Overflow Magazine Winter 2019

Quarterly Publication of Irrigation Australia (WA Region)

No. 57 WINTER 2019

In this issue Be groundwater wise

Waterwise Irrigation Expo liftout

Cutting edge technology to improve water quality

Irrigation opportunities in winter

Transforming Bunbury's waterfront- Koombana foreshore

Nutrient rich waste water irrigating 2,000 citrus trees (II)

Southern Forests Irrigation Scheme to boost South West businesses

Nutrient Management in the Colder Months The Overflow - Winter 2019

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Contents Be groundwater-wise campaign

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Cutting edge technology to improve water quality and help farmers

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DPIRD gains new researcher in water use efficiency

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Three considerations when selecting an irrigation pump

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

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Nutrient management in the colder months

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Growing with Coco Peat

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Waterwise Irrigation Expo liftout

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Transforming Bunbury's waterfront - redevelopment of Koombana foreshore

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Irrigation opportunities in winter

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Southern Forests Irrigation Scheme to boost South West businesses

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Nutrient rich waste water irrigating 2,000 citrus trees - Part 2

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Plumbers Licensing Board Technical Note excerpt

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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 61, Victoria Park, WA 6979 Tel (08) 9368 3136

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 Paris Lobie – Admin Assistant

bryan.ward@irrigation.org.au geoff.harvey@irrigation.org.au marike.froneman@irrigation.org.au andres.jaramillo@irrigation.org.au chris.delphin@irrigation.org.au kahla.mckinless@irrigation.org.au tracy.martin@irrigation.org.au paris.lobie@irrigation.org.au

Mark Your Diary July 24 & 25 Meter Validation Course August 14 Waterwise Irrigation Expo 2019 20 – 23 Certificate III in Irrigation – Block 2 September TBA Waterwise Smart Controller Workshops 17 Introduction to Irrigation – Urban October 8-9 Commercial Irrigation Design 10 Basics in Wiring & Electrics for Irrigation Systems For further information please visit: www.irrigationaustralia.com.au/events/category/wa-regionevents or contact the WA office on (08) 9368 3136 or ellen.slobe@irrigation.org.au

WA Contact For more details on upcoming courses and events, please contact: Ellen Slobe IAL WA Projects Officer on (08) 9368 3136 Mobile: 0458 291 643 email: ellen.slobe@irrigation.org.au Cover: Optus Stadium. See Waterwise Irrigation Expo 2019 delegates' Prospectus page 16-19.

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 authorised work, 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: Corflute ($25) and Magnetic ($75).

GST Exclusive.

All signs approximately 400mm x 300mm.

For enquires and order form please contact our WA office on (08) 9368 3136.

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The Overflow - Winter 2019

Chairman's Report

by Clinton Hort - IAL (WA) Industry Chairman

Dear Members,

Welcome to the Winter edition of The Overflow.

With some steady rain received this past month, Perth and other parts of WA have experienced the wettest June for more than a decade. However, after an extremely dry month in May, we are still well behind the average rainfall for this time of year.

The “Winter Sprinkler Switch-off” is now in full effect which brings its obvious challenges to Perth residents and to those in the irrigation industry.

Back in 2010, there was extensive consultation between industry, Water Corporation and the office of the Minister for Water when the winter sprinkler ban was introduced as a

permanent water efficiency measure.

Whilst the permanent restrictions mean additional challenges for the industry over the winter months, they are sure to have prevented further significant restrictions which certainly would have had a devastating impact on urban amenity landscapes and our wider industry.

This quiet period is a great time to reflect on the past season and if relevant, conduct a review of your business and where further developments can be made; whether it is with some professional development and training, redeveloping marketing plans, etc.

To assist in this area, the WA Regional Committee and Training

Sub-Committee welcome industry feedback to identify future training needs. Please don’t hesitate to contact the WA Region office to let us know where we can assist you in your business and provide those upskilling opportunities.

I look forward to seeing you at the Waterwise Irrigation Expo on 14 August.

discussions with the water authority to introduce a Waterwise Program in the region.

Tracy Martin, our Memberships and Regions Manager launched a Waterwise program in Melbourne in May and early results are encouraging.

This financial year Irrigation Australia broke all previous records delivering industry training with 43 courses and 551 students, included in this total were 11 Certificate III in Irrigation courses and it's fantastic to see so many people recognising the importance of training. We will start delivery of Certificate IV in Irrigation in this coming year.

There has also been considerable progress with our objective to have a recognised trade qualification in irrigation and we will be providing more information on this at the Waterwise Irrigation Expo in August.

After the Expo we turn our heads to Sydney for the ICID 24th International

Congress to be held in conjunction with Irrigation Australia in September 2020.

This is a very exciting opportunity for the Australian irrigation industry to showcase its technology to a large international audience. This event has been running every three years since 1951 and this will be the first time it has been held in the southern hemisphere.

For more information, please visit the website; https://www.icid2020.com.au/

Clinton Hort - WA Chair

From the CEO Bryan Ward

Dear Members,

Welcome to the July edition of Overflow.

It continues to be a busy time for the Irrigation Australia team, the Landscape Irrigation Conference & Exhibition was held in mid-June on the Gold Coast and now our focus turns to the Waterwise Irrigation Expo to be held at Optus Stadium on 14 August.

The quality and relevance of the topics to be covered at this event appear to be excellent and I’m looking forward to attending.

In my last contribution to Overflow I mentioned the dire conditions existing for irrigators and domestic water users across Australia, unfortunately conditions have not improved since then and Sydney Water have now introduced water restrictions as dam levels continue to fall. South East Queensland water storages are also continuing to fall, and Irrigation Australia is well advanced with

Bryan Ward - CEO

The Overflow - Winter 2019

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

Waterwise Irrigation Expo 2019 This year’s event has gained interest from all over the country and will showcase the latest technologies for the irrigation industry from a vast array of Exhibitors (some new to this event).

With 31 businesses proudly on display, the Trade Show will be buzzing with activity throughout the day - see pg 19 to “Meet Our Exhibitors”.

The latest development for this prestigious event is the opportunity for Delegates to walk out onto the oval at Optus Stadium, something not many of us get the chance to do. Jarrod Hill of Sporteng will be presenting on the challenges faced by the lead designers. Delegates will meet Arena Management staff where they can learn about the ongoing irrigation maintenance required for a premier sporting ground.

The uniqueness of this event is that Delegates rotate consistently throughout the day to participate in educational seminars presented by experts who have been involved with the creation of this state-of-theart facility. To learn more about the presenters and their topics, see pg 18. We encourage all Delegates to ask questions of our presenters and ensure they gain knowledge to take back to their business.

Registrations are now open offering multiple payment options, visit the website https://www.irrigationaustralia. com.au/events/event/2019-waterwiseirrigation-expo-wa-delegates. If you haven’t attended this event previously or for a few years, you might like to consider this as part of your professional development for 2019, Delegate Registration is tax deductible for ABN holders.

Membership Our membership continues to grow every month with new individuals and businesses taking advantage of the member services available to them.

