page_title: Adelaide
section_title: Water
hierarchical_section_title: Adelaide / Infrastructure / Water
caption_attribution_description: Aerial photo of Happy Valley Reservoir, South Australia. Commercial flight.
context_page_description: Adelaide AD-ə-layd, is the capital city of the state of South Australia, and the fifth-most populous city of Australia. The demonym Adelaidean is used to denote the city and the residents of Adelaide.
  Adelaide is situated on the Adelaide Plains north of the Fleurieu Peninsula, between the Gulf St Vincent in the west and the Mount Lofty Ranges in the east. Its metropolitan area extends 20 km (12 mi) from the coast to the foothills of the Mount Lofty Ranges, and stretches 96 km (60 mi) from Gawler in the north to Sellicks Beach in the south.
  Named in honour of Queen Adelaide, consort to King William IV, the city was founded in 1836 as the planned capital for the only freely-settled British province in Australia. Colonel William Light, one of Adelaide's founding fathers, designed the city centre and chose its location close to the River Torrens, in the area originally inhabited by the Kaurna people and known as Tarndanyangga ("place of the red kangaroo"). Light's design, now listed as national heritage, set out the city centre in a grid layout known as "Light's Vision", interspaced by wide boulevards and large public squares, and entirely surrounded by parklands.
context_section_description: The provision of water services is by the government-owned SA Water. Adelaide's water is supplied from its seven reservoirs: Mount Bold, Happy Valley, Myponga, Millbrook, Hope Valley, Little Para and South Para. The yield from these reservoir catchments can be as little as 10% of the city's requirements (90GL per annum) in drought years and about 60% in average years. The remaining demand is met by the pumping of water from the River Murray.
  A sea-water desalination plant capable of supplying 100GL per annum was built during the 2001–2009 drought; however, it operated at about 8% of its capacity until 2019. In December 2018, the State and Federal Governments agreed to fund a $2m study to determine how the plant could be used to reduce reliance on river water, in an effort to help save the Murray River basin and mouth (including the Coorong) from further ecological damage.
caption: Aerial view of Happy Valley Reservoir in early 2007
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