Eurobodalla Integrated Water Cycle Management Strategy

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92 Eurobodalla Integrated Water Cycle Management Strategy that end use. Whilst technology is available to produce reclaimed water of highest purity devoid of any contaminants, for most end uses this level of treatment is not warranted. See appendix D for the minimum acceptable quality for most end uses. In Eurobodalla the main uses for reclaimed water are: Urban open space Industrial Agriculture (broad acre and constructed environment) Residential non-potable Potable (direct and indirect) Environmental At the inter-agency meeting held in October 2002, the Department of Health asserted that it would not support potable (direct and indirect) reclaimed water reuse. Urban Open Space and Industrial Reclaimed water is currently reused at Batemans Bay and Moruya golf courses. There may be scope to extend recycled water systems to irrigate other urban open space areas including: Batemans Bay Hanging Rock Gardens (16 ha) Tuross Golf course and Parks (28 ha) Moruya Racecourse (47 ha) Narooma Golf course (15 ha) Tomakin Captain Oldrey Park, The Oaks Ranch Country Golf Club, Sports Club Park It is estimated that utilising reclaimed water for these areas would result in the reuse of an additional 5% of current total shire flow. Currently the abovementioned open space areas do not use town water supplies, however utilising reclaimed water on these sites would provide an aesthetic appeal to the area by keeping the grass green all year round including during drought periods. Residential Non-Potable NSW has pioneered the development of water recycling for residential use in Australia. The 1993 NSW Guidelines for Urban and Residential Use of Reclaimed Water were the first of its kind in Australia. The major residential reuse scheme in Newington Village at Sydney Olympic Park was commissioned in April 2001. The major residential reuse system at Rouse Hill in north-western Sydney has been up and running for 18 months. Another major residential reuse scheme is under construction at Mawson Lakes in Adelaide. An examination has been made of a possible residential reuse system for the Rosedale development. The system would feature a service reservoir as a central storage, and a reticulation system specifically constructed for the delivery of reclaimed water for garden watering, toilet flushing and washing machines (cold water only). Recycled water for household use must meet the NSW Guidelines for Urban and Residential Use of Reclaimed Water developed by the NSW Recycled Water Co-ordination Committee. These guidelines include limits for microbiological and physical criteria along with general guidelines for nutrients and trace contaminants. Delivery from a water reclamation facility including
Eurobodalla Integrated Water Cycle Management Strategy membrane filtration and disinfection at the Tomakin STP would be more cost effective than sewer mining. Considerable effort is being applied worldwide to the development of appropriate technologies and management systems for on-site wastewater management systems. There are a variety of new on-site and decentralised treatment systems coming on to the market which provide potential to undertake water recycling on a household, neighbourhood or subdivision scale at a similar or less overall cost than a fully reticulated water recycling system from a centralised treatment system. A number of these systems have been successfully implemented in the USA. Factors important for a successful system include a careful evaluation of the site capability to ensure that there will not be adverse health and environmental impacts, and the adoption of centralised management of decentralised treatment and recycling systems. The bulk supply of reclaimed water to large urban landscaping and industrial customers is usually more cost effective than residential reuse. Due to the small number of large commercial and industrial consumers in the Eurobodalla Shire, the potential for commercial and industrial reuse is minimal. It might be possible to justify the development of a dual reticulation reclaimed water system for Rosedale and other new development areas when account is taken of: The benefits of increased yield in droughts The economic benefits of freeing up peak day capacity in the system to serve other users The garden water benefits to householders, particularly during droughts The environmental benefits of reduced freshwater diversions above the tidal limit, and The environmental benefits of reduced reclaimed water discharges to the estuary or the ocean. Previous analysis indicates that the capital cost associated with a second reclaimed water reticulation network is about $2 560/lot. This cost includes the plumbing costs. The annual operating, maintenance, compliance and monitoring costs are about 10% of the capital cost. Therefore to service 1 000 new lots would cost around $2.6m. Agriculture – Cropping in Natural and Constructed Environment Agricultural cropping in the natural environment refers to the conventional practice of broad acre farming. There are many examples of ‘cropping in the natural environment’ agricultural reuse schemes in Australia, however most of these are undertaken in areas with lower rainfall. Examples include irrigation of sugar cane crops along the drier parts of the Queensland coast, the major scheme to irrigate dairy pasture now under construction in the northern Shoalhaven area near Nowra in NSW, and irrigation of horticultural crops at Virginia in South Australia. Agricultural cropping in a constructed environment includes nurseries and open and covered hydroponic systems. Although there are currently no such enterprises within Eurobodalla, Council could promote these types of enterprises given their high margins and the water use of these types of enterprises. Additional information on these types of enterprises is contained in appendix N2. The shire-wide reclaimed water reuse review has identified the Moruya and Tuross River flats as the two major dairy and agricultural regions in the shire. The Moruya region comprises approximately 1 000 ha of dairy land and the agricultural and the Tuross region contains about 1 500 ha. 93
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xviii TABLES Eurobodalla Integrated
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FACT SHEET 3 Rainwater Tanks 18 Eur
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FACT SHEET 9 Loss Reduction 24 Euro
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38 Number of Persons 2,500 2,000 1,
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Page 68 and 69: 42 % Occupancy 80% 70% 60% 50% 40%
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Page 72 and 73: 46 Annual Volume (ML/Yr) 2,500 2,00
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Page 84 and 85: 6.5.3 Stormwater Issues 58 Euroboda
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144 Social Issues Eurobodalla Integ
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9.11 Potato Point 9.11.1 Background
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9.14.2 What are the Issues? 202 Eur
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9.15.2 What Are the Issues? 208 Eur
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214 ML/a 8000 7000 6000 5000 4000 3
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216 ML/a Eurobodalla Integrated Wat
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228 SCENARIO 1 Regional Water Suppl
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