You may not realise that the base membership provides the following

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services, make sure you utilise your membership to its full potential to ensure you get a return on your investment: • Four copies of the Irrigation Journal per annum mailed to your address • Four copies of the Overflow Magazine per annum mailed to your address • Copy of printed annual A4 Irrigation Directory, incl a free business listing • Listing in the business search engine on the Irrigation Australia website • Significant discounts for you (and staff, if applicable) to attend Irrigation Training provided by Irrigation Training Australia (RTO: 91313) • Significant discounts on the cost of IAL Certification Programs • Significant discounts on attending (delegate) or exhibiting at Irrigation Australia conferences and tradeshows • Access to member-only online library of documents including Irrigation System Design Guidelines and Domestic Irrigation Installation Guidelines • eKnowledge Repository - access to our vast range of technical, research and conference papers • Discounts on publications and merchandise • Free job listings on the Irrigation Australia careers page • Discounted advertising in the Irrigation Journal • 50% discount on participation in Waterwise Irrigation Programs Training There are still several training courses to be delivered in WA during the remainder of this year, including Meter Validation & Installation in July; Introduction to Irrigation in September; Basics in Wiring & Electrics and Commercial Irrigation Design (NEW!) in October. See “Mark Your Diary” on the inside cover-page for dates.

The Department of Water & Environmental Regulation (DWER) recently wrote to water licensees in the Gnangara groundwater area reminding

The Overflow - Winter 2019

them that regulations for metering the taking of water will come into effect from 31 December, and directing them to find information on certified meter installers and validators in WA by searching the Irrigation Australia website. If you are interested in upskilling for Meter Validation & Installation (MVI) in readiness for any enquiries that might result, the MVI course will be held on 24th & 25th July 2019, which is the first step in becoming an IAL Certified Meter Installer. Should you have any queries to DWER in relation to the meter regulations, please phone 1800 623 983 and/or email: metering@dwer.wa.gov.au Waterwise The Winter Sprinkler Switch-off is now in full effect for winter. Whilst this means a slower period for industry, it is a great opportunity to undertake some professional development. Dozens of Waterwise Program members did just this when they attended a workshop on the topic of “Plant, Water & Soil relationship” at Richgro in June. The informative session, presented by Certified Irrigation Designer; Clive Croxford, was followed by a morning tea kindly supplied by Richgro and a tour of their innovative facility.

Attendance at these workshops (as well as Expo or any other IAL training courses) qualifies as having completed a re-endorsement activity, required annually to maintain Waterwise endorsement. More Waterwise workshops are planned for later in the year.

Advice has been received from Water Corporation that a Waterwise Controller Rebate will be offered again in 2019, where Perth customers may claim a rebate for the purchase, set up and programming of an eligible weatherbased irrigation controller – available only through members of the Waterwise Irrigation Programs. Further details will be announced when they are available.

Be groundwater wise Groundwater is a crucial part of the water cycle and our natural environment. To help raise awareness of its importance, the Department of Water and Environmental Regulation (DWER) and Water Corporation have teamed up to launch a new education campaign.

The campaign explains how groundwater comes from rain soaking through the soil into aquifers. Contrary to some public perception, aquifers are not underground lakes or rivers, but rock material with enough connected space to store and move water through them.

The education campaign also illustrates how climate change has impacted groundwater sources, with average rainfall in the south west of Western Australia declining by 20 per cent since 1970.

DWER and Water Corporation are encouraging the community to think about what goes on underneath their feet, as groundwater is a shared resource that is under pressure due to climate change and increasing demand.

In fact, almost 70 per cent of all water used across Perth is groundwater.

Find out more about Perth’s groundwater and the education campaign at begroundwaterwise.wa.gov.au Advertisement

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The Overflow - Winter 2019

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Cutting edge technology to improve water quality and help farmers

A series of trials is underway across the South West and Great Southern regions using state-of-the-art technology to reduce nutrient loss off farms and improve water quality in local waterways and estuaries.

More than $5.5 million has been provided by the State and Federal Governments for Smart Farming Fertiliser trials to improve the health of waterways and estuaries by reducing fertiliser run-off, which in turn will help increase farm productivity and profitability.

Cutting-edge technology, including near-infrared and x-ray fluorescence, will be used in conjunction with traditional techniques during the next four years, to measure productivity and nutrient status in soils and pastures, providing more in-depth information.

The importance of trials Run-off from agricultural land is the largest source of nutrients entering estuaries in the South West – which can degrade water quality. The Smart Farming Fertiliser program involves at least 36 fertiliser trials, using seven different treatments on local farms from the Peel-Harvey catchment to Oyster Harbour in Albany.

The trials aim to improve the confidence of farmers and the fertiliser industry in evidence-based fertiliser decisions, matching soil phosphorous requirements with productivity.

They will also test technology to help scientists, industry and farmers more accurately assess soil and plant nutrients and productivity to better support fertiliser application decisions.

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The Overflow - Winter 2019

The science behind the trials The trials were designed and developed by a technical reference group of scientists from the Department of Primary Industries and Regional Development, Department of Water and Environmental Regulation and CSBP, Summit Fertilizers, Western Dairy, Landmark, Meat and Livestock Australia, independent agronomists and Murdoch University and farmer representatives.

Looking to the future All farmers involved will play a critical role in the program and have been closely involved in the establishment of the trials.

Phosphorus is important in farming but there is widespread concern that repeated fertiliser applications are causing phosphorus 'leakage' to the environment which can cause algal blooms in our waterways.

These farm trials will see local farmers work with experts from government, universities and industry, to help improve water quality and save money through efficient use of fertiliser.

Geographe dairy farmer Grant Evans said he was keen to be involved to ensure the science was backed by commercial reality to optimise productivity. “All farmers want to apply fertiliser efficiently and effectively and want to protect the environment,� he said.

The project is funded with $3.26m from the State Government's Regional Estuaries Initiative, Department of Water and Environmental Regulation and Department of Primary Industries and Regional Development; and $2.35m through the Australian Government's National Landcare Program with in-kind support from fertiliser, dairy and beef industry groups.

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The Overflow - Winter 2019

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Photo: Installing soil moisture monitoring gear in a celery crop

DPIRD gains new researcher in water use efficiency Research officer David Rowe (above) has recently joined the Department of Primary Industries and Regional Development (DPIRD) horticulture team where he is working to support growers to increase their water use efficiency with technologies and improved management practices.

With a background in soil science from the University of Western Australia, David brings with him experience from his work in the department’s Land and Water division.

Currently in focus are growers in the North Wanneroo area where the Department of Water and Environmental Regulation (DWER) has proposed a 10% reduction in groundwater allocations by 2028. DPIRD aims to support these growers adjust to the reduction by demonstrating how best practice management and technologies such as soil moisture sensors can improve water use efficiency (WUE).

“Water use efficiency (WUE) is fundamentally about applying only the water required for optimal crop growth and minimising additional water application that may be unnecessary. Using water more efficiently reduces pumping and fertiliser costs, which results in greater returns for the grower, David said.

“From a business perspective, WUE is about returning more profit per unit of water used. This can be achieved by increasing crop yields using the same amount of water, or using less water to grow the same amount.

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The Overflow - Winter 2019

“However, increasing WUE is not without risk as underwatering a crop, even slightly, can have a significant impact on yield or quality. In addition, periodically watering in excess of plant requirements is necessary to prevent the accumulation of salts in the root zone, which can lead to nutrient toxicity and reduce the plants ability to take up water.

Understanding plant water requirements is essential to optimise WUE. Plant water use is determined by crop and environmental factors that can change from one day to the next. Daily pan evaporation multiplied by the relevant Crop Factor (CF) provides a good estimate of how much irrigation should be applied to replace what was used by the crop. DPIRD’s online Irrigation Calculator expands on this calculation and can be used to estimate the total water requirements of various crops.

“An important aspect of WUE is applying the required amount of water to the crop as evenly as possible. Having an irrigation system with high distribution uniformity (DU) reduces dry spots within a crop and allows the right amount of water to be applied to the whole crop in the shortest time. This results in a more even growing crop, reduced pumping and fertiliser costs, and reduced water use.”

