Overflow Magazine Autumn 2021

Quarterly Publication of Irrigation Australia (WA Region)

NO. 64 AUTUMN 2021

IN THIS ISSUE Waterwise groundwater planning in Cockburn

Water saving solutions for landscape irrigation

Hope Valley Nursery (Part 2)

Turf: a natural sponge for carbon dioxide

Back to basics: Seasonal adjustment

Wharf St Basin Next Generation Community Park

Pinebark shortage driving search for alternative

The multiple values of Perth’s roadside vegetation

Drippers effective in multiple applications

Notice of Intent required to pump desalination water

Contents

Keep up-to-date with irrigation in Australia, visit the IAL website at www.irrigationaustralia.com.au

Waterwise planning for the future of groundwater in Cockburn

8

Hope Valley Nursery (Part 2)

10

Back to basics: Seasonal adjustment

14

Supply Shortage of Pinebark Driving Search For Alternative

16

Drippers effective in multiple applications from vertical gardens to

Mark Your Diary June 2021 31/5 – 4/6 IRRICAD Design Course (virtual) 8-9

Basics in Wiring & Electrical Troubleshooting (virtual)

greenhouses and nurseries

20

From 14

Water saving solutions for landscape irrigation

22

Certificate III in Irrigation Technology June Intake (virtual)

16-18

Irrigation Pumps & Systems (virtual)

Turf: a natural sponge for carbon dioxide

24

Wharf St Basin Next Generation Community Park

26

Greening along the lines: the multiple values of Perth’s roadside

July 2021 From 12

Certificate IV in Irrigation Management – July intake (virtual)

19-22

Urban Irrigation Design (virtual)

vegetation 32 Notice of Intent required to pump desalination water

36

Certification options and demand for Irrigation Professionals is growing

38

Cover: Table top irrigation at Berrysweet Farms, Bullsbrook

National Contacts Bryan Ward - Chief Executive Officer Geoff Harvey - National Training & Marketing Manager Marike Froneman - Accountant (part time) Andres Jaramillo - Training and Certification Officer Chris Delphin - Business Administration Manager Kahla McKinless - Training & Certification Assistant Tracy Martin-National Membership & Regions Manager Natalie Bergman, Business Admin & Support Services

August 2021 3-5

Irrigation Efficiency Course (face-to-face)

9-12

Commercial Irrigation Design (virtual)

25

2021 Waterwise Irrigation Expo – 25 August 2021

For further information please visit: www.irrigationaustralia.com.au/training/training

WA Contacts bryan.ward@irrigation.org.au geoff.harvey@irrigation.org.au marike.froneman@irrigation.org.au andres.jaramillo@irrigation.org.au c hris.delphin@irrigation.org.au kahla.mckinless@irrigation.org.au tracy.martin@irrigation.org.au natalie.bergman@irrigation.org.au

Rebecca New – IALWA Administration Support (08) 6263 7774 email: adminsupport@irrigation.org.au Ellen Slobe – IAL WA Projects Officer (08) 6263 7774 Mobile: 0458 291 643 email: ellen.slobe@irrigation.org.au

Authorised sprinkler testing signs If you are testing a system outside of water rostering hours, as a gardening industry professional, you are not required to register for an exemption with the Water Corporation. However, to promote that you are doing authorized work and avoid a possible infringement, you might like to have a sign clearly displayed at the front of the property. These signs are available from the IAL (WA).

Now available in: Magnetic ($75) GST Exclusive.

All signs approximately 400mm x 300mm.

To download the order form please click here.

2

The Overflow | Autumn 2021

Chairman's Report

From the CEO Bryan Ward

Clinton Hort

Welcome to this Autumn edition of the Overflow magazine.

At the time of writing, Perth and WA have avoided lengthy lockdowns due to the COVID pandemic that has wreaked havoc across other parts of the world. Global news reports are depicting personal heartbreak and severe economic repercussions across the world, giving us some perspective on the relatively mild inconveniences we’ve experienced in Australia, and WA more specifically.

Reports from all sectors of industry are indicating that the irrigation and related green industries have experienced a period of significant growth and expansion. With continuing restrictions on international and occasionally interstate travel, the community is placing increasing value on green spaces in the home and public open space, for recreation and exercise. All Irrigation Australia members in the commercial and domestic space are encouraged to use this period of opportunity to solidify and secure their customer base for the coming months and years.

Early viability questions surrounding industry support of Irrigation Australia’s services at the start of the pandemic have proven to be unfounded, with continued strong support and industry involvement for irrigation training, events and initiatives in WA. As always, members’ feedback and suggestions for the WA Regional Committee are welcome.

Please enjoy the rest of this issue.

Clinton Hort IAL (WA) Industry Chairman

The Overflow is the quarterly publication of Irrigation Australia (WA Region). Articles published are views expressed by the authors. IAL(WA) is not responsible for their accuracy and disclaims any liability which may arise from any person acting on the materials contained within. Editorial content does not necessarily represent the views or policy of Irrigation Australia (WA Region)

Publisher/Editor: IAL WA Region, PO Box 3401 Success, WA 6964 Tel: (08) 6263 7774

Risk assessment when planning for events has taken a new meaning since the unfortunate arrival of COVID in early 2020. We have postponed the Irrigation Australia Conference and Exhibition and ICID 24th International Congress twice now, however we are hopeful that it will proceed in late May/early June 2022 at the Adelaide Convention Centre.

Before this event we have the Waterwise Expo to be held at the Crown Perth Conference Centre on August 25 this year. The response from exhibitors has been remarkable and bookings for the exhibition have exceeded our expectations.

Both events provide a great opportunity for the irrigation sector to reunite after some absence of events due to COVID and there will be excellent opportunities at both events for delegates to learn and acquaint themselves with the latest trends in irrigation technology and learn from industry experts.

IACID, our national committee responsible for the Australian relationship with the International Commission on Irrigation & Drainage (ICID) have promoted the establishment of a Young Irrigation Professionals (YIP) group which is an outstanding initiative to ensure that our next generation of irrigation leaders are provided with the support and motivation to see our industry as a worthwhile career choice. There has been considerable interest in this new group and Patrick Johnson (WA) has been appointed as coordinator supported by Chris Langsford (WA) and Joe Griffiths (VIC). Further details on this group are available on our website or the Young Irrigation Professionals LinkedIn page. We look forward to being inspired by their future contribution to our industry.

Irrigation Australia was asked by the federal Department of Agriculture, Water and the Environment to prepare a proposal for a scoping study into Irrigation Modernisation in the Subarnarekha Region in India. Due to the COVID situation in India, this will be a desktop review and will rely on gathering information from the Central Water Commission in India. This project is similar to one undertaken in 2019 in Lombok, Indonesia and one key reason we have been approached is a recognition that Irrigation Australia has access to a significant network of experts with experience in Australian and international markets.

Finally, as a member-based organisation it is important that we listen to our members and your feedback is very important to us. Consequently, we are resuming the annual member survey and members will receive a link to complete this survey in the next few weeks. We encourage you to take the few minutes needed to complete this survey as this assists the Irrigation Australia Board to guide the future direction of the association.

Stay safe and well.

Bryan Ward IAL Chief Executive Officer

The Overflow | Autumn 2021

3

Regional Update Tracy Martin - National Membership & Regions Manager and Ellen Slobe - WA Projects Officer

Dear Members, Industry Colleagues and Interested Parties, Welcome Members to the Autumn edition of The Overflow.

The year is certainly moving fast and we have already seen signs of winter, with the first rains of the season hitting us recently. As has been mentioned by our Regional Chair, our industry seems to be busier than ever riding on the wave of home owners investing in home renovations and garden upgrades. As an industry, we need to tap into the longevity of servicing, maintaining these investments for our customers.

During the summer season we were fortunate enough to have freedom around COVID restrictions that have not impeded on our activities and we were full steam ahead to host a member event in late March at Curtin University looking at a recent upgrade and discussing the challenges and considerations. Unfortunately, we have had to delay this event till later in the year due to various issues with the site.

More than 50 people attended what was our first event for this year at the construction site of the Baldivis District Sporting Complex in Baldivis. This was held on Wednesday, 12th May and the great turnout continues to show that there is great interest amongst our members for these site demonstrations.

City of Rockingham discussed the Master Plan the Master Plan objectives and bore construction, their design methodology; the construction and installation as well as the system delivery and parameters. We take this opportunity to thank Newground Water Services for sponsoring this event which permitted us to have a larger number of members attend.

