Gippsland Lakes
The Gippsland Lakes are a network of lakes, marshes and lagoons in east Gippsland, Victoria, Australia covering an area of about 600 km2. The largest of the lakes are Lake Wellington (Gunai language: Murla[1]), Lake King and Lake Victoria. They are fed by the Avon, Thomson, Latrobe, Mitchell, Nicholson and Tambo rivers.
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[edit] History
The lakes were formed by two principal processes. The first is river delta alluvial deposition of sediment brought in by the rivers which flow into the lakes. Silt deposited by this process forms into long jettys which can run many kilometres into a lake, as exemplified by the Mitchell River silt jetties that run into Lake King. The second process is the action of sea current in Bass Strait which created the Ninety Mile Beach and cut off the river deltas from the sea.
Once the lakes were closed off a new cycle started, whereby the water level of the lakes would gradually rise until the waters broke through the barrier beach and the level would drop down until it equalised with sea-level. Eventually the beach would close-off the lakes and the cycle would begin anew. Sometimes it would take many years before a new channel to the sea was formed and not necessarily in the same place as the last one.
In 1890 a wall was built to fix the position of a naturally occurring channel between the lakes and the ocean at Lakes Entrance, to stabilise the water level, create a harbour for fishing boats and open up the lakes to shipping. This entrance needs to be dredged regularly, or the same process that created the Gippsland Lakes would render the entrance too shallow for seagoing vessels to pass through.
Due to the flooding, in 2011, Gippsland Lakes were experiencing bioluminescence.[2]
[edit] Environment
The lakes support numerous species of wildlife and there exist two protected areas within: The Lakes National Park and Gippsland Lakes Coastal Park. The Gippsland Lakes wetlands are protected by the international Ramsar Convention on wetlands. There are also approximately 400 indigenous flora species and 300 native fauna species. Three plants, two of them being orchid species, are listed as endangered.
[edit] Burrunan dolphins
The lakes are home to about 50 of the recently described species of Bottlenose dolphin, the Burrunan dolphin (Tursiops australis). The other 150 or so of this rare species are to be found in Port Phillip.[3]
[edit] Birds
The wetlands provide habitat for about 20,000 waterbirds – including birds from as far afield as Siberia and Alaska. The lakes have been identified by BirdLife International as an Important Bird Area (IBA) because they regularly support over 1% of the global populations of Black Swans, Chestnut Teals and Musk Ducks, as well as many Fairy Terns.[4]
[edit] Geography
The Gippsland Lakes are, in order of size:
- Lake Wellington
- Lake Victoria
- Lake King
- Lake Reeve
- Lake Tyers
- Lake Coleman
[edit] See also
[edit] References
- ^ Wurruk: by Vaughan Nikitin, ChaosFilter.com Online Publishing, A Story Written in an Aboriginal Ganai - Kurnai - Language - Mountain Cattlemen - Victoria - Gippsland - Aboriginal History, Myth, Legend
- ^ http://philhart.com/content/bioluminescence-gippsland-lakes
- ^ Researcher discovers new dolphin species in Victoria, Monash University, 15 September 2011.
- ^ "IBA: Gippsland Lakes". Birdata. Birds Australia. http://www.birdata.com.au/iba.vm. Retrieved 2011-06-24.
[edit] External links
Media related to East Gippsland at Wikimedia Commons
- Gippsland Lakes Coastal Park
- Gippsland Coastal Board
- The Lakes National Park & Gippsland Lakes Coastal Park Plan
- Gippsland Ports Authority
Coordinates: 38°00′S 147°39′E / 38°S 147.65°E
