The Hobart Rivulet, part of the River Derwent catchment, is an urban stream located in the Hobart hinterland and flows through and underneath the city, in Tasmania, Australia.
The rivulet rises on the slopes of Mount Wellington and flows generally northeast over O'Grady's Falls, Strickland Falls, through South Hobart and past what was known as the World Heritage-listed Cascades Female Factory towards the Hobart central business district. As a result of urban development, the natural course has been altered significantly. The lower portion of the rivulet has been piped through the city and runs below the central city area. The rivulet emerges again near the Royal Hobart Hospital on Collins Street before flowing underneath the Cenotaph and emptying into the Derwent.[2][3] The rivulet descends 544 metres (1,785ft) over its 7.3-kilometre (4.5mi) course.[1]
Regular tours of the rivulet once took place under the CBD.[4] The sandstone Wellington Bridge (1841) over the rivulet lies under the Elizabeth Street Mall, and is visible through a viewing portal there.[5][2][6]
Underneath Hobart
At Barrack Street
At Collins Street
At Collins Street
At Harrington Street
At Molle Street
At Molle Street
History
The rivulet was an important source of drinking water for the Mouheneener Aborigines, and later for the first European settlers.[7] The site for Hobart was originally chosen in part due to the availability of fresh water from the rivulet.[7] Because of the pure water of the upper portion of the rivulet, the Cascade Brewery was built beside it.[8] There were several typhoid epidemics during the late 19th century due to poor water quality further downstream.[7] It was also an important source of energy for early industry in Hobart.[7] There are multiple old bridges over the Hobart Rivulet. The oldest is the Wellington Bridge that is on Elizabeth Street built in 1841. Second oldest is the Harrington Street Bridge built in 1844. Third oldest is the Molle Street Bridge built in 1866.
Ecology
In June 2023, the City of Hobart published its first ever 'State of our Rivulets' report.[9] Hobart Rivulet was found to be healthier upstream than downstream, degrading gradually from its naturally forested headwaters to its urbanized mouth, where the rivulet enters the River Derwent.
The Rivulet's Celebrity Resident
The Hobart Rivulet is home to small population of urban platypus. The platypus featured in the 2023 documentary The Platypus Guardian[10], which tells the story of local Hobart resident Pete Walsh and his mission to conserve and protect them.
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Underneath Hobart
At Barrack Street
At Collins Street
At Collins Street
At Harrington Street
At Molle Street
At Molle Street