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The Overflow | Autumn 2021

2021 Waterwise Irrigation Expo

The 2021 Waterwise Irrigation Expo will be held at Crown Perth Conference Centre on Wednesday 25th August and provides Exhibitors a face-to-face opportunity with the urban landscape industry of Western Australia to showcase their latest irrigation technologies. Exhibition booths have been selling very fast and have in fact all sold, therefore the Organising Committee have decided to forge ahead and expand the tradeshow to meet this demand. We have been able to incorporate another 7 exhibition booths into the floor plan and these are now available for sale.

If your business is interested in showcasing their latest products and services to the wider irrigation industry, then secure one of these remaining booths as soon as possible. This biennial event attracts delegates from all sectors of the irrigation industry including Local Govt Parks & Gardens Teams, Landscapers, Irrigation Installers/Maintainers, Contractors, Retailers, Turf Managers and School Groundskeepers - we are sure the program will have something for everyone working in the industry.

Download the Exhibitor Prospectus and/or secure an booth.

MAJOR SPONSORS

EXHIBITION SPACE ON SALE NOW (due to demand tradeshow has been expanded)

DOWNLOAD PROSPECTUS

WATERWISE IRRIGATION EXPO 2021 25TH AUGUST 2021 Between 7.30am and 4.00pm Crown Perth Conference Centre Gt Eastern Hwy, Burswood

ABOUT THE EXPO The Waterwise Irrigation Expo provides Exhibitors a face to face opportunity with the urban landscape industry of Western Australia.

This biennial event attracts delegates from all sectors of the irrigation industry including Local Govt Parks & Gardens Teams, Landscapers, Irrigation Installers, Contractors and Retailers and Turf Managers.

This event is promoted to these sectors through various marketing campaigns.

The Expo will consist of delegates being assigned to a group for the duration of the day and being escorted to various locations within the Burswood Park Precinct for hands-on field training.

VISIT THIS LINK TO REGISTER YOUR EXHIBITION SPACE AT THE 2021 WATERWISE IRRIGATION EXPO Single Booth Registration https://bit.ly/38Ubtfa | Double Booth Registration https://bit.ly/2LL2HHx 1

The Organising Committee are now focusing on the Delegate program which will cover topics of interest for various sectors of the industry. Delegates will be assigned to a group for the duration of the day and be led by a dedicated tour guide to various locations within Crown Conference Centre for industry expert presentations as well as a field visit to the Burswood Park Precinct.

Ticket sales will be available mid May 2021 be sure to secure your seats quickly.

The Perth Garden & Outdoor Living Festival was deferred due to Covid restrictions, but was held on 6-9th May 2021 and Irrigation Australia was fortunate enough to secure a timeslot in the main program on Saturday morning (one of the busiest days).

Sprinkler Watering Run Times It’s important to remember that different types of sprinklers have different watering run times. The table below can be used as a guide if you need to program your controller.

Approximate watering rate (per hour) Suggested run time to apply 10mm standard drink (for sandy soils)

DRIPLINE

MICRO SPRAY

POP-UP/FIXED SPRAY

ROTARY

GEAR DRIVE ROTOR

15-20mm

35-45mm

35-45mm

10-15mm

10-20mm

30-40 minutes

13-16 minutes

13-16 minutes

40-60 minutes

30-40 minutes

Need expert advice? Contact your local Waterwise Garden Irrigator or Waterwise Irrigation Design Shop for help.

Like our Facebook page for more tips, tricks and promotions.

We engaged TV personality Darren Seinor (also a Waterwise Garden Irrigator) to deliver a presentation on “How much water does my garden need?” This presentation provides us with a great opportunity to spread the 10mm message out to the gardening community as well as showcase and handout the ever-popular Sprinkler Run Time Flyer, to highlight the correct run time for a specific sprinkler.

Waterwise Programs

The Waterwise Programs for the South West have been progressing well with new retail (WIDS) and irrigation contractor (WGIP) members welcomed recently. See the Waterwise Business listings at the back of this issue to see who’s joined all programs since the Summer edition.

6

The Overflow | Autumn 2021

www.waterwiseprograms.com.au

https://www.facebook.com/waterwiseirrigationprograms

The Waterwise Programs continue to be promoted heavily through our social media channels. Waterwise member spotlights are posted regularly on the Waterwise Irrigation Programs facebook page, and regular #waterwise tips are posted to Irrigation Australia’s Twitter account. The “Guide to a Water Efficient Garden” WA Edition has been boosted since its release on 1 September, now reaching more than 88,000 people!

On Wednesday, 21st April 2021 a handful of Waterwise members attended an inaugural exclusive Waterwise member event showcasing an impressive living/green wall in the foyer of the REVA By the Shore apartment building in South Perth.

C

M

Y

Nigel Thomposon (top), Robert Gough (middle) and Paul Officer (above) presenting at the Waterwise member event.

Members were delighted to receive expert insight from Nigel Thompson of Earth & Water, about the various challenges faced and overcome, irrigation considerations and technology utilised for the living walls.

Nigel highlighted the complex nature of irrigation design, installing and maintaining healthy and aesthetic living walls located in an inner-city apartment, with very little natural light.

CM

MY

CY

CMY

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Members can choose to attend any one of three available sessions, either a morning or late afternoon/ evening session. An invitation has been sent directly to members from Water Corporation; please RSVP to the details provided in the invite.

Robert Gough of Hunter Industries showcased the Hunter Hydrawise smart controller technology utilised to schedule irrigation programming with short and frequent applications, while Paul Officer of Netafim demonstrated the Netafim CNL drippers used, which feature an anti-drain and non-leakage mechanism ideal for vertical garden watering to ensure high level uniformity Orbit 2020_HR Products Outlines.ai 1 25/02/2020 of B-hyve waterControllers distribution.

Lastly, all Waterwise members are invited to attend customer essentials training, which will have direct benefit to your business. Research has found positive customer experiences lead to more revenue, growth and trust in a business. The free training has been developed by experts in customer service and business development for Waterwise Garden Irrigators and 8:01:31 AM Waterwise Irrigation Design Shop staff.

The Waterwise Programs are selfstudy, endorsement programs administered by Irrigation Australia, currently in Western Australia and Victoria, for irrigation contractors and landscapers servicing the domestic irrigation market. Exclusive member events are being planned for members of the Waterwise programs, featuring topics of interest to those working in this space.

Anyone interested in finding out more about participating in the Waterwise Programs, please visit: www.waterwiseprograms.com.au, select your location and click on “Become Waterwise” or contact the Irrigation Australia WA office on (08) 6263 7774.

Waterwise planning for the future of groundwater in Cockburn The Department of Water and Environmental Regulation’s (DWER) new Cockburn groundwater allocation plan was launched by Water Minister Dave Kelly in January 2021. The plan was delivered under the Waterwise Perth Action Plan to respond to the impacts of climate change and manage local groundwater levels for wetlands, urban trees and for irrigation of green spaces. Local groundwater is also used for irrigation of gardens and horticulture and for industry.

The Department completed the plan after carefully considering the public submissions gathered in 2018 from a range of stakeholders – including Water Corporation, the cities of

8

The Overflow | Autumn 2021

Cockburn, Rockingham and Kwinana, and the Kwinana Industries Council.

A statement explaining how the submissions were used to improve the plan, was released with the plan.

Climate change means that Perth and Peel now receive less rainfall than we did a few decades ago, and this means less water is making its way into our aquifers, reducing the amount of groundwater we can use sustainably.

DWER Director of Water Planning Susan Worley said the plan sets out how the department will manage and allocate water from the Superficial aquifer in the Cockburn groundwater area, based on scientific

assessment and extensive stakeholder consultation.

“Our groundwater levels are suffering because of the impacts of climate change,” Ms Worley said.

“Responding to this, while supporting the growth and productivity of industry in Cockburn and Kwinana as well as maintaining the health of local wetlands and urban landscapes, is central to the plan.”

The plan leaves water in the ground to protect both the aquifer and the important wetlands, such as the Ramsarlisted Thomsons Lake and parts of Beeliar Regional Park that rely on it.

“By leaving water in the aquifer we can protect the long-term viability of groundwater for use by industry and businesses, as well as for groundwater-dependent ecosystems and other social and cultural values.

