Local Govt | National News Video | Parliament Headlines | Politics Headlines | Search


Outfall data collected from buoys

Outfall data collected from buoys

North Shore City Council has retrieved a series of buoys, which have been moored in the Rangitoto Channel, to obtain data needed to help it prepare design details for a new ocean outfall for the Rosedale wastewater treatment plant.

Information on water temperature, salinity and ocean currents recorded by data sensing equipment on the buoys, will now be analysed both here in New Zealand and in the United States.

The proposed new outfall, planned for completion by 2010, will take high quality treated effluent and discharge it 2.6 kilometres out into the Rangitoto Channel.

The water measurements are part of the council's wide-ranging assessment of the entire route, including the on-shore underground section of the outfall.

At the same time as the buoys were retrieved, two further surveys were carried out - one a seabed survey to measure sand levels, and the other a geophysical survey to investigate the composition of the seafloor.

The council is working in association with environmental consultants Maunsell Ltd, and the National Institute of Water and Atmospheric Research (NIWA) to gather and analyse the information.

Council planning and projects group manager Adrian Vosloo, says the buoys obtained a comprehensive set of data, covering the entire six month period they were in the water.

The data will provide valuable information on how the water discharge plumes from the new outfall will dilute and disperse into the Hauraki Gulf, and whether water will form thermal layers during the spring and summer.

Results from the buoys and the two surveys are expected in about six months time.

© Scoop Media

Parliament Headlines | Politics Headlines | Regional Headlines

Supreme Court: Worksafe Decision On Whittall Pike River Prosecution Unlawful

The question in issue on the appeal was whether WorkSafe New Zealand acted to give effect to an unlawful agreement of this nature when it offered no evidence on charges against Peter William Whittall for breaches of the Health and Safety in Employment Act 1992...

The Supreme Court... has found that the decision to offer no evidence was made under an unlawful agreement to stifle prosecution. It has granted a declaration to that effect. More>>


Cullen To Chair: Tax Working Group Terms Of Reference Announced

Finance Minister Grant Robertson and Revenue Minister Stuart Nash today announced the Terms of Reference for the Tax Working Group and that the Group will be chaired by Sir Michael Cullen. More>>


Gordon Campbell: On The New Pike River Agency (And The Air Strike Wing)

Much of the sympathy the public still feels for the families of the Pike River miners has been sustained by the sense that the previous government – let alone the mining company and the processes of receivership and litigation – has never dealt honestly, or fairly, with them. More>>


Not Going Swimmingly: Contractor Cut, New Dates For Christchurch Sports Centre

“As an incoming Minister, I have been conducting a thorough review of progress on the Anchor projects and to learn of a $75 million budget blowout on this project was very disappointing..." More>>


Tertiary: Allowances, Loan Living Costs To Get Boost

“From 1 January, student allowance base rates and the maximum amount students can borrow for living costs will rise by a net $50 a week,” says Education Minister Chris Hipkins... further adjusted from 1 April 2018 in line with any increase in the CPI. More>>


Foreign Affairs: Patrick Gower Interviews Jacinda Ardern

Prime Minister Jacinda Ardern says discussions have already begun on how to bring climate change refugees into New Zealand under a Pacific seasonal employment plan... More>>


Gordon Campbell: On The Centre Right’s Love Of ‘Nanny State’

You’d almost think it was 2005 again. That was a time when the rugged individualists of the centre-right were being beset by government regulations on the nature of light-bulbs, the size of shower heads, the junk food available at school tuck shops and other such essentials... More>>




Featured InfoPages

Opening the Election