Code of Practice - Irrigated Public Open Space - SA Water

The City of Salisbury now has some thirty six major
wetlands, covering several square kilometres in all. In
addition, all new residential subdivisions in the past ten
years have been required to install wetlands to contain
stormwater onsite as much as possible. Large industrial
developments have also been actively encouraged to develop
wetlands for the same reason and in order to contain
potential industrial spills. Collectively, these initiatives have
effectively eliminated flood risk in an otherwise flood-prone
area and have dramatically increased the wildlife habitat
and biodiversity within the City.
Importantly, they have also substantially reduced the flow
of polluted surface water into the fragile Barker Inlet
estuary, opened new opportunities for the economic
recycling of stormwater and reduced demand on water
sourced from the River Murray.
Water for Industry
The City of Salisbury has six ASR sites currently operating,
harvesting a total of 1,895 megalitres (ML) of stormwater
annually. Two ASR sites are used to provide water to
industry which would otherwise rely on mains water as the
primary source. The Parafield Wetlands provide 1,100 ML
per annum to G H Michell and Sons, Australia’s largest
wool processing company. The Kaurna Park Wetlands
provides 100 ML of water to Heynes Nursery. The
Edinburgh Parks Storm Water Supply Project is currently
under development and will yield approximately 1,500 ML
of water annually supplying General Motors Holden,
DSTO, Edinburgh Airport and the Edinburgh Parks
Industrial Precinct.
Irrigation
AQUIFIERSTORAGE ANDRECOVERY(ASR)
Injection
Well Wetland/Basin
Wet Season
DrySeason
Sewage
Treatment
Stormwater/
Wastewater
Sewage
GroundwaterLevel
ConfiningLayer
Aquifer
Storm/Wastewatertoaquiferinwetseason
Recoveryfromaquiferindryseason
Natural
Recharge
APPENDICES
38
Water for Irrigated Public Open Space
In addition to supporting industry with supplies of
alternative water sources, the City of Salisbury has invested
significantly in developing alternative water supplies to
irrigated public open space. In 1983 Salisbury had only
6% of its irrigated area supplied by alternative water
supplies to mains water. In 2006 this increased to 56%.
City of Salisbury Water Use Profile 2006
– Irrigated Public Open Space
Water Supply Native Re-claimed Storm
Mains Ground Effluent Water Total
Water ASR
Area ha 75 48 11 35 169
Area % 44% 28% 7% 21% 100%
ML / Annum 285 183 42 134 643
Reclaimed
Effluent
7%
CITYOFSALISBURYWATERUSEPROFILE2006
Stormwater ASR
21%
Mains
44%
Extension of the ASR program has also seen schools within
the council area being provided with water to irrigate their
sports grounds. Currently eight schools are being supplied
with ASR based water with a further thirty sites identified
for connection over the next three years.
Water for the Community (Mawson Lakes)
Native
Ground Water
28%
The developing suburb of Mawson Lakes in the City of
Salisbury local government area will cater for approximately
10,000 residents when complete in 2010. This innovative
development uses recycled water technology to provide both
potable mains water and alternative recycled water to every
house in the development.
This recycled water system is the product of a unique
partnership between the State Government’s Land
Management Corporation, SA Water, Delfin Lend Lease
and the City of Salisbury.
The recycled water is a mix of treated wastewater from the
SA Water Bolivar Wastewater Treatment Plant and cleansed
stormwater from the Parafield Airport Wetlands.