Balancing how groundwater is abstracted will minimise impacts on these sensitive and treasured environments,” Ms Worley added.

By working together and rethinking how we interact with water, we can secure our groundwater to help create liveable, sustainable, productive and resilient cities for the long term.

The groundwater allocation plan contributes to achieving the Waterwise Perth 2030 target of 10 per cent less groundwater used across the Perth to Peel region.

“We all have a role to play to transition Perth to a leading waterwise city.”

“A waterwise city is one that has healthy water ecosystems as part of its natural environment and supports community liveability and wellbeing.”

“We are calling on all local groundwater users to become more waterwise and help us to protect our limited and valuable groundwater resources.

You can access a copy of the plan and the statement of response here: https://www.wa.gov.au/service/naturalresources/water-resources/cockburngroundwater-allocation-plan

DWER staff reading a monitoring bore to measure coastal saltwater risk to groundwater

By leaving water in the aquifer we can protect the long-term viability of groundwater for use by industry and businesses as well as for groundwaterdependent ecosystems and other social and cultural values.

The Overflow | Autumn 2021

9

Hope Valley Nursery (Part 2) In the previous edition of The Overflow, we focussed on the initial design brief of Hope Valley Nursery for the development of the Hopeland site. To read the first article, see page 12 of the Summer edition.

The nursery operates on a closed-circuit system, sourcing irrigation water from multiple monitored bores and harvested water from the greenhouse roof spaces and recycled irrigation water. Owners Matt and Andrew Hall have innovative water capturing practices in place and have invested in significant water storage solutions to enable the nursery to operate well within their water entitlements, and avoid reliance on groundwater for a large part of the year.

Irrigation water capture and recycle pits

Each seedling greenhouse features precise climate control with insulated walls, roof ventilation, retractable blinds, fans, fogging, under-table heating and overhead sprinklers.

There are 3 interconnected recycle pits on site which capture the greenhouses’ irrigation water through the floor.

Recycle pit

Under table heating

Filtration system

10

The Overflow | Autumn 2021

Dam 1

Dam 2

The ground profile in the sheds is sand, 100mm compacted limestone and 2 x 200um impermeable plastic layers. On top of this lays an 80mm layer of blue metal and weed matting, acting as a first stage filter.

The irrigation water filters through the weed matting and blue metal, and thanks to the gently sloped ground 0.5% south to north, and 0.3% east to west - the water travels through a series of drains and pipes to a treatment tank via recycle pits.

At the recycle pits, there are a series of collection wet wells with balance pipework connecting to a Grundfos CU362 pump. There is currently one macerating Grundfos pump to further

breakdown any debris collected, capable of operating at 7LPS. When 2 pumps are added as the nursery expands in future, this can be upgraded to 21LPS. The recycle pits feature sensors which trigger the pumping of water from the pit to an irrigation storage tank. It is treated on its way to the storage tank with chlorine dioxide.

Dams for rainwater capture and storage

To maximise rainwater capture, each greenhouse roof collects rainwater via large 375mm downpipes. New sheds currently under construction will feature 450mm downpipes, with a possible capture rate of over 50LPS.

The Overflow | Autumn 2021

11

Water is transported via 450mm pipework to one of the nearby dams.

There are two dams on site to capture and store the harvested rainwater, the second only recently completed in March 2021.

The two dams are linked to enable water balancing across the two, with a Grundfos CU362 pump located on the first dam.

At the moment, the second dam does not have an additional pumping station but has been built with an allowance for this, if required in future.

Each dam is 148m x 25m, with a capacity of approximately 4.2 million litres. Water features are located on each dam for aeration and circulation.

To avoid overflow and flooding during heavy rain events, overflow water can be pumped onto an adjoining pasture.

Rainwater Capture Capacity: • 22,400m2 for future on this run • Water Capture per 3mm/hr rain equates to 67,200KL • Flow Rate of 18.6 LPS Dam pipes

450mm pipe

Pumping station at Dam 1

12

The Overflow | Autumn 2021

Tank 1

The system is also valved with 4 valves: • Valve to tank via poly main (valve to irrigation storage tank) • Valve to water circulation (dam 1) • Valve to water circulation (dam 2) • Valve to freeboard overflow (The weather station monitors rainfall in mm over a set time frame and if that is exceeded it will initiate the valve and dam pump station to pump water out to eliminate overflow into creek).

Tank system storage

There are 2 x 600kL Heritage Tanks with an effective water capacity of 2 x 585kL on site.

Chlorination shed

All water sourced from monitored bores, recycle pits and storage dams is sent through a final Amiad filtration system featuring a 200 micron filter, and treated at the chlorination shed through a Grundfos Oxiperm chlorine dioxide treatment plant at 1.5ppm, producing irrigation water downstream in the greenhouse irrigation system at a safe level of 0.3-0.4ppm, avoiding crop burn. Backflushing functions are fully automated.

Tank 2

The Overflow | Autumn 2021

13

Back to basics: Seasonal adjustment Last year, WA saved over five billion litres of water by switching off their irrigation for winter.

Climate change means it’s more important than ever to save water for when it’s needed most.

We know that in the shoulder months, many of our customers overwater their gardens. Add value to your service and help your customers by reminding them how and when to seasonally adjust their irrigation. And no matter what the season, we’re encouraging customers to switch off their controller when it’s raining.

Time of year

Seasonal adjustment

January–February

100%

March

80%

April

60%

May

Use manually, as necessary

June–August

System turned off for Winter Sprinkler Switch-off

September

Use manually, as necessary

October

60%

November

80%

December

90%

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The Overflow | Autumn 2021

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The abrasion resistant construction coupled with floating impellers and precision cast ends, ensure optimum resistance to wear, making this one of the best pumps on the market for sand handling capabilities.

The ideal solution for an ever reliable supply of water for your irrigation system.

Capacities up to: 22 m3/h -------------------------------------Head up to: 310 m -------------------------------------Power up to: 7.5 kW

1800 LOWARA | xylem.com/au

Supply Shortage of Pinebark Driving Search For Alternative A decline in pinebark availability is reaching a point where it might be non-existent in the next 2-3 years.

A high demand for pine products for construction in Australia is causing a challenging shortage in the landscape market. This demand for building materials has increased since COVID-19, with high levels of housing starts and increased renovation activity. Builders and carpenters are reportedly delaying building or having to search for new materials due to a pine shortage.

The function, utility and reliance that the horticultural industry has on bark materials is also quite comprehensive.

This includes aesthetics (ornament), soilless substrates, synthetic turf infill, landscape applications as well as container mulching.

What can replace this raw material for growing plants in WA?

There has been proven, positive results in America and Europe of growing in composted green waste. If fully composted, tested to meet growing standards of pH and EC, there is no reason why plants cannot grow in this.

16

The Overflow | Autumn 2021

Initial trials in WA set up by Richgro with various notable, respected growers in WA such as Sunnyvale Nursery, Domus Nursery, Supreme Plants and Pinelake Nursery to name a few, have proven very successful.

The results were above expectations, notably, the reduction in water use: 30-50%. And also, being a slightly heavier mix, the additional benefit of not blowing away in traditionally windy WA conditions.

Richgro has specifically designed a Professional Nursery Mix with composted green waste1 and is also investing in a screen to make the particle size of the greenwaste fine enough to use for turf as a top dress in the short term.

David Miles, Sales Manager at Richgro Landscape and Commercial has felt the impact of this pine bark shortage but with the success of the trials with composted green waste says “I am extremely excited for a replacement for pinebark now and can see this move as extremely beneficial for the industry to become self-sufficient and not as dependent on the supply of a material that can be unreliable.

Composted green waste is also much more beneficial nutrient-wise for our WA soils. ”

How Composted Green Waste Helps Soil Structure and growth

The structure of soil is how the inorganic elements such as sand, silt and clay come together with organics like compost and humus. Together, they create aggregates, or groups of loosely composed particles bound by compost and earthworms. This creates a “crumbly” textured soil, ideal for drainage and water retention and is easier to work with. This lightened soil also allows tender young roots to penetrate the surface more easily.

The addition of compost, specifically to soils which are heavily clayed or overly sandy, will result in a healthier overall substructure that allows air to circulate.

Another advantage of using compost is in its prevention of erosion. Compost allows roots to easily spread, thereby impeding erosion. Hand in hand with this, compost also increases the soil’s ability to retain water and decrease runoff by encouraging healthy root systems. A five percent increase in organic material will quadruple the water holding capacity of soil.

