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Salinity Province 46, Horsham

Thumbnail image showing the location of the Horsham Salinity Province in VictoriaCentred on the major rural township, the large Horsham Salinity Province mainly covers the floodplain of the Wimmera river. Significant wetlands have developed along the Wimmera River in areas subject to flooding, which in wet years play a role in keeping watertables shallow by allowing surface water time to recharge the shallow aquifer system.

Salt affected land has mainly been mapped along drainage lines and natural evaporation basins, some of which are identified as Salinas, along the Wimmera River floodplain. Salinity occurrences are associated with the local scale Groundwater Flow Systems (GFSs) in aeolian sediments and with the intermediate scale GFS in the alluvial plains. Dryland cropping is the dominate landuse with grazing on annual pasture and stubble.

Management should seek to improve perennial plants in grazing areas and provide protection and native revegetation of saline areas.

Province Attributes

Catchment Management Region:WIMMERA
Priority Status:High
Province Area:147,110 ha
Recorded Soil Salinity Area 1:1,493 ha
Dominant Surface Geology Type:Sedimentary
Influence of Geological Structure on Salinity Occurrence/s:None
Relevant Geomorphological Mapping Units (GMUs):4.X, 5.X
Predominant Groundwater Flow Systems (GFSs):Local & Regional
Relevant Irrigation Areas:Horsham

Horsham Salinity Province Map

A detailed map showing the Horsham Salinity Province

Links to further reading and material related to the Wimmera 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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