This article forms part of a series that will cover the basic concepts of WUE. The next issue will cover the components of plant water use and how it can be influenced through management practices.

Irrigation system assessments As part of supporting growers adjust to the proposed water allocation cuts, David Rowe has been working with Irrigation Australia’s Paul Willmott to conduct irrigation system assessments for growers in the North Wanneroo area.

The assessments focus mainly on the pump and application efficiencies of the irrigation system. Assessment results are provided to growers in a report that rates aspects of their system against industry benchmarks and aims to highlight potential areas for improvement.

Assessments are free of charge and results are confidential.

Growers in the North Wanneroo area interested in undertaking an assessment, please contact DPIRD’s Research officer David Rowe (david.rowe@dpird.wa.gov. au) or Director, Horticulture Science & Industry Development Rohan Prince (rohan.prince@dpird.wa.gov.au)

Photo: Catch cups set up for a uniformity test as part of system assessment

Water use efficiency (WUE) is fundamentally about applying only the water required for optimal crop growth and minimising additional water application that may be unnecessary.

The Overflow - Winter 2019

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Three considerations when selecting an irrigation pump Article by Franklin Electric There are a wide range of pumps that farmers can select from for irrigation purposes. Selecting the right irrigation pump is important for optimising the irrigation process and saving energy and water. Here are three core considerations when selecting an irrigation pump to ensure you are getting the right pump for your system and needs.

Pump size One of the common causes of increased energy usage and costs is using an incorrectly sized pump.

It is important to select a pump that has been correctly sized to meet your exact needs, as this will ensure the best energy efficiency and least energy wastage, and it will have optimal lifespan and reliability.

However, it is not uncommon to see farmers using an incorrectly sized pump. One of the main reasons is that during the pump selection process and the design stage of an irrigation scheme there is often an overestimation of pump duties.

Malcolm Eyre, Managing Director at Franklin Electric, said both under and over sizing a pump can cause efficiency losses and possible damage.

“The major problem with using an undersized pump is that a system’s water efficiency is reduced. Oversized pumps, on the other hand, not only incur additional installation costs due to their size, but they will consume more energy than required and will need more frequent maintenance.

“If you’re unsure what sized pump to get, or think you might have an under or oversized pump, it is important to get in contact with the distributor or manufacturer. Reputable manufacturers will have a team of highly-skilled and knowledgeable engineers that can help you determine the best sized pump for your irrigation system or to give advice about the best course of action if your current pump is the wrong size.”

Powering the pump Another key consideration is the power source for the pump.

Traditionally, diesel or electricity supplied from the grid have powered pumps on farms.

For farmers living in remote locations without access to the grid, a diesel-powered pump is required. However, for those in areas with access to the grid, an electric pump will be the best option as it is more energy efficient than a diesel pump and requires less maintenance.

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The Overflow - Winter 2019

“The big downside for both diesel and electric pumps is that the cost of these fuels is increasing, and it is impacting on irrigators’ bottom line, especially in areas experiencing drought. “There is a different option now available for farmers who want a long-term lower cost alternative.

“Solar pumps are a great option for irrigators wanting to reduce fuel costs while still maintaining an efficient system.

With their steady increase in popularity, the price of buying a solar pump is no longer a hinderance.”

Malcolm said an advantage of using solar pumps is that they can also run when there is limited sun exposure if they are integrated with diesel or electricity to maintain a constant power supply.

“Running a hybrid solar pump gives irrigators the ability to run the pump when there is less sun or at night, while still providing considerable savings on energy costs. And for those running a diesel pump, less maintenance will be required so there is an additional cost saving there as well.”

Water source It is also important to consider the water source that the pump will be drawing from such as surface water, groundwater or a combination of the two.

Surface water can include the use of reclaimed water, or water drawn from lakes, reservoirs, rivers or canals.

Groundwater on the other hand is drawn from underground aquifers through a well. Aquifers can be located at varying distances from the surface, ranging from shallow to several hundred metres down. Special deep well pumps may be required to lift the water and pressurise it.

For groundwater needs, both submersible and vertical turbine pumps can be used. These pumps are very similar as they will often use the same components for pump ends or hydraulic parts, however where they differ is the type of motor used with submersible pumps using a wet motor and vertical turbine pumps using a norm motor.

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Nutrient

Management in the colder months Article by EZ-FLO Australia It’s not surprising that most people think winter is a period of total dormancy (i.e. hibernation of plants) and that nothing needs to be done to maintain plants. Water restrictions in WA seem to reinforce this, but these restrictions are in place to build up reserve and conserve water in a period of lower growth and evaporation losses, not because of so-called dormancy.

Whilst the plant may look forlorn and unhappy due to lower temperatures and growth, the picture is very different below the surface. There the rhizosphere (i.e. the roots) are alive and the associated soil biology, such as fungi and microbes, are busily preparing for the warmer months, assisting in building up carbohydrates, and consuming dead plant material (cellulose).

Fungi are the main contributors to increased soil carbon content, which in turn contributes to decreased water consumption, so assisting them in the colder months to prepare the soil for the time irrigation is required to retain plant turgor. So healthy and well-fed fungi have positive outcomes for the plant.

When discussing nutrients, we think primarily of applying any of the 16 macro and micro nutrients essential for plant growth.

But winter is not the time to apply certain nutrients in excess, such as Nitrogen. Winter is a time to apply the other valuable resources like Kelps and Seaweed products that contain Potassium but insignificant levels of Nitrogen and Phosphorus. These are jam packed with other compounds that can improve both soil and plant health to name just a few: • Amino acids • Alginic acid • Complex carbohydrates • Vitamins • Trace elements Natural, organic inputs like the kelps will contribute to: • Enhanced growth, fruit quality and yield • Increased nutrient uptake • Better resistance to disease and pest attack • Improved response to stress - either transplant, cold or heat • Increased soil water retention • Promotion of beneficial soil microbe growth • Increased chlorophyll content of leaves • Increased seed germination

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The Overflow - Winter 2019

Applying kelps through the irrigation system is an economic and efficient method so building this into a program prior to water restrictions or immediately after are a good way of preparing for the summer months.

Remedial application of kelp products with portable “fertigation” equipment onto severe wear points on ovals, parks etc. by hose is a possible option to consider during the restrictions.

Kelps, like oils, are not alike. Check the label or the product website and select products that are not manufactured using heat or caustic substances. It is essential that kelp is not structurally damaged and that especially the Alginates and Gibberellins are present in their original form.

Kelps can remediate problems that influence root growth and development but other factors such as soil pH, fertilising practices, salt concentration, use of herbicides, disease etc. need to be addressed using other nutrition management practices in conjunction with Kelp. Regular soil analysis, leaf analysis, knowing the irrigation water quality, soil structure are all major points to continually check and rectify.

Soil moisture level maintenance through the build up of soil carbon together with the application of organic wetting agents containing kelp will develop an actively growing root system, which in turn will allow more resilient plants that can take advantage of deeper soil moisture and when surface moisture is depleted, in dry periods. Note that roots do not seek water, but rather grow more vigorously and proliferate where water is available.

Carbohydrates are used by plants for energy and growth and are the true plant food made by plants themselves through photosynthesis, a chemical reaction in leaves involving water, carbon dioxide and light energy. This assists in the build-up of carbohydrates in autumn/winter when they are made quicker than used, and assists the plant in spring when carbohydrates are depleted fastest.

Winter: a time to sleep in and manage plant growth ready for spring.

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- Craig New, Nedlands council. Parks Coordinator (Irrigation).

