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| Liawenee River | |
|---|---|
| Name | Liawenee River |
| Country | Australia |
| State | Tasmania |
| Region | Central Highlands |
| Source | Great Western Tiers |
| Source location | Central Plateau |
| Mouth | Shannon River |
| Mouth location | Lake Echo area |
| Length km | 50 |
| Basin countries | Australia |
Liawenee River The Liawenee River is a highland perennial river in the Central Highlands of Tasmania, Australia. Located within the Tasmanian Wilderness and flowing through alpine plateau terrain, it contributes to the River Shannon catchment and feeds several hydrographic infrastructures in the region. The river lies near protected areas and is associated with a range of geographic, ecological, and cultural features in Tasmania.
The Liawenee River rises on the Central Plateau near the Great Western Tiers, flowing generally south-eastward through the Central Highlands and passing adjacent to Liawenee, Tasmania and Miena before joining the South Esk River tributary system and ultimately contributing to the Derwent River catchment via the Shannon River and Lake Echo storage network. Along its course the river traverses or skirts notable geomorphological features including the Central Plateau Conservation Area, the Cradle Mountain–Lake St Clair National Park buffer zone, and multiple alpine flats near Great Lake and Tarraleah. The river’s channel is bounded by features associated with the Tasmanian Central Plateau World Heritage Area and lies within landscapes influenced by glaciation contemporaneous with Pleistocene events such as those documented around Mount Field and Ben Lomond. Access roads include routes from Nook, Ouse and the Highland Lakes Road that links to hydro-electric installations such as those managed by the Hydro-Electric Corporation.
The Liawenee River exhibits seasonal discharge patterns influenced by alpine precipitation regimes recorded across the Central Plateau (Tasmania), with contributions from snowmelt, rainfall events tracked by the Bureau of Meteorology, and regulated outflows related to the Tasmanian Hydro-Electric Scheme. Water chemistry data typically reflect low conductivity and oligotrophic status similar to other upland Tasmanian streams studied by institutions like the University of Tasmania and monitoring conducted by the DPIPWE. Water quality indicators have been compared with benchmarks used in assessments by the Australian and New Zealand Environment and Conservation Council and the Commonwealth Scientific and Industrial Research Organisation in regional freshwater studies. The river’s flow regime is affected by impoundments and diversions connected to the Derwent hydroelectric power scheme and governance frameworks such as the Water Management Act 1999 (Tasmania). Historical flood events recorded in regional archives relate to climatic phenomena including the El Niño–Southern Oscillation and past extreme weather influenced by Southern Ocean patterns like the Southern Annular Mode.
The Liawenee River corridor supports montane and alpine ecosystems characteristic of the Central Highlands, hosting plant assemblages documented in the Tasmanian Wilderness World Heritage Area listings and research by the Tasmanian Land Conservancy. Vegetation communities include cushion plants, buttongrass moorland similar to that in Southwest National Park, and alpine heath found near Cradle Mountain. Faunal species observed in the catchment align with distributions of endemic and native taxa such as the Tasmanian devil, eastern quoll, and birdlife including wedge-tailed eagle and green rosella in nearby habitats. Freshwater biota include populations of the introduced brown trout and rainbow trout that are of recreational interest, alongside native fishes like Galaxias species and invertebrates comparable to those surveyed in studies by the Australian Bureau of Agricultural and Resource Economics. Riparian zones serve as habitat for amphibians such as the Tasmanian tree frog and invertebrate assemblages contributing to nutrient cycling noted in ecological reports from the Australian Museum and the Museum of Tasmania.
Traditional custodianship of the wider Central Plateau involves Aboriginal Tasmanian groups with cultural connections documented in records associated with sites around Lake St Clair and Bruny Island; archaeological and ethnographic research by the Tasmanian Aboriginal Centre and historians at the State Library of Tasmania inform this history. European exploration and settlement narratives link the river area to 19th-century figures and enterprises involved in pastoralism, mining near Mount Lyell and infrastructure development linked to the Derwent Valley and Tasman municipal histories. The river has supported recreational angling traditions tied to Trout fishing in Tasmania and tourism promoted by agencies such as Tourism Tasmania and local shires including the Central Highlands Council. Hydroelectric development during the 20th century by entities like the Hydro-Electric Commission (Tasmania) altered flow regimes, and transport routes built during periods of development connect to heritage listings in the Tasmanian Heritage Register.
Conservation and management of the Liawenee River involve multiple stakeholders including Parks and Wildlife Service (Tasmania), DPIPWE, local government, and non-government organisations such as the Tasmanian Land Conservancy and the Tasmanian Conservation Trust. Policies implementing the Nature Conservation Act 2002 (Tasmania) and water resource instruments under the Water Management Act 1999 (Tasmania) frame actions addressing invasive species, riparian restoration, and catchment planning that align with strategies from the Australian Government Department of Agriculture, Water and the Environment. Ongoing monitoring programs draw on expertise from the University of Tasmania, community science initiatives supported by groups like Landcare Australia, and best-practice guidance from the IUCN for protected area management. Threats addressed in management plans include impacts from introduced trout on native fish, altered flow from hydroelectric operations, and climate change projections modeled by the CSIRO and Bureau of Meteorology. Collaborative conservation efforts reference regional plans such as the Central Highlands Regional Strategy and engage with international obligations under frameworks related to the UNESCO World Heritage Convention where applicable.