The Derwent is a river in Tasmania, Australia. Río Peralonso - El Zulia (Norte de Santander), Colombia River Gambia flowing through Niokolokoba National Park Nevėžis River in Lithuania A river is a natural waterway usually formed by water derived from either precipitation or glacial meltwater, and flows from higher ground to lower ground. ... Capital Hobart Government Const. ...

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"^[1][2][3]. 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. ^[4] derwent_river  ©  This image is copyrighted. ... The Derwent is a river in the Lake District of the county of Cumbria in the north of England. ... Sir John Hayes (1768 - 1831) was an eighteenth century explorer for the British East India Company. ... The Brythonic languages (or Brittonic languages) form one of the two branches of the Insular Celtic language family. ... Species List of Allocasuarina species Allocasuarina is a genus in the flowering plant family Casuarinaceae, found primarily in southern Australia. ... Temperate rainforest on Northern Slopes of the Alborz mountain ranges, Iran A dense growth of softwoods (a conifer forest) in the Sierra Nevada Range of Northern California A decidous broadleaf (Beech) forest in Slovenia. ...

The river originates at Lake St Clair and flows south over a distance of 187 km to New Norfolk and the estuary portion extends a further 52 km out to sea. Flows average in range from 50 to 140 cubic metres per second. Mean annual flow is 90 cubic metres per second. ^[4] Lake St Clair is a lake in the Central Highlands area of Tasmania, Australia. ... New Norfolk is a town on the Derwent River, in the south-east of Tasmania, Australia. ...

The large estuary forms the Port of the City of Hobart – often claimed to be the deepest sheltered harbour in the Southern Hemisphere; some past guests of the port include the USS Enterprise and USS Missouri. The largest vessel to ever travel the Derwent is the 113,000 tonne, 61 metre high, ocean liner 'Diamond Princess', which made its first visit in January 2006. At points in its lower reaches the river is nearly three kilometres wide, and as such is the widest river in Tasmania. This is a great contrast to the upper reaches of the Derwent, near the town of Derwent Bridge, where, in summer, the river often slows to a trickle and can be easily crossed with one step.^{[citation needed]} Estuaries and coastal waters are among the most productive ecosystems on Earth, providing ecological, economic, cultural, and aesthetic benefits. ... Hobart is the state capital and most populous city of the Australian island state of Tasmania. ... A harbor (or harbour) or haven is a place where ships may shelter from the weather or are stored. ... The Southern Hemisphere is the half of a planets surface (or celestial sphere) that is south of the equator (the word hemisphere literally means half ball). On Earth it contains five continents (Antarctica, Australia, most of South America, parts of Africa and Asia) as well as four oceans (South... Enterprise Logo The supercarrier, USS Enterprise (CVN-65), formerly CVA(N)-65, is the worlds first nuclear-powered aircraft carrier and the eighth U.S. Naval vessel to bear the name. ... Radars: AN/SPS-49 Air Search Radar AN/SPS-67 Surface Search Radar Fire control: 4 × Mk 37 Gun Fire Control 2 × Mk 38 Gun Director 1 × Mk 40 Gun Director EW: AN/SLQ-32 Other: AN/SLQ-25 NIXIE Decoy System 8 × Super Rapid Bloom Rocket Launchers (SRBOC) Armor... Diamond Princess is a large cruise ship owned and operated by Princess Cruises. ... Derwent Bridge, Tasmania () is a locality on the Lyell Highway at the southern edge of the Cradle Mountain-Lake St Clair National Park. ...

Until the construction of several hydroelectric dams between 1934 and 1968, it was prone to frequent flooding. Seven lakes have been formed by damming the Derwent and Nive tributary for hydroelectric purposes: Lakes Meadowbank, Cluny, Repulse, Catagunya, Wayatinah, Liapootah and King William. Further other dams and diversions add to this complex scheme. A substantial part of the dam construction work was performed by Polish and British migrants after World War II. The State of Tasmania is now attempting to diversify its over reliance on power from hydroelectricity, specially considering the low storage capacity of the overall Hydro system. ^[5] Hydroelectric dam diagram The waters of Llyn Stwlan, the upper reservoir of the Ffestiniog Pumped-Storage Scheme in north Wales, can just be glimpsed on the right. ... This article or section does not adequately cite its references or sources. ... 1934 (MCMXXXIV) was a common year starting on Monday (link will take you to calendar). ... 1968 (MCMLXVIII) was a leap year starting on Monday. ... Combatants Allied powers: China France Great Britain Soviet Union United States and others Axis powers: Germany Italy Japan and others Commanders Chiang Kai-shek Charles de Gaulle Winston Churchill Joseph Stalin Franklin Roosevelt Adolf Hitler Benito Mussolini Hideki Tōjō Casualties Military dead: 17,000,000 Civilian dead: 33,000... Capital Hobart Government Const. ...

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. ^[6] Tasman Bridge from Mt Nelson The Tasman Bridge is a five-lane bridge crossing the Derwent River, near the CBD of Hobart, Tasmania. ... The Bowen Bridge in Tasmania was built with Federal funds following the collapse of the Tasman Bridge in 1975. ... The Bridgewater Bridge and Causeway is a vertical-lift bridge in Tasmania, Australia spanning the Derwent River with a specially built causeway connecting the bridge and the east bank of the river. ... The Hobart Bridge was a pontoon bridge that crossed the River Derwent, connecting the eastern and western Shores of the City of Hobart for the first time. ...

There was a thriving whaling industry until the 1840s when the industry rapidly declined due to over-exploitation. ^[7]

The 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. ^[4] 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. ^[4] Lutana is a suburb of Hobart, Tasmania, Australia. ... Boyer (Australian postcode 7140) is a town on the eastern side of the Derwent River (Tasmania), opposite and slightly downstream of New Norfolk. ...

References

1. ^ Etymology of Cumbrian Place Names#Rivers
2. ^ Names of Rivers
3. ^ Celtic Place Names
4. ^ ^{a b c d} State of the Derwent Estuary report (3.89 MB PDF)
5. ^ http://www.hydro.com.au/Storages/Storage.pdf
6. ^ Parliament of Tasmania History site - Hobart to Tasman Bridge
7. ^ A History of Shore-Based Whaling

• Derwent Estuary Program

The county of Cumbria in the north west of England has a long and complex history of human settlement. ...

External link

• Upper Derwent Issues