The Overflow - Winter 2019

13

Growing with Coco Peat

Above: Coco Peat finished product on site

Article by Richgro Richgro have been using Coco Peat for over 20 years and seen an increase in demand for the raw material because of its huge benefits and flexibility of how it can be used.

Richgro's Coco Peat is sourced from Sri Linka because of how clean and consistent the supply is. The product is totally organic but is treated on arrival into Australia to make sure it is free of pests and diseases.

The raw material can be supplied in two ways: In 25 litre bags or loose in bulk. Richgro uses a state-of- the-art machine where blocks are placed at one end, watered, broken up and ready to use within a few minutes; all fluffed up and of the right moisture content. Coco Peat is added to potting mixes and landscape mixes for various reasons:

• Excellent water holding capacity and easy to ‘re-wet’, far superior to ordinary peat; • Unique ability to hold onto nutrients for longer than most normal raw materials because it doesn’t leach like other landscape soils and potting mixes; • Supplied with a neutral pH and EC (Electrical Conductivity) • Odourless, lightweight and uniform • Generally considered to produce stronger root growth, with all the fibrous finer roots able to hold onto water and nutrients much longer and as required; • Ideal use in pots or garden beds because it does not readily shrink when extremely dry or over wet. Hence, less need for wetting agents; • No pests, weeds or diseases when well sourced.

Nurseries such as Plantrite Nursery and Domus Nursery have used Coco Peat mixes successfully and have done for a long time. BCL contractors also used Coco Peat underneath the turf for the new West Coast Eagles training facility.

Applications where Coco Peat can be used: • All types of potting mixes, seedling mixes and native mixes; • Hydroponic growing media; • Underlay for lawns at sporting ovals, golf courses and AFL surfaces; • In breeding grounds for worms in garden and landscape areas; • Amending clay soils and improving sandy, gutless soils; • Many other horticultural areas such as fruit and vegetable growing, flowers and all garden type areas.

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The Overflow - Winter 2019

Above: The Richgro coco peat machine ready and the bales of Coco Peat.

• • • • • • •

The Overflow - Winter 2019

15

MAJOR SPONSORS

WATERWISE IRRIGATION EXPO 2019

DELEGATE PROSPECTUS

14 AUGUST 2019 TH

BETWEEN 7.30AM AND 3.45PM OPTUS STADIUM, 333 VICTORIA PARK DR, BURSWOOD

This year’s Waterwise Expo will consist of a trade show and rotational educational seminars. The seminars will consist of several groups visiting various locations within the Optus Stadium on a rotational basis throughout the day. Each group will have a dedicated tour guide to escort participants to each location, and an industry expert on hand to discuss the specific topic(s) and infrastructure.

Exhibitors and delegates will both benefit from an allocated time slot within the trade show for each group to engage with industry suppliers and see the latest technologies on show.

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The Overflow - Winter 2019

SEMINAR PROGRAM 7.30AM 7:45AM 8.05AM 8.20AM 8.40AM 8.50AM 9.00AM 9.45AM 10.15AM 11.15AM 12.15PM 12.45PM 1.45PM 2.45PM 3.45PM 4.00PM

WELCOME: IRRIGATION AUSTRALIA, WA REGIONAL CHAIR – MR CLINTON HORT IRRIGATION AUSTRALIA, CEO - MR BRYAN WARD MINISTER FOR WATER - HON DAVE KELLY DEPARTMENT OF WATER & ENVIRONMENTAL REGULATION, DIRECTOR GENERAL – MR MIKE ROWE WATER CORPORATION, CEO – MR PAT DONOVAN UPDATE ON IRRIGATION TRADE / APPRENTICESHIP / SKILL SETS – IRRIGATION AUSTRALIA, CEO – MR BRYAN WARD PLANNING AND DEVELOPMENT OF SPORT AND RECREATION FACILITIES: SPORTENG, MANAGING DIRECTOR – MR JARROD HILL MORNING TEA ROTATION GROUPS COMMENCE – ROTATION 1 ROTATION 2 LUNCH ROTATION 3 ROTATION 4 ROTATION 5 PRIZE DRAW / CONCLUSION OPTUS STADIUM TOUR (1 HOUR GUIDED TOUR – OPTIONAL EXTRA)

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15.00 +GST

$

975.00 +GST

15.00 +GST

$

The Overflow - Winter 2019

17

TOPICS TO BE COVERED:

OPENING CEREMONY:

1. MAIN PLAYING PITCH:

JARROD HILL, SPORTENG The site for Optus Stadium contained areas which experience vertical and horizontal ground movements due to the nature of the underlying ground. Jarrod will present in detail on the challenges faced by the lead designers for the project fields of play: main oval, community oval, practice wickets and the drop-in wickets. He will discuss the playing surface profile, the predicted ground movement, and the preferred design option for the cricket wickets (drop-in wickets) for the main area. Jarrod will lead delegates down onto the Oval to view the pitch, see the irrigation system in operation and have the opportunity to ask questions related to the irrigation design.

2. IRON FILTRATION WASTE MANAGEMENT &

MINISTER FOR WATER – HON DAVE KELLY, MBA

ENVIRONMENTAL CONSIDERATIONS: PAMELA LEE, AURORA ENVIRONMENTAL

The iron filtration unit at the Optus Stadium is capable of removing iron for 15 hours of bore operation, after which a backwash cycle is required. Each backwash cycle produces approximately 120 kL of water with concentrations of iron ranging between 200-235 mg/L, and an estimated 4,000 kg of iron ‘sludge’ will be produced each year. Groundwater beneath the stadium site is quite shallow and the proximity of the Swan River means that the water and solids produced by the iron filtration backwash cycles needs to be managed in an environmentally sound and sustainable yet cost effective way. Pamela Lee from Aurora Environmental will present some of the design considerations and environmental constraints associated with the backwash management system constructed at the stadium, which has turned what would be waste into resources.

DEPARTMENT OF WATER & ENVIRONMENTAL REGULATION – MIKE ROWE, DIRECTOR GENERAL

3. LANDSCAPE PRECINCT – DESIGN & ITS

COMPLEXITIES: HANNAH GALLOWAY, HASSELL Hannah will present the story of the making of Stadium Park, exploring how this city scale parkland was conceived, planned, designed and delivered. This presentation will explain how a degraded site on the eastern fringe of Perth City Centre has now been healed both environmentally and culturally to create a new landmark for the city, initiate a shift towards sport and recreation, and celebrate the natural environment in the east.

4. INTEGRATED WATER MANAGEMENT, SMALL

CATCHMENTS, LANDSCAPE AND PASSIVE HARVESTING: MICHAEL SMIT, RAINWATER HARVESTING AUSTRALIA

WATER CORPORATION – PAT DONOVAN, CEO

We know there is a lot more to irrigation than just adding water. Plants thrive in a complex and inspiring ecosystem of soil, microclimates, topography and a water context. Water can be sourced from the sky, a dam, groundwater and municipal systems. How the plants perform with that water provides a world of opportunity in application, managing flows through shaping the land, storing water in tanks and soil and understanding how plant roots interact with bacteria and fungi in the soil. The presentation is informed by the American Rainwater Catchment Systems Association, some important Australian practitioners in this space, and soil research.

5. WHAT GOES INTO CREATING AN IRRIGATION DESIGN?

CLIVE CROXFORD, CID

Irrigation design is not fully understood by those on the ground – it is not simply lines and dots. This presentation will discuss the impacts of changes and effects on other components when design changes are made during installation and maintenance phases.

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The Overflow - Winter 2019

SPORTENG - JARROD HILL, MANAGING DIRECTOR

MEET OUR EXHIBITORS

The company’s commitment to holding large stocks of quality products, together with providing on-time deliveries and a premium level of marketplace.

