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| Great Lake (Tasmania) | |
|---|---|
| Name | Great Lake |
| Location | Central Highlands, Tasmania, Australia |
| Type | Reservoir |
| Basin countries | Australia |
| Area | 176 km2 |
| Elevation | 1,031 m |
Great Lake (Tasmania) Great Lake is a large freshwater reservoir in the Central Highlands of Tasmania. Positioned on the Central Plateau near Lake Echo and Lake Sorell, it is one of Tasmania's highest and most extensive inland waters, notable for its role in regional hydrology, hydroelectricity, and recreational angling. The lake sits within a landscape shaped by glaciation, Aboriginal history, and 20th-century engineering projects.
Great Lake occupies a central position on the Central Plateau (Tasmania), bordered by features such as Cradle Mountain, Ben Lomond, Mount Wellington, Walls of Jerusalem National Park and Central Plateau Conservation Area. Hydrologically it connects with rivers and lakes including the River Derwent (Tasmania), Mersey River, South Esk River, Lake Echo (Tasmania), Lake Sorell and Arve River. The catchment includes tributaries from ranges like the Great Western Tiers, Du Cane Range, Western Tiers and Elderslie Range (Tasmania), influencing inflow patterns together with climate controls from the Roaring Forties and Southern Ocean. The lake is fed by runoff from alpine basins such as Liawenee, Miena, Apsley River headwaters and seasonal snowmelt from Cradle Mountain-Lake St Clair National Park environs. Outflow is regulated to the Derwent River system via structures tied to the Hydro-Electric Commission (Tasmania), managing storages that include Lake Echo, Lake King William, and Lake St Clair. Bathymetric and limnological characteristics reflect influences seen in lakes like Lake Baikal, Lake Titicaca, and Lake Como in terms of cold-water stratification, though on a much smaller scale. Elevation, wind fetch across open water and episodic freeze-related events mirror conditions found at Loch Lomond, Lake District (England), and Lake Wanaka.
The plateau around Great Lake has been part of the traditional lands of Aboriginal Tasmanian groups associated with sites such as Nuenonne and riverine routes used in antiquity, paralleling histories evident at Port Davey and Bruny Island National Park. European exploration during the 19th century by figures connected to expeditions like those of John Glover (artist), James Backhouse, Robert Brown (botanist), and surveyors associated with Van Diemen's Land led to pastoral leases and miners arriving during episodes comparable to the Tasmanian gold rushes. Early 20th-century initiatives by the Hydro-Electric Commission (Tasmania) and engineers influenced by international projects such as the Hoover Dam and Aswan Low Dam transformed the natural basins into a regulated reservoir, with construction phases linked to works on Miena Dam, Shannon Power Station, and schemes that fed the Derwent Valley Power Scheme. Conservation movements connected to agencies like the National Trust of Australia (Tasmania) and legislative instruments from the Tasmanian Government shaped later management and protections.
Great Lake supports assemblages of cold-water fauna and flora comparable to communities studied at Lake Tahoe and Loch Ness. Native species in surrounding wetlands include populations similar to those in Freycinet National Park and Maria Island National Park, with vegetation types such as buttongrass moorlands seen across the Tasmanian Wilderness World Heritage Area, alongside alpine herbfields reminiscent of Ben Lomond National Park. Aquatic fauna comprises introduced trout species related to introductions elsewhere like River Tweed fisheries and influences from anglers tied to traditions at Lake District (New Zealand). Birdlife includes waterfowl and shorebirds comparable to species recorded at King Island, Mud Islands, Bruny Island, and migratory patterns documented at Corner Inlet. Terrestrial mammals and marsupials in the catchment reflect assemblages similar to those at Maria Island, Mt Field National Park, and Freycinet Peninsula, with habitat pressures paralleling those addressed in reserves such as Southwest National Park, Mount William National Park and Cradle Mountain-Lake St Clair National Park.
Great Lake is a focal point for angling communities linked to clubs and events modeled on traditions from Bass Strait islands and fisheries in the River Derwent (Tasmania). Recreational activities include trout fishing, camping, boating and cross-country skiing in adjacent highland areas, drawing visitors from population centres like Hobart, Launceston, Devonport, Burnie and towns such as Miena, Liawenee, Poatina and Arthurs Lake (Tasmania). Tourism promotion aligns with itineraries that include Cradle Mountain, Tamar Valley, Freycinet Peninsula and heritage routes like the Tasmanian Wilderness World Heritage Area circuit. Accommodation and services reflect enterprises similar to those operating in Strahan, St Helens, Coles Bay, and facilities run by operators influenced by models from Parks Australia and regional councils.
Great Lake is integral to Tasmania's hydroelectric network, functioning as a regulated storage linked to schemes operated historically by the Hydro-Electric Commission (Tasmania) and presently under arrangements influenced by corporations and regulatory bodies akin to Hydro Tasmania and state energy planning agencies. The lake's levels are managed to support power stations including those comparable in purpose to Poatina Power Station and reservoirs such as Lake Burbury and Lake Echo (Tasmania), integrating flood mitigation, irrigation support, and environmental flow considerations similar to regimes at Murray-Darling Basin storages. Engineering practices for dam safety, sediment management and catchment rehabilitation draw on standards and research from institutions such as the University of Tasmania, industry groups like the Engineers Australia and conservation advice from organisations like the Australian Conservation Foundation.
Settlements around the lake include hamlets and service centres such as Miena, Liawenee, Swansea-linked supply routes and access nodes connected by highways and roads comparable to the Lyell Highway, Midland Highway, Esk Highway and local tracks leading to highland huts and facilities managed in a manner similar to national park infrastructure at Ben Lomond National Park and Walls of Jerusalem National Park. Access is seasonal, with weather influenced by patterns affecting travel to other alpine localities like Mt Hotham and Falls Creek (Victoria), and emergency responses coordinated with agencies like Tasmania Police and State Emergency Service (Australia). The area’s cultural and economic links extend to markets and institutions in Hobart, Launceston, Queenstown (Tasmania), and visitor services modeled after operations in Cradle Valley and Maria Island.
Category:Lakes of Tasmania