Mount Lofty Ranges Water Protection Area with Priority Areas

Dataset Number1520
Dataset TitleMount Lofty Ranges Water Protection Area with Priority Areas
CustodianData Authority: Environment Protection Authority
Data Provider: Environment Protection Authority

Description

DescriptionDefines three areas/zones within the Mount Lofty Ranges Water Protection Area based on water quality risk within the current Adelaide mains water supply system.
UsageCan be used to define the priority areas for water quality risk management in the Adelaide Mount Lofty Ranges Water Protection Area.

Data Quality

LineageThe boundary of the Mount Lofty Ranges Water Protection Area is the extent of the reservoir catchments sourced from contour and drainage spatial data as defined by the Department of Environment and Water. The definition of three priority zones was based on the 2006 report "Protecting drinking water quality into the future: Priority areas and landuse compatibility in Adelaide's Mt Lofty Ranges Watershed".
CompletenessConsidered compete
Positional AccuracyFeatures in close proximity to the boundary of each priority zones generally accurate to +/- 500 metres.

Geographic Extent

Extent NameSouth Australia
Min Easting or Longitude129
Min Northing or Latitude-38.25
Max Easting or Longitude141
Max Northing or Latitude-26

Dataset Status

Initially Acquired1/07/2006
Last Updated4/10/2018
Update FrequencyAs required
Maintenance MethodThe data will be updated as required.
AusGOALNot yet determined

Attributes

TableNameField AliasData TypeDescription
Mount Lofty Ranges - Priority AreasPriorityID short integerPriority Area 1 includes all catchments that drain to primary water supply reservoirs and diversion weirs (eg. Myponga reservoir, Clarendon weir, Gorge weir, Millbrook reservoir catchments). This area represents 29.54% of the entire Mt Lofty Ranges Water Protection Area. Activities and new developments in this area have the highest risk of polluting raw mains water supplies because there are no substantial on-stream barriers to trap pollutants prior to intakes into water filtration plants. Priority Area 2 includes: land within 2km of secondary water supply reservoirs (eg. Mt Bold, Kangaroo Creek, South Para and Warren Reservoirs); land within 100m of the River Torrens and Onkaparinga Rivers below Mt Pleasant and Hahndorf respectively (ie. below where River Murray water is pumped and allowed to gravitate into downstream reservoirs); land subject to 1 in 100 year floods; all land in the Aldgate, Cox and Lenswood subcatchments (ie. subcatchments that generate more than 200mm rainfall equivalent runoff per year). These areas represents 15.75% of the entire Mt Lofty Ranges Water Protection Area. Activities and new development in these areas have a moderate risk of polluting raw mains water supplies even though they are located above major secondary reservoirs that can trap a substantial proportion of pollutants in most flow conditions. Priority Area 3 incorporates all remaining parts of the Mt Lofty Ranges Water Protection Area and represent 54.70% of the entire Mt Lofty Ranges Water Protection Area. Activities and new developments in these areas have the lowest risk of polluting raw mains water supplies, but still present risks that need to be carefully considered and managed.

Contact Information

OrganisationEnvironment Protection Authority
Postal AddressGPO Box 2607

ADELAIDE
5001
EmailDEWNR.CustomerServiceCentre@sa.gov.au