Permeable paving essential for urban planning

Permeable paving essential for urban planning

With the increasing focus on sustainable urban design and resilience to flooding, Jagas Paving is proud to announce the arrival of our range of truly permeable pavers in New Zealand.

With the increasing focus on sustainable urban design and resilience to flooding, Jagas Paving is proud to announce the arrival of our range of truly permeable pavers in New Zealand.

Jagas Director Robert Sweet highlights the difference between the permeable paving that has previously been available, and the new HYDROPAVERS™ permable paving tiles: “This paving is truly permable paving – water can flow through these pavers at a rate of 50mm per minute. Other permeable paving solutions simply rely on leaving spaces between the pavers, which are prone to clogging.”

Urban surfaces that allow water to drain naturally rather than contributing to stormwater run off are set to become both an environmental imperative and a Council requirement.

water-picture-editedThe permeable paving supplied by Jagas is so effective that in most cases, specifiers can omit drains from plans for paved areas and carparks completely, as water absorbtion is so rapid. From a long term urban planning perspective, the permeable paving also provides the added benefit of reducing the ‘heat island’ phenomenon by creating a regulated surface temperature and surface humidity.

Increasing flooding incidences in Wellington have lead Mayor Celia Wade Brown to state in the Herald that “The combination of some older drains, more impermeable surfaces and increasing rainfall severity means that system modelling is more and more important. “For the longer term we must design our streets and sections to be more permeable and add more planting.”

Councillor Iona Pannett told Channel 3 News the council was now undertaking a review of the drain system to prevent further floods. “We have to take a careful and scientific approach – if we fix only part of a network without working to a plan, we risk simply transferring the problem,” she said. “We have been spending millions of ratepayers’ dollars in the past couple of decades to increase stormwater capacity in areas.”

A Wellington council report states “It is now being realised that conventional systems for managing our water resources are not viable in the long term, and digging up the streets to replace existing drainage pipes with even larger ones is not the answer.”

In response to flooding in New Zealand’s capital, the Dominion Post reported that the Wellington council has implemented a guide to Water Sensitive Urban Design (WSUD) which aims to protect and enhance the natural environment and take strain off the stormwater system by employing urban planning features including green roofs, permeable paving and rain gardens.

Mayor Wade-Brown says almost “every square metre” of the city is involved in the process of stormwater runoff, which means pollutants are collected by the run off and flow into streams and pipes, before being deposited in the harbour. These contaminants affect marine life and pollute waterways along their path to the ocean.

Extensive impermeable surfaces contribute to the stormwatre runoff problem, sending rainfall straight to the drains. The area of impermeable surfaces continue to increase with more paved carparking areas and subdivision. Gardens can absorb up to 10 litres of rainwater a minute, but the area of gardens in our cities continue to shrink with increasing numbers of apartments and high-density developments.

Jagas Hydropaver Permeable Paving is a solution to puddles in carparks, and dangerous road surfaces in heavy rainfall, and will also become a critical piece of the puzzle in urban stormwater planning.