It passes between the city-centre and North Adelaide, forming the Torrens Lake between the Adelaide Zoo and a weir opposite Adelaide Gaol. The river then continues the remaining eight kilometres to the sea at Henley Beach South, emptying into Gulf St Vincent via a constructed outlet. Hope Valley, Millbrook and Kangaroo Creek Reservoirs, which provide water storage for Adelaide, capture the river's flow. These reservoirs form part of the Adelaide Hills catchment, which supplies 60% of Adelaide's water needs in an average year. Adelaide City Council uses water from the lower river to irrigate the city's surrounding parklands. Rubbish accumulation in the lower river is controlled with numerous collection racks, and sediments and other pollutants are filtered through constructed wetlands. The earliest linear river park in Australia bounds the suburban end of the river. The park is 35 km long with numerous playgrounds walkways and bicycle tracks. On the south bank of the lake, adjacent to the Adelaide Festival Centre, Elder Park is used for the annual Tasting Australia festival, mass singing of christmas carols at the annual "Carols by Candlelight", and other public events throughout the year. The Popeye tourist boats, small paddle boats and Black Swans of the lake are icons of the area and frequently featured in postcard photographs of the city. Due to now-limited natural river flow and stormwater born organic material, the lower river, (particularly the lake), is often polluted with algal blooms and significant levels of E. coli bacteria in spring and summer. Numerous taskforces have been formed to improve the river's water quality, including one created in 2006 by the Minister for the Environment and Conservation. The river is a used by many for recreation, with the footpaths on the riverbanks often filled with cyclists and joggers. Rowers use the lake for training all year round, and many clubs such as the Adelaide University Boat Club, the Adelaide Rowing Club, and the boat houses of the secondary schools which participate in the annual Head of the River are located upon its banks. Several rowing regattas are held on the Torrens Lake course in the summer months of each year, contested by both club and school crews. See also References Bibliography Further reading Adelaide & Mount Lofty Ranges Natural Resources Management Board State Library Manning Index: River Torrens (CC Attribution-NonCommercial 3.0 Australia Licence) – includes some history old photos and citations Physiographic sections Torrens