With 50 years of expertise in segments of water intake, transfer and distribution.

Desalination to water and wastewater treatment in municipal, industrial and irrigation sectors.

With a wide range of Filtration technologies plus air and control valves, Amiad Water Systems provides quality water filtration solutions to meet your irrigation needs.

Antelco is an Australian manufacturer that produces fitfor-purpose irrigation products for home owners, landscapers and agricultural markets to promote responsible water use worldwide.

Owned & operated in WA, APT Water are an established pump company specialising in the design & supply of domestic through to industrial-grade pump systems.

Aquamonix is an Australianowned innovator providing intelligent management of water resources. We provide products and solutions that measure, monitor and manage critical irrigation infrastructure.

ESS is an Australian manufacturer/importer of environmental products including soil moisture/salinity profilers and land mapping both portable and fixed location.

EzFlo is dedicated to providing effective and easy fertigation technology that comes in a range of sizes to suit a broad range of applications.

The FLOMEC ultrasonic flow sensor provides market-leading precision in controlling water application in low flow drip irrigation systems as well as higher volume installations.

Established in 1962 to support the Australian water industry, Franklin’s are a leading global provider of complete water and fuelling systems servicing all sectors.

Grundfos is one of the world’s leading pump manufacturers.

We have been providing quality pumping solutions to customers throughout Australia since 1980.

Heritage Water Tanks provide high-quality and reliable water harvesting and storage solutions throughout Australia, using high-quality, fit for purpose Steel-Liner tanks for your industry.

HR Products is Australia’s leading distributor and largest wholesale, import and manufacturing supplier of quality irrigation equipment for both commercial and domestic use.

Hunter produces an extensive range of water-efficient products for residential and commercial use, including pop-up geardriven rotors, sprays, controllers, valves, sensors, and central control systems.

Australia’s largest independent irrigation and water consultancy.

Taking pride in 34 years of providing the best water resource solutions and highest quality consultancy services.

Kingspan are a market leader and trusted source of expert advice in rainwater harvesting and storage solutions for the residential, commercial and rural sectors.

A leading Australian distributor supplying a combination of technically advanced products, along with extensive industry knowledge for the municipal, landscape, golf, agricultural and mining industries.

Netafim™ is the world leader in smart irrigation solutions for a sustainable future.

Netafim’s Drip Lines are manufactured in Australia and are ISO 9261 compliant.

Parkland Australia, we specialise in smarter cleaner irrigation automation technology to the Sports Turf, Municipalities and Agricultural markets for developing a more sustainable future.

Celebrating 90 years of manufacturing compression fittings and valves right here in Australia. Products designed for the irrigation industry, Australian tough for Australian conditions.

Pioneer Water Tanks Leading the way in water, superior technology, fresher water, and over 30 years of proven performance.

The global leader in irrigation for over 85 years, Rain Bird produces products for residential and commercial applications, including controllers, valves, sprays, nozzles, rotors, etc.

With 38 dedicated branches across Australia, Reece Irrigation & Pools offer specialised service to irrigation contractors, landscapers, gardeners, pool builders and pool maintenance professionals.

Proudly Australian family-owned and operated since 1916, supplying high quality growing media, landscape soils, mulches, organic fertilisers, turf mixes and specialist products.

Australian manufacturer of commercial irrigation control systems for landscape and agriculture. Fast, reliable cloud-based irrigation software and mobile apps with patented two-wire technology.

Data-based insights for irrigation and nutrient decisions. Optimise resource usage, reduce costs and protect the environment.

And make your life easier.

Toro Australia is a leading supplier of reliable, innovative and proven irrigation products. With over 100 years of global experience, you can count on Toro.

Professionalism. Integrity.

Innovation. If these are important to you, Total Eden is the right choice. Come and talk to the experts in the water business.

With over 120 years’ experience and nationwide service, we support the civil, industrial and irrigation sectors with an innovative and comprehensive range of specialised products.

VISIT THIS LINK TO REGISTER FOR THE WATERWISE IRRIGATION EXPO 2019 https://www.irrigationaustralia.com.au/events/event/2019-waterwise-irrigation-expo-wa-delegates

The Overflow - Winter 2019

19

Transforming Bunbury’s Waterfront – Article supplied by the City of Bunbury

Photo: Koombana foreshore, Bunbury

NETAFIM DRIP SMART WATER USAGE

TECHLINE™ AS XR SUPERIOR DRIPPERLINE SOLUTION

DRIVING CHANGE WITH PRECISION IRRIGATION TECHLINE AS XR

Emitter is infused with Copper Oxide to mitigate root intrusion (XR).

Prevents contaminates from being drawn into the dripper (AS).

Precise and equal amount of water being delivered over a broad pressure range.

TurboNet™ labyrinth assures wide water passages and improves clogging resistance.

P 1300 307 407 W www.netafim.com.au

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The Overflow - Winter 2019

the redevelopment of the Koombana Foreshore A collaborative approach from key Government and local stakeholders has recently transformed Bunbury’s stunning waterfront, including the popular Koombana Bay Foreshore.

The redevelopment has been the largest major project in Bunbury for a number of years and it has transformed a prime but somewhat under-utilised waterfront location to a vibrant community and tourism hub.

Key improvements to the iconic seaside location include; the construction of 100 extra parking bays, improved traffic access, a pedestrian promenade along the beach and improved beach access including disabled access.

Beach matting, beach wheelchairs, along with the accessible barbecues, drink fountains and picnic tables have all been added, allowing the popular spot to be accessible to all.

Additional facilities include a revamped kiosk and public amenities, construction of an inclusive playground and the now symbolic Wardandi Boodja; a more than five metre steel bust sculpture representing the Noongar families of the region.

The iconic foreshore holds a variety of events throughout the year including Australia Day Skyfest celebrations, cultural and community festivals, concerts and sporting events.

Visitors are able to access free Wi-Fi at the popular precinct, 24 hours per day, seven days per week from the amphitheatre to the playground. Aesthetically, there has been extensive landscaping overlooking the beach, the installation of an amphitheatre and shaded areas and removal of the old train line.

The foreshore’s irrigation system is connected to the City’s Rainman Central Control System (CCS) which allows the system to be remotely monitored from the Works and Services Depot in Picton. The Rainman controller on site sends critical information on the performance of the irrigation system in real time to the cloud hosted Central Control System.

This allows staff to monitor the system to ensure it is operating efficiently and promptly identify any potential maintenance issues. The system will also automatically shut off during significant rain events or in the event of a major failure.

The system allows the City of Bunbury to set an annual water budget for the site and accurately monitor water usage throughout the year to ensure compliance with ground-water licence conditions. Having an effective Central Control System is an integral tool for managing the City’s irrigation systems and ensures our ground-water resource is managed in an efficient and sustainable manner.

Article continues next page

Thinking Reticulation & Water Management Systems...

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The Overflow - Winter 2019

THINK WATER PERTH: P (08) 9256 6503 | E sales@twperth.com.au | 27 Bannick Court Canning Vale WA 6155

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Recently, four additional sites have been added to the Rainman Central Control System and there is now a total of 32 sites across the City connected to the system.

With the profile of the area being raised to such a high standard, the ongoing maintenance of the various aesthetics is paramount for the City of Bunbury.

The widespread landscaped developments and newly constructed playground area are irrigated by the filtered water from an Elliotts Iron Filtration System.

The Iron Filtered water reticulates the length of the foreshore with the filtered water bringing the iron concentration of the bore water down to below 0.1ppm with a flowrate of up to 65m3/hr.