• • • •

rapidly than others, in effect becoming a sort of slow-release fertiliser. The greater variety of ingredients in the compost, the greater variety of nutrients will be released. Amending the soil with compost will also neutralise both acidic and alkaline soils, bringing the pH levels to an ideal range for nutrient absorption by plants.

Compost that is predominantly leaf based has been shown to be effective against nematodes, and compost application to grass suppresses a multitude of fungal diseases.

Another benefit is that you may be able to water less frequently. Compost promotes soil water retention, giving the plant more time to "sip" water as it needs hydration. This aids with healthy growth and makes dehydration less likely.

Lastly, composting is cost effective, decreasing the amount of cash outlay for garbage pickup, pesticides, herbicides, fertilisers and the like.

Basically, using compost in the garden is a win-win situation all the way around!

Indoor gardeners also love compost because it usually eliminates the need for chemical fertilisers. If you have used chemical fertilisers on house plants in the past, you may know that these can be tricky to use correctly.

The results were above expectations, notably, the reduction in water use: 30-50%.

And also, being a slightly heavier mix, the additional benefit of not blowing away in traditionally windy WA conditions.

18

The Overflow | Autumn 2021

Decreasing water runoff helps to protect our waters by thwarting pollution from fertiliser, pesticides and general soil runoff.

The addition of compost adds nitrogen, phosphorous and potassium as well as micro-nutrients such as manganese, copper, iron and zinc.

While these micro-nutrients are only needed in small amounts, they are important contributors to a plant’s overall health. Commercial fertilisers are often lacking in micro-nutrients, so compost is an added boon to the health of your plants. As compost rots, some materials break down more

If you don't add enough, then your plants won't experience any benefits.

However, if you add too much, you risk killing or at least burning the plant.

Getting the precisely correct amount of chemical fertiliser into each plant is never easy, and it may leave you feeling like you're playing a guessing game that you're fated to lose.

Quit the game and switch to healthy, all-natural compost. It definitely won't burn or kill your plants, even if you go a bit heavy with it.

1. Composted greenwaste accounts for 50% of the mix, with the other 50% being made up of fine compost and coco peat/sand to ensure the appropriate pH is possible along with salt levels to enable the plants to be grown.

Moving Water Moving Forward MHQP Series

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Fhoton SolarPAK

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VR Series FPS ISO Series

Designed for both industrial and agricultural application.

HWR Series

Wear-resistant pumps manufactured with high-chrome white iron to maximize resistance against destructive abrasives and maintain peak performance in light slurry applications.

VR Series Multistage Pump

Vertical multistage pump booster and pressure system, designed in various combinations to suit, whether it be Industrial, Building Services, Commercial, HVAC, Domestic or irrigation applications.

Ranging from a singular pump system through to a complex 8 piece design.

Vertical multi-stage pumps are available in high- and low-speed models for superior durability, efficiency, and performance in a wide variety of applications.

Drives and protection

Equip a Franklin drive to protect, monitor, and meet the different needs and demands of each application with the same pump.

Bore Hole Pumps

Submersible water pumps, with mechanical seals, designed to repel water from entering the motor. These pumps vary in applications from a standard system for clear waters to an industrial model aiding in the movement sewage and other tougher materials.

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PO Box 4023, Dandenong South, Victoria 3164 A.C.N. 055 492 647 A.B.N. 32 055 492 647

Franklin Electric has over 75 years of experience, providing leading technical service to the irrigation industry, offering support and advice generating a sustainability to keep you pumping into the future.

Berrysweet Farms Bullsbrook

Drippers effective in multiple applications from vertical gardens to greenhouses and nurseries Irrigation Australia recently held an exclusive Waterwise member event at REVA By the Shore apartment complex, showcasing the impressive vertical garden installed in the building’s foyer by Perth’s emerging living wall specialists; Earth and Water.

program, which feature an anti-drain and non-leakage mechanism ideal for vertical garden watering, to ensure high level uniformity of water distribution.

The presentation covered the complexities of irrigation design, installation and maintenance required to ensure a thriving green living wall.

The CNL feature enables the scheduling of very short irrigation events and also maintains irrigation uniformity due to the CNL feature holding the water in the delivery/lateral line after every cycle.

The emitters are compact online pressure compensated drippers, featuring a continuously self-cleaning labyrinth. The anti-drain (LCNL & HCNL – Low and High Compensated Non-Leakage) function eliminates drainage and refill effect, improving efficiency in pulse irrigation. The drippers are available for various flow rates of 0.5, 1.2, 2.0, 3.0, 4.0, 8.0 and 12.0.

Paul Officer of Netafim was on hand to provide expert advice and technical knowledge around the use of the Netafim CNL drippers used in the

20

The Overflow | Autumn 2021

the no drain – the dripper closes at the end of an irrigation cycle at a nominal pressure to keep the poly delivery line charged – thus ensuring all drippers open at the same time in the next watering without the lag time filling laterals, compared with conventional drippers that will completely drain.

PCJ CNL drippers featured in the vertical garden are pressure compensated to ensure all drippers emit the same flow rate over a range of pressures, but the real feature is

Drippers flow rate vs. working pressure In order to calculate the right flow rate of each dripper, under different working pressures, we use the following formula: Q = K * PX

The very shallow growing media for strawberry plants require products like PCJ CNL dripper assemblies accompanied with pulse irrigation scheduling to ensure uniform application of water and nutrients to the plants without excess drainage.

Where: Q = Dripper flow rate (liters/hour) K = Constant (each dripper has his singular constant and must be defined by the dripper producer) P = Real working pressure (meter) X = Exponent (each dripper has its singular exponent and must be declared and defined by the dripper producer) *ISO 9261 require from the manufacturer to declare the constant K and dripper exponent

Vertical gardens deploying PCJ CNL drippers will have drippers with tube and stake at the back of the plant cells, these drippers are installed in layers with varying heights. The PCJ CNL dripper allows short waterings to ensure there is 100% uniformity into these cells without excess drainage with conventional systems.

PCJ CNL drippers enable systems to operate by ‘pulse irrigation’ this is very short watering times (1-2 min) frequently through the day with very high uniformity

Berrysweet Farms Bullsbrook

PCJ CNL drippers are widely used in the commercial horticultural market for the same reasons as above – soilless media, small pots and crops like berries, which require high uniformity, no drainage and the ability to pulse irrigate up to 20 times a day for short waterings.

As an example, Berrysweet Farms Bullsbrook have grown strawberries in the ground for many years, however the trend is moving to 'tabletop irrigation' to increase yield and reduce water and nutrient consumption.

The animation below details the operating principle of the Netafim PCJ Dripper giving an indication of its operation under varying pressure, and its self-cleaning and CNL (Anti-Drain) features.

Replacing worn out or inefficient sprayers can lead to water savings of up to 30 per cent.

Water saving solutions for landscape irrigation

By Gavin Jones, Hunter Industries

SNAPSHOT

• Retrofitting the right product in the right location can bring about significant water use savings

• Product solutions for saving water include: fitting weather-aware controllers, replacing inefficient sprinklers, converting to drip and regulating water pressure

Responsible water use is something the irrigation industry promotes as a matter of course for landscape irrigation. The four key ingredients for maximising landscape water use efficiency are: well-designed systems, products that are fit for purpose and properly installed by certified professionals, regionally appropriate plant choices and informed irrigation operators.

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In this article Gavin Jones looks at some of the savings that can be achieved by using the right product for the right job.

Product solutions for saving water Fortunately, the irrigation industry is well served in having access to effective product solutions and professionals who can advise on and install the right equipment for the job at hand.

sprinklers is the easiest way to see an immediate reduction in water use.

Every system, no matter where it is located, should have a smart controller that delivers water based on local weather conditions. Other solutions include converting small areas from overhead spray to drip irrigation and adding pressure regulation to any system for optimal product performance.

Retrofitting inefficient or old, wornout spray systems with more efficient

Teaming up with manufacturers who make water conservation a top

priority when developing products and providing training and support is more important than ever. Here are a few simple changes to dramatically reduce outdoor water use.

Investing in a water meter, which will measure water use and help detect leaks and broken pipes, is a next step after installing a central control system.

