Salinity Province 48, Illabarook

Thumbnail image showing the location of Illabarook Salinity Province in Victoria The Illabarook Salinity Province is a middle sized Corangamite province having local-intermediate scale Groundwater Flow Systems (GFSs) in deeply weathered, fractured Palaeozoic rocks with some local scale GFSs found in an overlying veneer of sedimentary gravel caps on bedrock hills.

Mapped salinity occurrence is mainly confined to drainage lines and depressions where increased groundwater recharge has resulted in discharge along creeks and valley floors. In the Cape Clear area, significant soil erosion has resulted along some drainage lines.

Management of high watertable areas and saline soils needs to ensure suitable waterlogging and salt tolerant plants are protected from stock damage. In the Mount Mercer area, extensive forestry development around some formerly mapped saline areas is likely to have significantly reduced the salinity hazard in recent years.

Province Attributes

Catchment Management Region:	CORANGAMITE
Priority Status:	High
Province Area:	40610 ha
Recorded Soil Salinity Area ¹:	612 ha
Dominant Surface Geology Type:	Sedimentary
Influence of Geological Structure on Salinity Occurrence/s:	Definite
Relevant Geomorphological Mapping Units (GMUs):	2.1.5, 2.1.2
Predominant Groundwater Flow Systems (GFSs):	Local & Local/Intermediate
Relevant Irrigation Areas:	N/A

Illabarook Salinity Province Map

A detailed map showing Illabarook Salinity Province

Links to further reading and material related to the Corangamite Salinity Province

Groundwater Flow Systems (GFS) in the Corangamite CMR

For further information relating to groundwater levels and salinities in this Province please see: Visualising Victoria's Groundwater (VVG)

¹ Please Note: The ‘Recorded Soil Salinity Area’ indicated in the Salinity Province Attribute Table, comprises the total geographic area that has been mapped as having, or showing symptoms of, dryland soil salinity at some time (past or present). As dryland salinity occurrence in the Victorian landscape exhibits many different levels of severity and can change due to climate, landuse and vegetation, previously mapped areas may no longer be showing symptoms. In addition, as not all parts of the State have been mapped, or mapped in the same way, the mapping may not have captured some occurrences.

The soil salinity mapping used to calculate this ‘area’ does not cover irrigation regions. In irrigation regions, depth to watertable and watertable salinity mapping has been used to convey the threat of high watertables on soil waterlogging and/or soil salinisation and these areas are not included in this ‘area‘ calculation.

Please contact the Department, your Catchment Management Authority or your rural water provider for more information about salinity in your location.

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