The amazing results from the Elliotts filtration system has contributed to the beautiful landscaped scene of lush gardens, clean paths and sweeping views, attracting locals and visitors to simply relax and enjoy in the surroundings.

As a result, shortly after completion the City of Bunbury along with global development leaders Cardno (WA) Pty Ltd were honoured with the Park of Year award for the multi-million dollar project at the Parks and Leisure WA Awards of Excellence for 2018.

The award celebrates and promotes vibrant, successful, well designed and managed new or significantly revitalised parks and open spaces, rewarding exceptional examples of best practice in terms of design and management.

Following on from this, in March 2019 the project was also recognised with an award for Annual Achievement at the Australian Coastal Awards, acknowledging the project’s significant contribution to the Australian coastal environment, settlements and sustainability.

A key feature of the greater redevelopment project was the installation of the Koombana Footbridge to provide a connection between the popular foreshore and Bunbury’s CBD. The world renowned Dolphin Discovery Centre has undergone a spectacular $12 million development to the east, whilst a significant commercial and residential development to the west of the Koombana Foreshore is taking shape and is due for completion later this year.

Each of these projects has contributed to a transformation of Bunbury’s waterfront that will continue to prove a major drawcard for the region.

Below: Bunbury's foreshore at dusk

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The Overflow - Winter 2019

Irrigation Opportunities in Winter

Article by HR Products

With winter comes the opportunity to address irrigation operational issues experienced through the season. Some of these issues may include broken wiring or poor wiring condition, faults in wire joints, controller issues, hydraulic problems and sprinkler /emitter efficiencies.

capacity. This process involves simply powering an interface from any controller (conventional or two-wire) and then sending a wireless signal to field which can fire an infinite number of valves with the same serial programmed into receivers.

An investment for the upcoming season and good practice is time spent in asset location with the use of cable location equipment. The marking of those assets with ball locators or at least GPS co-ordinates and the metering of wire paths for their current condition against historical as a comparison of wiring condition will also be very helpful.

This technology allows activation of valves in a turf valve box or an agricultural pole mount for field applications and also two-way communication for remote pump activation and water meter readings back to a controller.

There are some very cost-effective wireless solutions now available to either co-run on a system or to totally replace ageing wired systems as faults arise moving forward.

Wireless Radio (such as the Gator Radio Control system available from HR Products) is resurrecting old systems and even allowing the expansion to existing systems without the headache of trenching new wiring. All can be used with an existing controller or an auxiliary controller of any brand and

A site survey is completed with the ability to cover distances of 2 kilometres and more using repeaters. The system also allows spare stations on nearby controllers to pull in streetscapes, other roundabouts and even into central systems. The wireless technology can also be partnered with the latest web-based controllers.

Make the most of the quiet season to speak to your local representatives for assistance with cable tracking and marking of assets, as well as the new technology options assisting with the management of your sites.

SMART IRRIGATION Landscape & Agricultural

Galcon GSI Controller

Gator Radio Control

Gator Hydraulic Valve

WIRELESS IRRIGATION CONTROL CONVERTING EXISTING MANUAL SYSTEMS TO AUTOMATIC

With the use of the Galcon GSI and Gator Radio System you would no longer need to run cable to the field valves.

The Gator System transmits a radio signal up to 3km away to the Field Receivers to activate DC latching coils and therefore the valves...

What could be simpler?

WATER SAVING Orbit B-hyve™ Controller

Hunter Hydrawise™ Controller

www.hrproducts.com.au

The Overflow - Winter 2019

23

Southern Forests Irrigation Scheme to boost south west businesses For farmers across WA’s south west, the rains can be unpredictable, for them, a reliable water source is the key to their success and longevity.

Unless you are from Manjimup or Pemberton, located in WA’s Southern Forests region, you would be forgiven for not having heard of the Southern Forests Irrigation Scheme (SFIS). The scheme is a plan to deliver a reliable, good quality source of water to local farming properties in the region by constructing an offstream dam and pipeline network.

The Southern Forests region is home to one of Western Australia’s most significant horticultural production areas and the scheme, which will future-proof the region for years to come, is a direct response to the threat of a drying climate.

The Chairman of the Southern Forests Irrigation Co-operative, Harvey Giblett, believes the project will generate benefits for the whole community.

“This scheme will transform the future of farming in our region so that we can protect it and ensure it's viable for the next generation and the next one after that.”

The proposed scheme involves the construction of a 15GL dam located on Record Brook, a tributary of the Donnelly River and a 250km pipeline distribution network to supply water to farmers. It will draw water from the Record Brook catchment and the forested areas of the Upper and Middle Donnelly catchments pumped during peak winter flows from the Donnelly River to the dam.

A weir utilising a natural rock bar will be strengthened on the Donnelly River to enable pooling and gauging of water to ensure that pumping to supply the Record Brook dam is strictly controlled and ensuring the river’s natural flows are not interrupted.

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Origins of the scheme To understand the need for the scheme, it’s important to look to the region’s history. In 2010, the Manjimup and Pemberton areas experienced their driest year in recent history. Two years later, the Department of Water and Environmental Regulation (DWER) released its Warren/ Donnelly Allocation Plan. Under the plan, allocation limits for water licensing were reviewed for all sub-catchments.

The plan identified the status of water availability for licensing as of December 2011 based on licenses issued at the time.

This included identifying that the Upper Lefroy sub-catchment was fully allocated, while Manjimup Brook, Smith Brook, and East Brook sub-catchments had limited water available.

Over time, this has led to many of them being fully allocated as applications for water were assessed. High demand sub-catchments such Upper Lefroy, Smith Brook, East Brook and Manjimup Brook have since been fully allocated before or shortly after the plan.

Since then, modelling from the CSIRO and DWER has shown that, due to climate change, the situation is expected to worsen and more sub-catchments could become fullyallocated. DWER has indicated that once a sub-catchment is fully allocated, it is not likely to change.

Accordingly, the government initiated a study under its Water for Food program to find the best way to source new water for growers within fully allocated sub-catchments, and the region as a whole, to protect farmers’ businesses against climate change.

The Southern Forests Irrigation Scheme is the result of that study and is being progressed in the same model as the successful Tasmanian Irrigation schemes. It brings new water

from areas not accessible to farmers in any of the region’s sub-catchments to provide water security and an ability to potentially expand businesses and the industry as a whole.

Project timeline: Mid-Late 2020

Design and approvals complete

Mid-Late 2020

Construction Tender process

2021

Construction commences

2023

Operational

Funding and support for the scheme There is strong local support for the scheme, which has received a combined contribution of nearly $60 million in government funding, and approximately $65 million in pledges from local farmers.

Importantly, the scheme enjoys support from both sides of politics, with the Labor State Government committing $19 million to the project, and the Federal Liberal-National Government recently committing another $39.8 million under the National Water Infrastructure Development Fund. The scheme has the scientific support of DWER, plus formal support from the Shire of Manjimup.

The scheme is well supported by local farmers, with 88 per cent of water entitlements already pre-sold to local farming families and there is strong demand for the remaining 12 per cent.

Mr Giblett said the families had so far committed $11 million to the scheme, with a further $54 million of on-farm works to follow.

“I can’t under estimate just how important this project is for the local community,” he said.

“This investment will flow directly into the hands of local suppliers and businesses.”

“Local farmers and this level of personal financial investment are the reasons this scheme will be able to deliver economic and social outcomes for the whole community.