Weather-aware irrigation controllers

✔ Water savings of up to 50 per cent By combining Wi-Fi enabled controllers with compatible web-based software, irrigation professionals can achieve up to 50 per cent water savings for their customers. These controllers allow management of irrigation systems from anywhere in the world at any time via computer or smartphone. Using controllers connected to the internet means that watering schedules based on accurate weather data, including temperature, rainfall probability, wind speed, and humidity can be easily and quickly adjusted.

The next step is to add a flow meter to measure water use and detect broken pipes or sprinklers. Constant monitoring of electrical current flows allows contractors to receive alerts before issues become problems.

Replace inefficient sprayers

✔ Water savings of up to 30 per cent Old, worn out or inefficient sprayers can be the source of poor water use efficiency. A simple upgrade to more efficient sprayers can result in water savings of up to 30 per cent.

Convert areas to drip irrigation

✔ Water savings of up to 70 per cent For medians, narrow landscaping beds and planters, reducing turf and converting from sprays to in-line drip irrigation or point-source emitters can result in water savings of up to 70 per cent. Drip irrigation provides slow, even watering for coverage right where it’s needed, with no overspray onto the hardscape.

emitters, and valves. This saves water lost from misting and runoff.

Other ways to save water

✔ Water savings of up to 50 per cent

Check the system. Inspect irrigation systems for leaks, clogs, wear, and other damage that can silently waste litres of water. At a minimum, adjust sprinkler nozzles to eliminate overspray onto hardscapes.

Install pressure regulators to achieve the optimal pressure for sprinklers,

Modify the space. Be selective with turf areas. Keep turf only where

Slow the flow – regulate the pressure

it’s practical and use a grass that’s regionally appropriate. Replace thirsty plants with native and drought-tolerant plants. Remember to add mulch to reduce evaporation and moderate soil temperature.

The bottom line

By adopting some or all of these solutions, you will see significant savings in water use and play an active role in water conservation for generations to come.

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Turf: a natural sponge for carbon dioxide

By Turf Australia

Photosynthesis in turf

Turf farming relies on the sun to generate plant growth through the process of photosynthesis.

Photosynthesis is turf’s way of converting carbon dioxide from the atmosphere into plant material, using the sun’s energy in the process.

During photosynthesis in turf, light energy is captured and used to convert water, carbon dioxide, and minerals into oxygen and energy-rich organic compounds.

That’s right, the turf you see on turf farms, on our lawns and on our sporting fields are actively removing harmful carbon dioxide from the earth and replacing it with oxygen, improving air quality for all of us.

How the turf industry stacks up

A Hort Innovation strategic levy-funded project, An Environmental Assessment of the Australian Turf Growing Industry (TU16000), studied 30 different turf farms across the country to measure their carbon footprint.

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Each grower studied demonstrated strong net sequestration, meaning every single turf farm was reducing the level of carbon in the atmosphere.

Naturally, with any form of farming there will be some offsets to carbon sequestration from activities like energy and fertiliser use, but the level of carbon the each square metre of turf removes is so high, that it more than makes up for it.

On average, each square metre of turf removes 2.5kg of carbon dioxide from the atmosphere. Even when offsetting energy use on farm, each turf farmer is still 1.6kg of carbon dioxide per square metre ahead!

But it’s not just photosynthesis

Almost every other possible ground cover comes with some form of end-of-life waste disposal problems which contribute negatively to the environment. Artificial materials such as synthetic grass, concrete or asphalt will at some point in their life become worn, torn and unfit for use.

2.5kg The volume of carbon dioxide removed from the atmosphere by each square metre of turf.

When this happens, the materials must be disposed of and as yet, a viable recycling stream is not yet in operation resulting in artificial materials being trucked around and disposed of in landfill, contributing to poor environmental outcomes.

CHOOSE NATURAL. CHOOSE LIVING. CHOOSE TURF.

Turf: a natural sponge for carbon dioxide Improving your carbon reduction Information for growers: Harvest under ideal conditions

By harvesting under ideal conditions, and reducing turf waste, growers will not only increase yields and their own bottom line, but sequestered carbon will improve.

Wasted turf will lose its sequestered carbon during the decomposition process.

You can’t manage what you don’t measure

Efficient use of energy and all other farm inputs will reduce wastage and minimise direct and indirect greenhouse emissions.

The first step in energy efficiency is measuring the current usage of electricity by pumps and diesel in tractors as well as use of inputs like pesticides and fertiliser.

Once you have a baseline, you can aim to reduce.

Turf Australia, PO Box 92, Richmond NSW 2753 T: (02) 4588 5613 E: admin@turfaustralia.com.au

Maximise sequestration capacity

A strong, healthy and dense plant will be able to sequester more carbon than a limp and lifeless plant.

It pays to have the right amount of fertilisers to promote healthy plant growth.

Minimise losses of resources

Every time a resource like water, fertiliser or soil is lost it requires energy to get it back.

By diverting run-off into dams, covering soils and fertiliser with tarps and by using screens to prevent spray drift, you will be running a more energy efficient farm.

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Wharf St Basin Next Generation Community Park Background

Drainage assets have typically been hidden behind fences, and public open space in the local government domain is increasingly rare. This is particularly the case within the Canning City Centre, a Strategic Metropolitan Centre which can accommodate 10,000 new homes for up to 25,000 residents over the next 20 years.

Supported by the Australian Government’s Smart Cities and Suburbs Program, Water Corporation’s Drainage for Liveability program, and the Department of Water and Environmental Regulation, the Wharf St Basin Next Generation Community Park (WSB) project redefines the future of inaccessible stormwater infrastructure in WA. There are many existing stormwater basins within

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the City and thousands throughout the greater Perth metropolitan area.

The majority of these assets are fenced to prevent public access. The opportunity for these drainage assets to be reimagined as public space is significant.

This project demonstrates how to take fencing down from around drainage infrastructure and open it up for community use; how it can improve the community’s connection with water; and how smart technology can enhance enjoyment and utilisation of public open spaces. The project harnesses technology solutions for streamlined operations and maintenance by local government, through the real time open data captured at the site.

Project Objectives

To unlock the potential of a fenced off stormwater basin.

The primary function of the Wharf Street detention basin is to provide flood protection for a portion of the Canning City Centre. The basin, which is part of the Water Corporation’s drainage network, has capacity to hold up to 18,000 m3 of stormwater to protect surrounding areas from flooding. It is approximately 2.5m deep and water levels exhibit a range of around 2m. The basin is rarely (if ever) completely dry and has a pumped outlet to the wetlands surrounding the City of Canning Civic and Administration Centre.

WSB has been designed as a passive park that sits well within the City’s

parks and open spaces network. It provides significant amenity to the proposed high-density development surrounding the site in the developing City Centre. The Canning City Centre Structure plan recognises the necessity to optimise use of existing open space areas, which will need to be highly accessible and provide a high level of amenity. This project is therefore a critical step along the road to the successful regeneration of the Canning City Centre.

To create a multipurpose space that embraces liveability, sustainability and productivity.

WSB improves the liveability and sustainability of the Canning City Centre through application of smart technology solutions which deliver economic, social and environmental benefits for the community.

Redevelopment of the Wharf Street detention basin into a smart park provides opportunities for recreation and education within a piece of drainage infrastructure, whilst delivering improvements to natural systems.

The site was previously inaccessible to the public, being surrounded by a high security fence for 60 years, to intentionally restrict community access. It was prone to poor amenity including rubbish and litter, as well as

The site under construction

poor water quality. The fence limited access in some locations even to the street verge. Weed species were prevalent throughout the basin and a build-up of sediment was leading to terrestrialisation.

To trial new smart technology to improve water management and site amenity.

The innovative approach that was proposed to retrofit and manage the Wharf Street stormwater basin could only be achieved through application of smart technology.

Onsite water quality sensors with remote connectivity provide unparalleled access to information.

Water quality, levels, and climate measurements are recorded to help site managers understand the relationship between external and internal factors.

Fenced off and inaccessible prior to works

The Community’s experience is also innovative as it includes a ‘Living Lab’ and the bespoke Smart Canning app to engage the community in learning about stormwater and urban wetlands.

This includes active participation in the collection and interpretation of water quality data to help people understand the characteristics of healthy or stressed ecosystems, strengthening STEAM knowledge within the community. The Living Lab will also assist park managers to design and maintain public spaces in the future. Instantaneous feedback from park usage sensors will allow the community to ‘vote with their feet’ to inform park managers of their favourite elements and spaces.

To increase the awareness and knowledge of stormwater basins and the impacts on waterways.

