Derwent River (Tasmania) Totally Explained

Everything about Derwent River Tasmania totally explained

ť For other rivers called Derwent, see River Derwent.

The Derwent is a river in Tasmania, Australia.It was named after the River Derwent, Cumbria by British Commodore John Hayes who explored it in 1794. The name is Brythonic Celtic for "valley thick with oaks".
   The River Derwent was inhabited by the Mouheneener people for at least 8000 years before British settlement. Evidence of their occupation may be found in many middens along the banks of the river. The Mouheneener people's name for the river is Teem.toomele men.en.nye.
When first explored by Europeans, the lower parts of the picturesque valley were clad in thick she-oak forests, remnants of which remain in various parts of the lower foreshore.
   Several bridges connect the western shore (the more heavily populated side of the river) to the eastern shore of Hobart – in the greater Hobart area, these include the five lane Tasman Bridge, near the CBD, just north of the port; the four lane Bowen Bridge; and the two lane Bridgewater Bridge and Causeway. Until 1964 the Derwent was crossed by the unique Hobart Bridge, a floating concrete structure just upstream from where the Tasman Bridge now stands.
   There was a thriving whaling industry until the 1840s when the industry rapidly declined due to over-exploitation.
   The Upper Derwent is affected by agricultural run-off, particularly from land clearing and forestry. The Lower Derwent suffers from extremely high levels of heavy metal contamination in sediments. The State Government-backed Derwent Estuary Program points out in particular that levels of mercury, lead, zinc and cadmium exceed national guidelines. They also recommend against consuming shellfish and caution against consuming fish in general. A large proportion of the heavy metal contamination comes from major industries that discharge into the river: an electrolytic zinc smelter at Lutana established in 1917, and a paper mill at Boyer which opened in 1941. The river is also the subject of the multimedia performance "Falling Mountain" (2005 Mountain Festival), a reference to the mountain in the Cradle Mountain Lake St Clair National Park from which the river rises.

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