“South west businesses of all shapes and sizes, including irrigation suppliers and installers, earthmoving contractors, electricians, mechanic, concrete suppliers, labour hire companies, steel suppliers and fabricators, transport and logistics companies, farm machinery suppliers, banking, and insurance, all stand to benefit from the economic activity the scheme is expected to generate.”

Overall, the estimated economic impact for the region includes an increase of up to 150 direct farm jobs and indirect employment of up to 75 positions and a further 125 jobs during construction.

Recent progress update The Co-operative has recently been undertaking flora and fauna surveys in the proposed location of the dam on the Record Brook and along the proposed pipeline route.

The surveys, undertaken by an experienced environmental contractor, will form a baseline for the Co-operative to prepare documentation and submit applications to authorities, including the Environment Protection Authority.

Project Manager Jeremy Bower said the surveys were the latest in a long line of environmental studies undertaken by the Co-operative as part of its commitment to ensuring the project could be delivered with the least possible impact on the environment.

“We are doing everything we can to minimise the impact on the local environment,” he said. “We have already altered the size and position of the dam so as to avoid any impact on old growth forest and our pipeline design utilises road side, cleared paddocks and State Forest that has historically been logged.”

The Co-operative is also preparing for the next round of water sales to local farmers and has recently launched a Facebook page to share information with the community about the project.

“The Co-operative has engaged with the local community throughout the project and as we progress through milestones we are sharing these with the community and trying to answer any questions raised.” Jeremy said.

Now that federal funding has been pledged, Harvey Giblett is looking forward to the next phase of the project which includes water sales, detailed engineering and engaging local farmers and stakeholder groups.

“This really is a project that has a potential benefit to just about everyone in these towns,” he said.

“It’s generating widespread economic benefit and creating a new public open space that can be put to use by locals for recreation such as freshwater fishing and marron fishing.”

“We understand there is a strong level of interest in the community, and particularly from local businesses, so we would encourage irrigators and local companies to get on board, follow our Facebook page to get updates on this important project for the south west.”

You can read more about the Southern Forests Irrigation Scheme online at http://sfirrigationcooperative.com.au/ or search for Southern Forests Irrigation Scheme on Facebook.

Any questions about the project can be sent to: info@sfic.com.au

The scheme also has the potential to provide improved drought security and so will benefit the local community socially by reducing financial pressure placed on farmers during drought.

The Overflow - Winter 2019

25

Nutrient rich wastewater irrigating 2,000 citrus trees – Part 2 Article by Earth and Water

Above and right: Southern Stars Holiday Park, Busselton

The Installation, Monitoring & Reporting Stage prior to DWER Wastewater Approval In the Autumn edition, we outlined the Southern Stars Holiday Park Wastewater Treatment System Nutrient Irrigation Management Plan (NIMP) and System Process. Southern Stars has 105 caravan sites and generates up to 55,000 litres of wastewater per day.

The wastewater is treated by an Activated Sludge Return “Treatment Train” using beneficial microbes and an aeration and high volume air oxidisation pump. The residue (sludge) is beneficial to the whole treatment system as it contains organisms to breakdown the wastewater.

Southern Stars uses treated wastewater to irrigate 15,000 sqm of citrus trees in 3m wide rows with Kikuyu lawn between each row.

A Netafim Lilac 16mm Dripline with 2.3lph AS XR Drippers at 0.5m drip spacing was injected 120mm deep using the Earth & Water Commercial Dripline Injector in 1m rows.

The machine leaves a narrow slot that disappears after two months of Kikuyu lawn growth. Although you can see stripping due to increased growth in the greener lawn over each row of dripline from the nutrient rich water supply. This is not an issue for a farmer, as he does not need a perfectly uniform lawn between the rows of trees.

The AS XR dripline offers anti-suck back to prevent soil suck back into the dripper. The XR denotes the root intrusion

26 The Overflow - Winter 2019

feature using copper impregnated drippers.

One issue we face with nutrient rich water is the roots can be attracted to the source, clogging the drippers. The XR copper drippers are now a well proven root deterrent in addition to regular irrigation cycles and regular dripline flushing.

The design of the field irrigation system uses mainly 50mm PVC submains with Netafim PVC Line Starters / Rubber Grommets inserted every 1m across the paddock. The dripline then runs in 1m rows about 150m across the field to the other end, to the 50mm PVC collection manifold. The 8 irrigated zones each have a check valve at the end prior to the 8 zones connecting into a common 50mm PVC pipe that runs back to the 1st tank at treatment plant. At the 1st tank we have installed an automatic solenoid valve that is set to open at the end of each zone’s irrigation cycle. About 10 minutes of irrigation followed by 1 minute of high velocity rinsing of the driplines. The regular rinse using the irrigation controller reduces the operator workload and ensures it does get done.

The irrigation is sequenced by a SIGNAL irrigation controller and activates the field valves via two-wire cable. The SIGNAL controller is activated by a water level float in the final irrigation tank to start a sequence of irrigation. The volume of the tank allows full cycle through all zones to spread the wastewater uniformly through the citrus grove.

Above: Depth of Lysimeters

The SIGNAL controller is connected to the pulse water to allow either time or volume control and to log the volume of water pumped. The system is also controlled by a moisture meter in the field that activates a by-pass solenoid valve to the 1st treatment tank to back up 50,000 litres of extra water storage within the four 30,000 litre poly tanks and the containerised treatment system. At this stage we have not overloaded the soil moisture to by-pass the field. If this becomes an issue, then we will add more storage for winter using either a lined pond or more tanks.

We have installed Lysimeters to ensure the irrigated water and/ or rainwater does not percolate down to the water table that will rise up to 2.0m below ground level in winter. The two Lysimeters are buried 500mm and 1,500mm deep to catch drainage. To date they have not found any rainwater or irrigated water at the 1,500mm depth.

Above: Flushing manifold check valves and water treatment plant

front of the treatment system, and to consider how much Nitrogen and Phosphates work their way through the system.

The loadings vary due to busy weekends such as Easter with 105 caravans for a few days to nearly none in wet, cold periods.

Once we have balanced the system the operator can be more predictive than reactive to peak loads or changing wastewater. In some cases, the caravans use their own toilet and not the park’s toilets, reducing the nutrient load, but increasing the chemical load “burning off” some of the beneficial bacteria. DWER test criteria and typical result that meets their requirements:

DWER determined we should construct two monitoring bores to allow measurement of the depth to the water table and water sampling to ensure no nutrients contaminate the shallow aquifer. One bore is within the dispersal area and the second “downstream”. To date no cross contamination has occurred.

In addition to the two DWER bores, we have constructed a third monitoring bore to assess any nutrient loading or water table changes from “upstream” of the project. This is a prudent insurance to ensure contamination does not enter the dispersal site from other farmers’ paddocks upstream.

DWER require weekly sampling and analysis for a period of not less than 3 months. To date we have returned varied results with no contamination to site. The trick is to learn how to manage chlorine levels, water treatment sequencing such as setting how often the Activated Sludge is returned back to the

The Overflow - Winter 2019

27

This edited excerpt of Miscellaneous Technical Note A (v2 – May 2019) is published with permission, to provide clarification and advice to the irrigation industry of the plumbing requirements in Western Australia (WA) about the following topics: 1 – Water Services Providers’ conditions of connection: 2 – Certification of plumbing work for reticulation cut-ins.

Water Services Providers’ conditions of connection The Plumbers Licensing Act 1995 and the Plumbers Licensing and Plumbing Standards Regulations 2000 (the Regulations) set the regulatory requirements for the installation of plumbing work in WA. The Regulations call up the Plumbing Code of Australia as the plumbing standards which prescribe the National Plumbing and Drainage series, AS/NZS 3500:2018, parts 0, 1, 2 and 4 as deemed-to-satisfy provisions.