Water quality in the Swan-Canning river system has been an ongoing issue for many years and is particularly evident in long-standing urban catchments featuring traditional approaches to drainage design.

In these catchments, stormwater management systems tend to be hidden ‘out of sight, out of mind’ as piped drains, steep-sided open drains, and deep basins behind barrier fencing. These types of systems consider stormwater as a waste-product and provide little or no opportunity for water quality treatment. This project aims to educate the Canning City Centre community about stormwater and water quality through innovative use of technology to monitor and present information about stormwater quality, and facilitate learning about their personal contribution to water quality improvement and its connection to the

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provide ecological linkages important for species health and diversity.

Works commence

health of the Canning River system.

To collaborate with researchers, engineers and government agencies.

Data collected at the site is publicly available through an open source platform managed by the City.

The collaborative approach which underpins the project will ensure that its availability will be widely disseminated. Data is provided in a manner which enhances interoperability. Open source access to information generated at the WSB will enable analysis by researchers and students and increase our body of knowledge regarding the functioning of urban wetlands and community use of public spaces.

Benefits

The Wharf Street Next Generation Community Park improves the liveability and sustainability of the Canning City Centre through application of smart technology solutions to deliver economic, social and environmental benefits for the community.

WSB seamlessly integrates landscape design and technology to deliver an innovative approach to stormwater management. The site will continue to operate as a piece of stormwater management infrastructure, while allowing space for people to relax in, a habitat for wildlife and an education space to learn more about water.

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The project provides social benefits by creating a space which promotes community interaction and engagement. It addresses concerns around open space deficiency in the area by opening up previously inaccessible land to provide the local community with a place to recreate, enhancing opportunities to connect with people and nature. The site facilitates physical and mental activities that promote community health and wellness through multipurpose interaction.

The creation of a green space in this location provides an important linkage between the Canning City Centre and the Canning River. Green linkages are valued by the community as they improve amenity and encourage greater levels of physical activity. They also

Works in progress

This project will improve the quality of drainage water discharged to the Canning River through establishment of native wetland and dryland vegetation. Through the redesign of the basin into a living wetland system featuring, vegetated shallow water zones and islands and integration of locally native vegetation, the basin is expected to provide water quality treatment for stormwater prior to its discharge downstream and into the Canning River. Habitat opportunities have been maximised to facilitate creation of a healthy ecosystem.

Smart infrastructure design maintains the necessary drainage (water quantity) function which provides flood protection to nearby residents, while enhancing ecological outcomes.

Smart design also minimises potential human contact with the water body.

Raised boardwalks, fencing design, and planting layout all help to minimise health and safety risk to site users, while still delivering a sense of connection to water and to nature.

WSB aims to educate the Canning City Centre community about stormwater and water quality through innovative use of technology to monitor and present information about stormwater quality, facilitate learning about their personal contribution to water quality improvement and its connection to the health of the River system.

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The completed site

There will also be significant economic benefits for surrounding residents; the developers of new multi storey apartments; and the City, as a result of the site’s redevelopment into a parkland setting. Based on research findings of the CRCWSC, property values around WSB are also expected to increase.

The Wharf St Next Generation Community Park project continues after delivery of the park itself. This next phase of the project will monitor and assess all the data collected at the park to better understand the impact of the project on public amenity, community usage of public spaces and improve management of water assets - increasing our body of knowledge on the functioning of these complex systems. Project partners at Curtin University are undertaking this ongoing research which will inform decision-making and design for future projects at similar sites in the City and in greater Perth.

Sustainability Outcomes include increased amenity

Embraces liveability

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The design of the basin and surrounding landscape has been developed and delivered with a core requirement to maintain storage capacity; maintain inflow and outflow structures; and consider variable water level in designs, in addition to addressing safety concerns and managing access. These considerations formed a baseline for the project development with an overlay of other, more aspirational, objectives. These objectives included water quality improvement, habitat creation, improved amenity, creation of learning and research opportunities, and innovative approaches to management and maintenance of City assets.

Key environmental issues managed during construction works included sediment control, dewatering control and impact to on-site fauna.

Sediment control and dewatering

were managed in accordance with the DBCA approved Construction Specific Environment Management Plan, with no reportable incidents occurring during the construction period. Fauna management included the engagement of Bamford Ecologists (Bamford) to undertake fauna monitoring and a subsequent fauna trapping program. Prior to construction works within the water body, Bamford trapped and relocated a number of Motorbike Frogs and fish, as well as 43 Western Snake-Necked Turtles. The turtles were temporarily relocated, and were reintroduced to the WSB site following completion of construction activities.

Water quality and amenity is expected to improve over time within the basin and its surrounds through nutrient uptake by extensive areas of newly planted local native vegetation.

These large areas of landscaping with native species add to the City’s increasing natural areas, as guided by its recently adopted Biodiversity Strategy.

This smart project redefines the future of inaccessible stormwater infrastructure in WA. The opportunity for these stormwater assets to be reimagined as blue and green public spaces is therefore significant. This project demonstrates how stormwater management infrastructure can be opened up for community use; how they can be used to improve the community’s connection with water; and how smart technology can enhance the enjoyment and utilisation of public open spaces.

Click below to watch City of Canning's video 'Wharf Street Basin – a next generation community park

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• For measuring of high flow rates • For horizontal or vertical installation • For cold water up to 50° C • For applications where NMI-M10 Pattern Approved water meters are required Available Sizes • 50mm - 300mm (2” - 12”) • Table E flanged inlet/outlet

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Greening along the lines: the multiple values of Perth’s roadside vegetation

By Emma Ligtermoet and Natasha Pauli, The University of Western Australia

Street verges may once have been at the margin of conversations around greenspace, reserved primarily for utilitarian functions like services and footpaths, with street trees included for shade and amenity. However, increasing urban density and declining private greenspace means that the humble street verge is being more clearly considered as an opportunity for urban greening. For example, on major roads, the Wildflower Capital Initiative is showcasing Western Australian plants in landscaping, while on suburban streets, there is a quiet but steady increase in interest among residents for landscaping the verge as a garden. Suburban greenfield and infill developments are also adopting native plants in roadside landscaping.

Street verges are places where the public and private realm meet. The interests of a wide range of streetscape stakeholders overlap and compete in complex ways, but these have not

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been well documented with regard to the transformations underway in many suburban street corridors. Researchers supported by the Clean Air and Urban Landscape Hub (funded by the Australian Government’s National Environmental Science Program) set out to understand some of the values attached to roadside vegetation across community, local government, industry and state government agencies in the Perth metropolitan region.

Our research team interviewed 30 stakeholders across state government agencies, LGAs, the horticulture and irrigation industry, environmental consultants, peak bodies, developers, utilities, and community leaders in verge gardening in Perth (click for full report). The stakeholders were asked about their views on the ecosystem services that were provided by roadside vegetation, the challenges and opportunities associated with verge gardening and

transformation, and changing trends in verge gardening. We also compiled an ‘audit’ of current (January 2021) Perth metropolitan LGA policies on verge gardening and urban forests.

Residents are generally responsible for the maintenance of low-growing vegetation on the street verge adjacent to their residence. In a companion report, we documented the results of interviews with 22 Perth households on their motivations for verge gardening with native plants, and their gardening practices. The report includes details of the most common plants used, as well as a ‘typology’ of verge gardeners. Verge gardeners come from all stages of life, may be homeowners or renters, and selected plants for a wide variety of reasons. Notably, around 70% of verge gardeners in the study continued to regularly water their verge gardens following the first year of establishment.

Top: Streetscape landscaping within Fraser’s Landing development in Mandurah, featuring native and waterwise plants, and on-site stormwater management. Bottom: Perry Lakes infill development in Floreat, featuring low-growing native and non-native species, particularly in front of multidwelling buildings.

Key findings: stakeholder perspectives on native gardens on street verges

Although the stakeholders interviewed had a diverse range of interests and influences over the management of Perth’s suburban verges, in several key areas there was a degree of consensus.

All stakeholder groups recognised that vegetated verges, including those with predominantly native plants, had a significant role in providing a range of urban ecosystem services, including social, ecological and economic benefits.

The proportion of native verge gardening respondents within different categories of watering habits after the first year of plant establishment. Twenty-two households were interviewed for the research.

