The Patawalonga water management area is a groundwater management unit (~231 km2) consisting of the Adelaide metropolitan and surrounding areas (total population ~1,124,000) to the west of the Mt Lofty Ranges (See Figure 1). It is a subset of the Adelaide water supply area. The main drainage features in the area are the Sturt River and Brownhill Creek, with discharge to the ocean via the Patawalonga stormwater outlet. Urban stormwater is a significant input to surface water.
The total transfer of water into the water management area is ~65,000 ML. In normal years, 60% of this water comes from runoff in the Mt Lofty Ranges with an additional 40% coming from the River Murray, though in dry years this percentage can increase to 90% (http://www.sawater.com.au/SAWater/Education/OurWaterSystems/Pipelines.htm). While the water delivery system in South Australia consists of a number of reservoirs, there are no major reservoirs located in the water management area.
Groundwater is recharged largely in the Adelaide hills in the southeast part of the catchment and moves towards the coast.
Overall, water is managed by the South Australian Department of Water, Land and Biodiversity Conservation with bulk water supplied by SA Water.
Figure 1 Patawalonga water management area locality map
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Patawalonga water management area locality map (1 Meg)
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Related Water Management Areas
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