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

 


New approach to flooding, erosion, pollution


New approach to address flooding, erosion, pollution

North Shore City Council will this week consider a comprehensive approach to managing stormwater, which seeks to minimise the environmental impact of development in the city.

The council's works and environment committee chairperson, Joel Cayford, says a major change in the way the city manages stormwater is urgently needed.

"Last year we introduced new policies on stormwater outfalls and kerb outlets. We now need to encourage all property owners to take responsibility for the stormwater that runs off their property," Councillor Cayford says.

Hydrological neutrality is a concept that means stormwater is managed at source, in line with the Auckland Regional Council's Air, Land and Water Plan. This means runoff does not increase when new buildings and hard surfaces such as roofs, driveways and solid paving are constructed. Because most of North Shore City has Waitemata clay soils which can be almost as impervious as concrete, good urban design and stormwater management techniques are needed to reduce runoff.

Joel Cayford says adopting a policy of hydrological neutrality could limit stormwater discharges from new developments, to those of the pre-developed bush catchment in areas where protecting the streams is a priority. The priority areas are being addressed by the Project CARE Kokopu Connection, North Shore City's network consents for the ongoing operation of the council's wastewater and stormwater systems.

Low impact stormwater design practices that contribute to hydrological neutrality include the use of onsite stormwater management (OSM) devices, such as rain gardens, permeable paving and rainwater tanks on private property, and stormwater ponds, swales and detention tanks shared between a number of private properties.

"Council needs to practice what it preaches and we need to address problems with flooding, erosion and stormwater quality from runoff that flows from roads and other public places," says Councillor Cayford.

"We're already installing water quality devices such as sand filters, gross pollutant traps and catch pit inserts throughout the city. We may also need to fit ponds, swales and detention tanks, to better manage and treat runoff from roads."

North Shore City's water services general manager, Geoff Mason, says the issues involved are complex and major changes in the way council manages stormwater would likely affect council activities and every property in the city, over time.

"Changes in policy to meet the city's environmental objectives, outlined in our City Blueprint, would also mean significant changes in how we manage stormwater," Mr Mason says.

"The kerb and channel style of road, management of sediment and erosion during development, responsibility for flood prone areas, stream management and how capital works and maintenance are carried out, could all be up for review."

"We would need to carry out comprehensive investigations and cost-benefit analysis during which the issues of affordability and practicality would be addressed," he says.

Other issues that would need to be decided include the ownership of onsite stormwater management devices on private property and who pays for the device, installation, maintenance and renewal in future years. Devices would also need to be monitored to ensure that they were working effectively.


© Scoop Media

 
 
 
 
 
Parliament Headlines | Politics Headlines | Regional Headlines

 

Also, Loan Interest: Productivity Commission On Tertiary Education

Key recommendations include better quality control; making it easier for students to transfer between courses; abolishing University Entrance; enabling tertiary institutions to own and control their assets; making it easier for new providers to enter the system; and facilitating more and faster innovation by tertiary education providers... More>>

ALSO:

Higher Payments: Wellington Regional Council Becomes A Living Wage Employer

Councillor Sue Kedgley said she was delighted that the Wellington Regional Council unanimously adopted her motion to become a Living Wage employer, making it the first regional council in New Zealand to do so. More>>

ALSO:

Scoop Images:
Dame Patsy Reddy Sworn In As Governor-General

This morning Dame Patsy Reddy was sworn in as the New Zealand Realm’s 21st Governor-General. The ceremony began with a pōwhiri to welcome Dame Patsy and her husband Sir David Gascoigne to Parliament. More>>

ALSO:

Ruataniwha: DOC, Hawke's Bay Council Developer Take Supreme Court Appeal

The Department of Conservation and Hawke's Bay Regional Investment Company (HBRIC) are appealing to the Supreme Court over a conservation land swap which the Court of Appeal halted. More>>

ALSO:

With NZ's Marama Davidson: Women’s Flotilla Leaves Sicily – Heading For Gaza

Women representing 13 countries spanning five continents began their journey yesterday on Zaytouna-Oliva to the shores of Gaza, which has been under blockade since 2007. On board are a Nobel Peace Laureate, three parliamentarians, a decorated US diplomat, journalists, an Olympic athlete, and a physician. A list of the women with their background can be found here. More>>

Gordon Campbell: On The Key Style Of Crisis Management

At Monday’s post Cabinet press conference Key was in his finest wide- eyed “Problem? What problem?” mode. No, there wasn’t really a problem that top MPI officials had been at odds with each other over the meaning of the fisheries policy and how that policy should be pursued... More>>

ALSO:

Mt Roskill: Greens Will Not Stand In Likely Post-Goff By-Election

“The Green Party’s priority is changing the Government in 2017, and as part of that we’ve decided that we won’t stand a candidate in the probable Mt Roskill by-election... This decision shows the Memorandum of Understanding between Labour and the Green Party is working." More>>

ALSO:

Get More From Scoop

 

LATEST HEADLINES

 
 
 
 
 
 
 
 
 
Regional
Search Scoop  
 
 
Powered by Vodafone
NZ independent news