Respondents collectively ranked the most important ecosystem services provided by the vegetated verge as urban temperature regulation, rainwater infiltration and urban storm water management, aesthetics, plant diversity and recreation and mobility. The provision of food for people from verge gardens was rated as the least important ecosystem service, though this was still rated as extremely important for almost one quarter of respondents.

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Graphic represents the perceived importance of different ecosystem services provided by street verges against a 5-point Likert scale, from all interviewed stakeholders across local and state government, industry, and community (n=30). Ecosystem services are ranked in order of highest mean score (temperature regulation) to lowest mean score (food for people). X-axis denotes proportion of respondents.

Connectivity was a significant factor influencing the potential of the verge to provide ecosystem services. Social benefits could be generated within a street and were supported within neighbourhoods where green corridors encouraged walkability. Ecological benefits are species-specific and require action at a variety of spatial scales to support a diverse range of species.

There has been a recent and rapid increase in metropolitan Perth LGA policies around verge gardens, verge treatments, and urban forests. Two-

thirds of the 31 metropolitan LGAs included in the study have current Urban Forest Strategies, and 29 LGAs have policies around verge gardens.

Of these 29, around two-thirds of LGAs allow residents to install verge gardens without applying for special permission, provided that specific guidelines are followed. There remains considerable variation in verge treatment policies, for example with regard to the area of hardstand that is permitted, whether artificial turf can be installed, and the maximum height of vegetation. A snap shot of the diversity of verge treatment policies is provided below.

The diversity in LGA policy on street verges is also reflected in the wide range of incentives and rebates on offer for residents who engage in verge transformation through gardening (shown below). LGA support on offer may include the provision of information, subsidised native plants, rebates for completed verge gardens, or even complete provision of resources and labour for transforming native gardens for selected residential verges. Verge gardening is still an uncommon practice in Perth. However, interest from residents in verge gardening incentive programs is growing.

Each row in this table represents a different metropolitan LGA. The columns summarise permissible verge treatments as detailed in material available online on LGA websites in January 2021.

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The diverse incentives, rebates and information available to residents from LGAs for residential native verge gardens in Perth. Individual LGAs offer a selection of the above incentives.

In our online survey of Perth LGAs regarding their verge management programs, three-quarters of the 20 LGA respondents expected residential interest in verge gardening to increase in the future.

Stakeholders identified a broad range of challenges and opportunities related to retaining and planting native vegetation along streets. Some of the major constraining factors included the use of verges for parking vehicles, and shrinking available space for planting street trees. Opportunities included the potential use of streetside vegetation for stormwater management, and normalising the use of Western Australian plant species in landscaping and planting. Respondents also acknowledged the need for diversity in streetscapes, integrating trees, turf, and low-growing vegetation for amenity, health and environmental benefits.

gardening is not widely permitted, it has become normalised and embedded within local government policies for the majority of Perth metropolitan LGAs. Verge gardening is also permitted by a number of regional local governments elsewhere in Western Australia, and is supported state-wide by programs such as the Water Corporation’s ‘Waterwise Greening Scheme’. Through investigating the networks of knowledge transfer, our research highlights that the ‘normalisation’ of verge gardening has been prompted by a combination of ‘top-down’ government-based programs intersecting with and complemented

by ‘bottom-up’ community initiatives, sometimes led by influential individuals.

Growing demand from residents has been reflected by the provision of plants and landscaping services specifically targeted at verge gardens by the horticultural and landscaping industries.

The findings of this research are relevant for all urban centres and cities across Australia, and contribute to the growing global interest in greening our cities, as the multiple benefits to humans of living with urban green space become only more apparent.

Perth represents an interesting scenario in the governance of vegetation on street verges – while in many jurisdictions around Australia, verge

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Landholders installing desalination plants have been reminded to lodge a Notice of Intent to comply with Soil and Land Conservation Regulations before commencing operation.

Notice of Intent required to pump desalination water Landholders intending to install a desalination plant on their property are reminded to lodge a Notice of Intent to Pump Water (Desalination) with the Commissioner of Soil and Land Conservation before proceeding.

There has been significant interest in desalination to remove salt from groundwater to produce water suitable for livestock, crop spraying, horticulture irrigation and domestic use and to build self sufficient, secure water supplies.

In the past 18 months, 21 Notice of Intents for desalinisation have been lodged with the Commissioner from throughout the agricultural region.

A Notice is required at least 90 days before pumping commences to comply with Soil and Land Conservation Regulations (1992) to ensure land degradation does not occur as a result of the disposal of saline reject water.

Commissioner Cec McConnell said officers from the Department of Primary Industries and Regional Development would work with

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The Overflow | Autumn 2021

landholders to help them comply with requirements.

negative impacts from incorrect reject water disposal.

“Commercial desalination plants vary in operation but all produce product water that is low in salt concentration and reject water, which has a high salt concentration,” Ms McConnell said.

“We have had some very constructive discussions with retailers so they can make their customers aware of the land degradation risk and the compliance process associated with this significant investment,” Ms McConnell said.

“It is important that when the reject water is discharged, whether it be onto other land, into waterways or waterbodies or re-injected into groundwater, it does not cause damage to the environment, like salinity and soil or water erosion, or negatively affect downstream neighbours.

“The Notice of Intent process includes a visit from one of our officers, who works with the landholder and provides advice on water disposal to avoid land degradation or impacting surrounding properties and crops.”

The Commissioner’s office has been liaising with commercial desalination plant retailers in Western Australia to ensure they are aware of the compliance requirements and the

An online Notice of Intent to Pump Water (Desalination) form can be found on the department’s website and includes questions about feedwater, product water and reject water, in addition to requirements for a plan and consultation with neighbours.

Failure to lodge a Notice of Intent is an offence and may leave landholders exposed to penalties under the Soil and Land Conservation Act. For more information about groundwater desalination on farms in Western Australia, compliance and regulations, the benefits of reverse osmosis systems and more visit agric. wa.gov.au and search for ‘desalination’.

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Certification options and demand for Irrigation Professionals is growing What is Certification?

Certification is the process of providing someone with an official document attesting to a status or level of achievement.

Irrigation Australia’s Certification Framework is a voluntary, national program of industry recognition.

Certification is a designation earned by a person to certify that he or she is qualified to perform a job. Certification indicates that the individual has a minimum set of knowledge, skills, or abilities in the view of the certifying body to perform their job to the satisfaction of water managers and customers.

The Irrigation Australia Certification Framework continues to be recognised within the irrigation industry and the options for Certification disciplines is growing.

• Certified Irrigation Retailer

There are now Eleven (11) Certification Disciplines which includes;

• Certified Meter Installer and Validator

• Certified Irrigation Designer

• Certified Storage Meter Installer and Validator (New)

• Certified Irrigation Installer • Certified Irrigation Operator • Certified Irrigation Contractor

• Certified Irrigation Manager • Certified Irrigation Agronomist

• Certified Poly Welder – Electrofusion (New) • Certified Poly Welder – Butt Welder (New) The Certification Board is also currently working on revamping and reintroducing the Certified Irrigation Assessor Certification so once the training course is ready we will schedule some training courses, so watch this space.

Utilising the services of, or becoming a Certified Irrigation Designer/ Professional guarantees that the person has the knowledge, skills, and expertise of the latest and most advanced irrigation systems, ensuring minimum industry standards are applied which ultimately minimises the chances of poorly designed, installed or maintained irrigation systems.

One of Irrigation Australia's most important missions is to help Australian farmers & water users to upgrade water management efficiency and increase the productivity of every drop of water in the system.

IAL is working towards a future where irrigation systems are: designed by Certified Irrigation Designers, Installed

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The Overflow | Autumn 2021

Why become a certified irrigation professional?

By becoming a certified irrigation professional, you'll be helping to lift the skills, knowledge and standards of the whole industry, which will help the irrigation industry control its own future and become more sustainable. There are personal benefits too. As a certified irrigation professional, you'll gain recognition for your skills and better prospects for your future career.

by Certified Irrigation Contractors or Installers, Run by Certified Irrigation Operators and Managers as well as the provision of product advice by Certified Irrigation Agronomists.

There has been a surge of irrigation stakeholder interest in signing up for professional certification this year, particularly during COVID as the industry builds its performance and underpins its reputation for sustainability and productivity through optimum water resource management.

Certification also grants you a point of difference in the market and a Certified Irrigation Professional is highly regarded by customers to provide a service that meets or exceeds the average industry standards.

