COLOR-Waatea logo 2016-final

On Air Now
Radio Waatea

10:00am - 10:36am
Ed Sheeran

New Multimillion-Dollar Freshwater Wetland Designed by Iwi Artists - One of NZ’s Largest
Impact PR for Drury South Crossing

Share to Email
Share to RSS
Share to Print

New Multimillion-Dollar Freshwater Wetland Designed by Iwi Artists - One of NZ’s Largest

A new multimillion-dollar public wetland, designed by local artists to improve water quality in South Auckland waterways, and support endangered native wildlife has opened.

The 35,000sqm freshwater wetland is one of the largest constructed wetlands in the country.

As with the rest of New Zealand, wetlands in Auckland have been significantly depleted and degraded however they continue to support a range of native species and around one-third of the nationally threatened plants in the region.

The constructed wetland at the 361 hectare Drury South Crossing subdivision, the country’s largest industrial and residential development, is designed to improve water quality in the area and provide a habitat for endangered native eels, fish and birds and, form part of an extensive new public recreation area.

Located in one of Auckland’s deepest flood plains, the wetland is designed to hold floodwater volumes of up to 58,900m3 - the equivalent capacity of 23.5 Olympic size swimming pools.

The wetland is designed in the shape of a tuna (eel), a culturally significant motif that provides the stormwater management system with a mechanism to reduce the speed of water entering the catchment area through a network of high volume intake pipes at up to 16m3 of water per second.

Dam design experts on the project worked with Ted Ngataki and Maaka Potini, local Maori artists, to incorporate Tikanga Maori and the concept of a tuna/ eel into the Wetland design.

The tuna was selected as having particular significance to iwi as they are indigenous to the area and were once prevalent and a key part of traditional diet and trade.

Peter Norfolk, project manager from Tonkin Taylor, says the new wetland is uniquely designed to act as a dam in both directions - holding the wetland water in during normal operation but overtopping into the wetland in very large flood events to provide additional flood capacity in the floodplain.

“The tuna design was chosen for both its cultural significance to mana whenua as well as for functional purposes.

“The complexity of the S-shaped design with its winding curves and varying elevations is necessary to control the high velocity of the water entering the forebays through 2-2.5m pipes - reducing it to a slow meandering stream and filtering the water to allow the natural removal of sediment and pollutants before it passes through a green outfall into the Hingaia Stream and into the Manukau Harbour,” he says.

Norfolk says the wetland has taken two years to complete and required the excavation of more than 396,000 tonnes of earth.

He says the creation of the wetland with this degree of complex geometry would not have been possible within this timeframe without advancements in 3D modelling technology and integrated guidance systems for excavators.

“Bringing this design to life in a relatively short space of time required the latest in sophisticated 3D modelling and construction techniques - which are used to guide the excavators via GPS,” he says.

Stephen Hughes, Drury South Crossing CEO, says a number of environmental considerations have been integrated into the new subdivision and include removing pollutants such as zinc the most common of all heavy metal contaminants in urban rivers and streams, from roofing materials used on site.

“In the past, residential lawns and grass around houses would have helped contribute to capturing sediment from stormwater runoff however modern subdivisions tend to have less lawn which increases the need to capture runoff from surrounding roads and housing.

“While filtering stormwater and runoff is a key aspect of protecting our urban waterways, we have gone a step further by preventing unpainted roofing materials made with zinc from being used at the subdivision.

“The creation of this new wetland and public recreational area is designed to set a new standard for residential and industrial developments in the Auckland region,” he says.


Copyright © 2021, UMA Broadcasting Ltd:


TRM Classes
NLC - One More Try - (feat Stanley T) [Official Video]
OPINION: Labour refuse to do anything about racist drug laws
Martyn 'Bomber' Bradbury: An unprecedented coalition of 25 organisations like the New Zealand Medical Association, the Mental Health Foundation, the Public Health Association, the Maori Law Society, the Drug Foundation, Hapai te Hauora, and JustSpeak have called on drug reform citing health and societal issues while pointing out how racist our drug laws are.
OPINION: More Maori men will be found guilty of sexual assault thanks to law change
Martyn 'Bomber' Bradbury: More criticism last week of the Sexual Violence Legislation Bill when the co-President of the Penal Reform League, Lady Heeni Phillips-Williams, warned again that the law changes would see more innocent Maori men found guilty of rape and sexual assault.
OPINION: Maori Party brutally outflanks Kelvin Davis again
Martyn 'Bomber' Bradbury: News last week that the Māori Party are supporting Waikeria Prison protesters in filing civil rights claims against Corrections brutally outflanked the hapless Kelvin Davis once again.





Enter your email address to receive regular updates from Waatea News.
  • fb

On Air Now
Radio Waatea

10:00am - 10:36am