ReNew 135 editorial: Water inside and out

ReNew Editor, Robyn Deed

In Sophie Thomson’s Adelaide Hills garden, indigenous plants that survived under a ‘no watering’ scheme for several years have struggled this year, with some dying. In Victoria, we’re seeing reservoir levels dropping, street trees struggling and many gardeners dismayed over just how dry the soil is. It’s a similar story in many parts of Australia, with the tinder-dry bush causing devastating fires such as those in the Tassie wilderness.

If we don’t want to abandon our gardens, critical as they are in providing shelter, cooling and habitat, as well as food, what do we do? In this issue, we explore some of the approaches that can help gardens thrive with efficient and effective use of water.

Sophie Thomson issues a challenge to rethink our gardens into watering zones, with most of the garden given to ‘no water’ and ‘low water’ plants — think local indigenous planting and choosing plants appropriate to the site and conditions. But that doesn’t mean abandoning the higher water usage plants altogether, such as vegies; instead, we look at more efficient ways to water, including drip irrigation — potentially regulated according to temperature and rainfall — and wicking beds, where the water is delivered to the plant roots and wicks up to where it’s needed. We’ve previously covered rainwater and greywater use in detail (see ReNew 125 and 130) so this time we shift attention to using stormwater via rain gardens, a way to reduce polluted runoff into our rivers and water the vegies at the same time. We also visit Melliodora, the Australian permaculture co-founder’s property in Victoria, and find out how permaculture principles meld with water efficiency.

In the tropics and subtropics, the problem is slightly different — coping with deluges in summer and relatively dry winters. Two northern Australian gardening experts give advice on what to plant and ways to use water effectively in these regions.

It’s not all about gardens. We also look at where households can save water, inside and out, and compare water usage around Australia. Our mini guide is on waterless toilets, definitely worth considering as a water- and pollution-saving measure.

Our main buyers guide is on heating. We often get queries about hydronic heating, so we’ve updated our guide to include both reverse-cycle air conditioners and hydronic.

And amidst all the talk about batteries and going off-grid, we take a look at what’s available in all-in-one battery systems, and where the market is heading. We also examine the sustainability benefits of solar and solar + battery systems. If you’ve ever wondered just how much effect your solar system can have on the grid—can it really affect the output of a coal-fired power station?—this article is for you.

Plus there’s lots more: a DIY on double glazing, a mini hydronic system, reviews of 10 water-saving books, where wind farms are heading and the Pears Report on how different the approaches to energy policy can be.

As we head into a disturbingly hot start to autumn, an election year and post the Paris climate talks, we welcome your feedback and input. We hope this year we can see action on climate change rather than just words.

Robyn Deed
ReNew Editor


ATA CEO’s Report

The year 2015 ended with an historic agreement at the United Nations Climate Change Conference in Paris to limit global warming below 2°C. As a signatory to the agreement, Australia is now part of the push for a net zero emissions world.

At the ATA we are at the forefront of advocating for, encouraging and advising on sustainable technology and practices in Australian homes and communities to make a big impact on reducing carbon emissions. We are continuously researching and investigating new and emerging technology for a more sustainable future.

As an example of putting knowledge into action, we were very excited to team up with the Centre for Appropriate Technology (CAT) to install an off-grid solar system at the Oriners ranger base in far north Queensland. We have been admirers of CAT’s work installing solar systems in remote Indigenous communities for many years and have profiled some of their work in ReNew previously. After funding cuts to their Bushlight program, the ATA was more than happy to work with CAT to trial a project reducing the costs of installing a system, with ATA members volunteering skills and labour.

A big thankyou to David Tolliday, John Dickie, Olivia Laskowski and CAT’s Andre Grant for their work and dedication on a successful first project. We look forward to collaborating again in our goal for a net zero-emissions world.

Donna Luckman

You can purchase ReNew 135 from the ATA webshop.

Prize ReNew sub banner