For more information about becoming Certified in the discipline of your choice please click on the below link: https://www.coie.com.au/ certification/

AAP SYDNEY info.nsw@aapindustries.com.au AAP BRISBANE info.sqld@aapindustries.com.au AAP MELBOURNE info.vic@aapindustries.com.au AAP ADELAIDE info.sa@aapindustries.com.au AAP PERTH info.wa@aapindustries.com.au

S U P E R I O R A P P L I C AT I O N F L O W GAS

GENERAL PURPOSE

DZR

AAP TOWNSVILLE info.nqld@aapindustries.com.au

www.aapindustries.com.au

Build On Your Professional Development Irrigation Australia’s range of nationally accredited courses and qualifications are designed to provide you with the right skills and knowledge to pursue a career in the irrigation industry.

Take a look at the topics being delivered over the coming months

Join Our Face-to-face & Online Training

Certificate III in Irrigation Technology AHC32419 Duration: 18-24 Months Mode of Delivery: Face to Face & Virtual Classroom Delivery

Certificate III in Irrigation Upgraded Course AHC32416 > AHC32419

Duration: 12 Months Mode of Delivery: Face to Face & Virtual Classroom Delivery

Range of Training Courses 1. Certificate III in Irrigation Technology

7. Urban Irrigation Design

2. Certificate IV in Irrigation Management

8. Commercial Irrigation Design

3. Centre Pivot & Lateral Move

9. IRRICAD Design

4. Introduction to Irrigation | Agriculture

10. Basics in Wiring & Electrical

5. Introduction to Irrigation | Urban

Troubleshooting

6. Irrigation Pumps & Systems

Storage Meter Installer & Validator Includes CSV Certification Duration: 3 days Mode of Delivery: Face to Face

Irrigation Installer Includes CII Certification

Duration: 3 Months Mode of Delivery: Face to Face & Virtual Classroom Delivery

Certificate IV in Irrigation Management AHC41119 Duration: 12-18 Months Mode of Delivery: Virtual Classroom Delivery

Blended Learning

Visit our website for upcoming training dates www.irrigationaustralia.com.au/training

Practical Approach

Industry Expert Qualified Trainers

11/58 Metroplex Avenue, Murarrie Qld 4172 | 1300 949 891 | info@irrigation.org.au | irrigationaustralia.com.au

Water Update

Supplied by the Water Corporation Current graphs can be found at www.watercorporation.com.au

Water Usage Metro Region

https://www.watercorporation.com.au/Our-water/Rainfalland-dams/Water-use

Yearly Streamflow https://www.watercorporation.com.au/Our-water/Rainfalland-dams/Streamflow

Perth Rainfall Comparison https://www.watercorporation.com.au/Our-water/Rainfalland-dams/Rainfall

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HAVE YOU VISITED THE WA WATERWISE PROGRAMS WEBSITE? www.waterwiseprograms.com.au

The Waterwise Garden Irrigator Program is a joint initiative of the WA Region of Irrigation Australia and Water Corporation, with a goal of optimising water-use efficiency of domestic irrigation systems in Western Australia. Endorsed Waterwise Garden Irrigators are fully trained in water efficient practices and can design, install, repair and maintain home garden irrigation systems.

WATERWISE GARDEN IRRIGATORS AAA Irrigation Adonis Gardening & Irrigation Advantage Bores & Reticulation Services All Water Irrigation Allwest Bores & Reticulation B & C Fiorini Pty Ltd Ben’s Garden Maintenance & Landscaping (NEW)

Forever Green Reticulation & Garden Maintenance FPM Landscapes Pty Ltd Garden Solutions Greena Outdoors Greenworx Growing Assets HomeCare Reticulation (NEW)

Beyond Reticulation

Horizon West Landscape & Irrigation

BHG Garden Service

Instant Gardens

Bolesta's Backyard Creations

Irriscape Reticulation & Landscaping

Bowie Irrigation

Jim's Mowing Wilson North

Bradkaz Irrigation

Joel Irrigation & Landscaping

Brighton Reticulation

Landscape Elements Pty Ltd

Brookwell Irrigation

Landscape Works WA

Candid Reticulation Services

LD TOTAL

CHATT Services

Luke's Landscaping Co

Chris’s Landscaping

Meticulous Maintenance Services

Civic Reticulation

Midwest Turf Supplies

Clackline Reticulation

MJ Landscaping

Coast to Coast Irrigation

Mr Retic

Condo Landscapes Pty Ltd

Newground Water Services

Country Landscaping & Irrigation

Nutrien Water – Head Office

Donewell Contracting (NEW)

Olive Branch Landscapes (NEW)

Dynamic Property Solutions

OZ Commercial Maintenance Services (NEW)

Earlybird Landscaping Earth & Water Pty Ltd Ecoedge Retic Supplies Elliotts Irrigation Pty Ltd Evergreen Blades Evergrow Gardenscapes First Element Irrigation

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Rain Maker Irrigation Services Rapid Retic Retic Doctor Retic Express Reticulation Pro Robert Reynolds Softscapes & Reticulation Pty Ltd Superior Landscaping & Reticulation The Garden Fixer The Greenscape Collective The Retic Company The Retic & Landscape Shop The Watershed Water Systems Midland Think Water Dunsborough Think Water Geraldton Think Water Perth TLC Services Perth Top Dog Landscaping and Reticulation Turfed Out Ultimate Blue Pty Ltd Urban Reticulation WA Reticulation Supplies WaterLink Water Well Reticulation

Peel Scape Solutions

Waterwise Landscaping

Perdita Reticulation & Garden Solutions

Westcoast Reticulation Services

Perfect Home Solutions

Wet Frog Retic

Perth Lawns and Retic

WF Landscape Industries Pty Ltd

Plantech Grounds Maintenance

Wild Earth Landscapes

Portworks

Willetton Landscapes

Pretty Blooming Good

Yurra Pty Ltd

Prime Landscaping Pty Ltd

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Pumps N Pipes Supplies

The website features an extensive and up-todate business directory where the community can search for their local Waterwise members, based on their location. Head to the search directory at www.waterwiseprograms.com.au for members’ contact details, or if you’d like information on how to become an endorsed Waterwise business.

With an increasing number of DIY enthusiasts installing and maintaining their own irrigation systems, the Waterwise Irrigation Design Shop Program was developed to raise the standard of irrigation advice and design services offered by staff at counter level of specialist irrigation retailers. Endorsed staff have the knowledge and skills to provide their customers with waterwise advice, products and services.

WATERWISE IRRIGATION DESIGN SHOPS Addwater Reticulation - Maddington

Rainscape Waterwise Solutions - Bibra Lake

Controlled Irrigation Supplies - Joondalup

Reece Irrigation & Pools - Belmont

Elliotts Irrigation Pty Ltd - Greenwood

Reece Irrigation - Canning Vale

Nutrien Water - Balcatta

Reece Irrigation - Malaga

Nutrien Water - Bibra Lake

Reece Irrigation - Osborne Park

Nutrien Water - Byford

Reece Irrigation - Rockingham

Nutrien Water - Canning Vale

The Retic & Landscape Shop- Southern River

Nutrien Water - Greenwood

The Watershed Water Systems - Cockburn

Nutrien Water - Joondalup

The Watershed Water Systems - Midland

Nutrien Water - Malaga

The Watershed Water Systems - Morley

Nutrien Water - Mandurah

The Watershed Water Systems - Subiaco

Nutrien Water - Midvale

Think Water Broome

Nutrien Water - Myaree

Think Water Dunsborough

Nutrien Water - Osborne Park

Think Water Geraldton

Nutrien Water - Rockingham

Think Water Perth

Peel H20 Solutions - Mandurah

WA Reticulation Supplies - Armadale

Pumps ‘n Pipes - Mandurah

WA Reticulation Supplies - Midland

SOUTH WEST WATERWISE PROGRAMS Irrigation Australia has recently launched the Waterwise Irrigation Programs in the South West region of WA, with the support of local water utilities; Busselton Water and Aqwest.

WATERWISE IRRIGATION DESIGN SHOPS

WATERWISE GARDEN IRRIGATORS

Country Water Solutions – Bunbury

ARB Landscaping & Fencing

Nutrien Water – Bunbury (NEW)

Country Landscaping & Irrigation

Nutrien Water – Busselton

LD TOTAL Nutrien Water - Busselton Russell’s Retic (NEW) Zimban Reticulation (NEW)

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