife and water quality.

The Waikato Peat Lakes catchment includes three lakes where Living Water continues on its mission to help restore Waikato's unique peat ecosystems.

The other Living Water catchments are Kaipara Harbour's Hikurangi catchment, Tīkapa Moana (Firth of Thames) Pūkorokoro/ Miranda catchment, Waikato peat lakes focusing on Lakes Areare, Ruatuna and Rotomānuka, Te Waihora (Lake Ellesmere) in Canterbury focusing on the Ararira LII catchment and Awarua -Waituna in Southland focusing on Waituna catchment.

More like this

Fonterra's in good shape

Fonterra released its interim results last month, showing a continuation of the strong earnings performance delivered by the co-op through the 2023 financial year. Here’s what Fonterra chair Peter McBride and chief executive Miles Hurrell said about the results…

China trade

OPINION: Last week's revelation that data relating to New Zealand MPs was stolen amid Chinese state-sponsored cyber espionage targeting two arms of the country’s Parliament could test the long-standing trade relations between the two countries.

Featured

National

Green but not much grass!

Dairy farmers in the lower North Island are working on protecting next season, according to Federated Farmers dairy chair Richard…

Council lifeline for A&P Show

Christchurch City Council and the Canterbury Agricultural and Pastoral Association (CAPA) have signed an agreement which will open more of…

Struggling? Give us a call

ASB head of rural banking Aidan Gent is encouraging farmers to speak to their banks when they are struggling.

Machinery & Products

Tractor, harvester IT comes of age

Over the last halfdecade, digital technology has appeared to be the “must-have” for tractor and machinery companies, who believe that…

» Latest Print Issues Online

Milking It

Takeover bid?

OPINION: Canterbury milk processor Synlait is showing no sign of bouncing back from its financial doldrums.

» Connect with Dairy News

» eNewsletter

Subscribe to our weekly newsletter