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Salinity Province 55, Knowsley

Thumbnail image showing the location of the Knowsley Salinity Province in VictoriaThe Knowsley Salinity Province is a small province with a number of relatively small areas of mapped salt affected land. The underlying hydrogeology consists of local scale Groundwater Flow Systems in fractured and weathered meta-sedimentary Palaeozoic rocks and Permian glacial sediments (Tillites). Dryland salinity has developed along drainage lines associated with deep erosional gullies within the poor soil development of the undulating Tillite hills, including a number of watercourses that drain into the Campaspe River and Lake Eppalock. A transect of bores monitoring groundwater levels at two main discharge sites have shown the groundwater level has remained high even through the 10 years of drought between 1999 and 2009.

Discharge areas have mostly been successfully revegetated with Tall Wheat Grass, Phalaris and small groves of Salt Bush. Some significant upslope tree planting has also been completed on the rocky ridges in an attempt to control recharge.

Province Attributes

Catchment Management Region:NORTH CENTRAL
Priority Status:High
Province Area:34,200 ha
Recorded Soil Salinity Area 1:155 ha
Dominant Surface Geology Type:Sedimentary
Influence of Geological Structure on Salinity Occurrence/s:Possible
Relevant Geomorphological Mapping Units (GMUs):2.1.2
Predominant Groundwater Flow Systems (GFSs):Local
Relevant Irrigation Areas:N/A

Knowsley Salinity Province Map

A detailed map showing the Knowsley Salinity Province

Links to further reading and material related to the North Central Salinity Province
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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