Conditions of connection for plumbing installations to be connected to a Water Services Providers’ (WSP) infrastructure fall under the Water Services Act 2012 and the Water Services Regulations 2013. These Regulations supersede the Metropolitan Water Supply Sewerage and Drainage By-laws 1981 and other legislation relating to country areas. These conditions are designed to protect the water supply and sewerage infrastructure serving private building lots. The following are examples from the Water Services Regulations 2013 that may affect plumbing installations: • In relation to reticulation cut-ins, regulation 24(2) requires that, except in accordance with the approval of the WSP, no branch or fitting shall be connected to a property water supply connection within a distance of one (1) metre on the consumer’s side of the water meter or the stop-cock.

Irrigation/reticulation cut-ins compliance certificates Licensed plumbing contractors are reminded that the installation of types B, C and D irrigation systems as set out in AS/NZS 3500.1:2018, section 7, currently require backflow

28

The Overflow - Winter 2019

protection on all occasions. Type B irrigation systems for domestic or residential buildings are considered a low hazard, Type C irrigation systems for commercial buildings a medium hazard and Type D irrigation systems where there is chemicals injected or siphoned into the system for either domestic or residential and commercial buildings is a high hazard. This means that the cutting in of a tee piece, installation of an isolating valve and required backflow prevention device requires the submission of a notice of intention to commence major plumbing work at least 24 hours before the work is done. The completed certificate of compliance for major plumbing work must be submitted within five working days after the major plumbing work is completed.

The garden reticulation installation referred to on the minor plumbing work compliance certificate (code 15) relates to Type A systems only where all permanently open outlets and piping are more than 150mm above finished ground level. No backflow prevention device is required in this situation and the work is considered minor plumbing work. Type A systems where all permanently open outlets are subject to ponding or backpressure or which contain injection systems shall have the appropriate backflow device fitted and major plumbing work certificates submitted. AS/NZS 3500.1:2018, clause 4.6.2.1(d) does not allow backflow prevention devices to be buried in the ground. This means that those non-testable devices that are not required to be installed above the surrounding surface level (dual check valves) may be situated in a box below the surrounding surface. It should be noted that AS/NZS 3500.1:2018, clause 4.6.2.1(f) requires all in line devices to be installed with connections to permit the removal and replacement of the device. The box installed below ground must also accommodate this requirement.

Water Update

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

Water Usage Metro Region

Yearly Streamflow

Perth Rainfall Comparison

8.7.2019

The Overflow - Winter 2019

29

Have you visited the

Whether you are starting from scratch or wanting to improve your existing system, talk to a Waterwise Garden Irrigator for professional irrigation design, installation and maintenance services.

If you prefer to do-it-yourself, get expert advice and quality parts from your local Waterwise Irrigation Design Shop (retail outlet).

WA Waterwise PROGRAMS Website?

To find a Waterwise professional in your local area, simply scan our QR code to search the Waterwise Irrigation Directory, or visit our website wa.waterwiseprograms.com.au

www.wa.waterwiseprograms.com.au

Search the Waterwise Irrigation Directory

Alternatively please contact us on: (08) 9368 3136 | adminsupport@irrigation.org.au | wa.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 Irrigator

30

Waterwise Garden Irrigator

Waterwise Garden Irrigator

AAA Irrigation

Growing Assets

Rain Maker Irrigation Services

Ace Horticulture Services

Huntley Irrigation

Rapid Retic

Addwater Reticulation

Instant Gardens

Retic Express

Adonis Gardening & Irrigation

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Retic Turf & Soakwells Pty Ltd

Advantage Bores & Reticulation Services

Irriscape Reticulation & Landscaping

Reticulation Pro

Albany Spray On Lawns

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Scott Jordan Landscaping

AllStyle Gardens

Jim's Mowing East Rivervale

Softscapes & Reticulation Pty Ltd

All water irrigation

Jim's Mowing Wilson North

Sprinkler Fixers

Allwest Bores & Reticulation

Joel Irrigation & Landscaping Pty Ltd

Superior Landscaping & Reticulation

Aurora Landscaping

Landscape Elements Pty Ltd

The Garden Fixer

B & C Fiorini Pty Ltd

Landscape Works WA

The Greenscape Collective

Bolesta's Backyard Creations

LD TOTAL

The Retic & Landscape Shop

Bowie Irrigation

Love My Retic

The Retic Bloke

Bradkaz Irrigation

Luke's Landscaping Co

The Watershed Water Systems Midland

Brookfield Landscaping

MacKenzie Landscapes

Think Water Dunsborough

Clackline Reticulation

Midwest Turf Supplies

Think Water Geraldton

Coast to Coast Irrigation

MJ Landscaping

TLC Services Perth

Condo Landscapes Pty Ltd

Mr Retic

Top Dog Landscaping and Reticulation

Country Landscaping Pty Ltd

Peel Scape Solutions

Total Eden Watering Systems Bibra Lake

Custom Green Scapes

Perdita Reticulation & Garden Solutions

Turfed Out

DJ's Property Maintenance Services

Perfect Home Solutions

Ultimate Blue Pty Ltd

Earlybird Landscaping

Perth Lawns and Retic

Urban Ecological

Earth & Water Pty Ltd

Perth Reticulation Service

Urban Outlook Landscape Constructions

Elliotts Irrigation Pty Ltd

Pimp My Yard

WA Reticulation Supplies

Evergreen Blades

Portworks

Water Well Reticulation

Evergrow Gardenscapes

Prime Landscaping Pty Ltd

WaterLink

First Element Irrigation

Prime Yard Service

Waterwise Landscaping

FPM Landscapes

PTC Irrigation

WF Landscape Industries Pty Ltd

Garden Solutions

Pumps N Pipes Supplies

Wild Earth Landscapes

The Overflow - Winter 2019

Willetton Landscapes

The website features an extensive and up-to-

date business directory where the community can search for their local Waterwise members, based on their location. Head to the search directory at

www.wa.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 Shop

Waterwise Irrigation Design Shop

Addwater Reticulation - Maddington

Think Water Dunsborough

Controlled Irrigation Supplies - Joondalup

Think Water Geraldton

Elliotts Irrigation Pty Ltd- Greenwood

Total Eden Watering Systems - Balcatta

Muchea Irrigation & Rural Supplies

Total Eden Watering Systems - Bibra Lake

Rainscape Waterwise Solutions

Total Eden Watering Systems - Byford

Reece Irrigation - Belmont

Total Eden Watering Systems - Canning Vale

Reece Irrigation - Canning Vale

Total Eden Watering Systems - Greenwood

Reece Irrigation - Malaga

Total Eden Watering Systems - Joondalup

Reece Irrigation - Osborne Park

Total Eden Watering Systems - Malaga

Reece Irrigation - Rockingham

Total Eden Watering Systems - Mandurah

The Retic & Landscape Shop- Southern River

Total Eden Watering Systems - Midvale

The Watershed Water Systems - Cockburn

Total Eden Watering Systems - Myaree

The Watershed Water Systems - Midland

Total Eden Watering Systems - Osborne Park

The Watershed Water Systems - Morley

Total Eden Watering Systems - Rockingham

The Watershed Water Systems - Subiaco

WA Reticulation Supplies - Armadale

Think Water Broome

WA Reticulation Supplies - Midland

The Overflow - Winter 2019

31

you can’t beat

The Original

water is precious. put your trust in the original.

For more information please contact your local Philmac dealer or call 1800 755 899 32 PHI0533-04/19

The Overflow - Winter 2019