What is the Torrens River?

The Torrens River is the river that flows through the centre of Adelaide, the capital of South Australia. It rises in the Mount Lofty Ranges east of Adelaide and flows about 85 kilometres through the metropolitan area to Henley Beach on Gulf St Vincent on the Indian Ocean.

Adelaide was deliberately laid out in 1837 by Colonel William Light to straddle the Torrens, with North Adelaide on the high ground north of the river and the central business district on the south bank. The river is now the centrepiece of the Adelaide Park Lands, a continuous belt of green space ringing the city, and a designated National Heritage place. The Kaurna people, the Traditional Owners, call the river Karrawirra Parri.

The Torrens is dammed at the Adelaide Weir to create the Torrens Lake, an artificial lake about three kilometres long that has been the heart of Adelaide's recreational and cultural life since 1881. The Adelaide Festival Centre, the Adelaide Convention Centre, and the Adelaide Oval all sit on or near the Torrens Lake, and Popeye boats have ferried tourists along the lake since 1935.

The river was originally a chain of intermittent waterholes that ran dry in summer, before colonial settlement intensified its flow with stormwater drainage. Toxic blue-green algal blooms in the Torrens Lake have been a recurring management challenge since the 1980s, prompting a series of water-quality programs by the South Australian government. Floods of the upper Torrens were largely tamed by the Kangaroo Creek Dam (1969), which now protects Adelaide from inundation. The river continues to define Adelaide's park-and-river character, a feature that distinguishes it from the larger Australian capitals.