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Water levels, balance, and chemistry of Lake George, New South Wales

Created 16/10/2025

Updated 16/10/2025

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The marked water-level fluctuations of Lake George, a closed lake in southern New South Wales, have long been a subject of speculation. Monitoring over a 20-year period (1958-77) shows that the fluctuations are a response to seasonal and long-term variations in rainfall, evaporation and inflow of streams. An approximate water balance for the lake has been computed and shows marked seasonal characteristics; increases in water volume between May and October correspond with high inflows and low evaporation, while decreases in water volume between November and April correspond with low inflows and high evaporation. The long-term fluctuations reflect climatic variability. Salinity of the lake water, which is a sodium chloride type, varies inversely with water volume. A substantial net loss in salt was observed during a recessive phase of the lake in 1973.

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Additional Info

Field Value
Title Water levels, balance, and chemistry of Lake George, New South Wales
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/cc33ced9-ad07-4ece-9259-ad20c696bb4e
Contact Point
Geoscience Australia Data
clientservices@ga.gov.au
Reference Period 20/04/2018
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        149.35,
        -35.3
      ],
      [
        149.55,
        -35.3
      ],
      [
        149.55,
        -34.8
      ],
      [
        149.35,
        -34.8
      ],
      [
        149.35,
        -35.3
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Geoscience Australia

Data Source

This dataset was originally found on Geoscience Australia "Water levels, balance, and chemistry of Lake George, New South Wales". Please visit the source to access the original metadata of the dataset:
https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/water-levels-balance-and-chemistry-of-lake-george-new-south-wales