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Fifty Years of Water Sensitive Urban Design, Salisbury, South Australia |
John C. Radcliffe1( ), Declan Page1, Bruce Naumann2, Peter Dillon1 |
1. CSIRO Land and Water, Private Bag 2, Glen Osmond, South Australia 5064, Australia
2. City of Salisbury 12 James St, Salisbury, South Australia 5108, Australia |
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Abstract Low Impact Development was able to be adopted over a 50 year period by the City of Salisbury as it expanded from 4160 to 137,000 people The management of stormwater and groundwater was integrated through use of wetlands and managed aquifer recharge. Federal, state and local government contributed with developers and local industry to establish the integrated system as a commercial business supplying recycled water for non-potable amenity and industrial use. It has been shown with little additional water treatment, water originally treated through wetlands and aquifer storage could be safely withdrawn for a range of uses including as a potable water source.
![]() Australia has developed extensive policies and guidelines for the management of its water. The City of Salisbury, located within metropolitan Adelaide, South Australia, developed rapidly through urbanisation from the 1970s. Water sensitive urban design principles were adopted to maximise the use of the increased run-off generated by urbanisation and ameliorate flood risk. Managed aquifer recharge was introduced for storing remediated low-salinity stormwater by aquifer storage and recovery (ASR) in a brackish aquifer for subsequent irrigation. This paper outlines how a municipal government has progressively adopted principles of Water Sensitive Urban Design during its development within a framework of evolving national water policies. Salisbury’s success with stormwater harvesting led to the formation of a pioneering water business that includes linking projects from nine sites to provide a non-potable supply of 5 × 106 m3·year−1. These installations hosted a number of applied research projects addressing well configuration, water quality, reliability and economics and facilitated the evaluation of its system as a potential potable water source. The evaluation showed that while untreated stormwater contained contaminants, subsurface storage and end-use controls were sufficient to make recovered water safe for public open space irrigation, and with chlorination, acceptable for third pipe supplies. Drinking water quality could be achieved by adding microfiltration, disinfection with UV and chlorination. The costs that would need to be expended to achieve drinking water safety standards were found to be considerably less than the cost of establishing dual pipe distribution systems. The full cost of supply was determined to be AUD$1.57 m−3 for non-potable water for public open space irrigation, much cheaper than mains water, AUD$3.45 m−3at that time. Producing and storing potable water was found to cost AUD$1.96 to $2.24 m−3.
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| Keywords
Managed Aquifer Recharge (MAR)
Stormwater harvesting
Water recycling drinking water
Low impact development
Water sensitive urban design
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Corresponding Author(s):
John C. Radcliffe
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Issue Date: 11 May 2017
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