LocalitiesLaunceston City
Type AreaRoyal Park, Launceston
Grid Reference41° 26’ 10.77” S; 147° 07’ 54.90” E; Elevation 6m ASL
Geology Sheet 1:25 000 Launceston (Forsyth and Calver 2005)
Confidence LevelHigh
Land Salinity
Salt Export
Water Salinity


The Invermay Hydrogeological Landscape (HGL) is characterised by low plains and terrace landforms adjacent to the Tamar Estuary and the North Esk River. This HGL is located under the central business district (CBD) of Launceston and extends to the north along the eastern side of the Tamar Estuary. This is an area of moderate rainfall (680 mm). This HGL forms a low-lying area that is strongly influenced by Quaternary to Recent processes of the Tamar Estuary and North Esk River.

Typical lithologies for this HGL are Late Cenozoic terrace deposits and Quaternary to Recent poorly-consolidated clayey silt, silt, sand and some gravel. The landscape consists of low plains and terrace landforms (typically <10m, but up to 20m).

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