Your gateway to a wide range of natural resources information and associated maps

Victorian Resources Online

Salinity Province 65, Loddon Plains

Thumbnail image showing the locatation of Loddon Plains Salinity Province in VictoriaThe Loddon Plains Salinity Province is the largest province in the North Central CMR covering over 250,000 ha. The north and central parts of the province are predominantly irrigation areas while dryland farming dominates the south. The province is underlain by a deeper, regional scale Groundwater Flow System (GFS) in the alluvial plains, including an extensive ‘deep lead’ (paleo-river channel) aquifer system. Local to intermediate scale GFSs in Quaternary alluvial, lake and lunette sediments overlies this. The deeper aquifer system exerts upward pressure on the overlying aquifer systems and discharge has occurred at deeply incised drainage lines eg. at Bears Lagoon and Serpentine. The deep lead can provide good quality water (~1500 ppm) for irrigation in places, while the overlying aquifer often has a shallow watertable and the groundwater is typically much more saline (6000+ ppm).

An extensive network of bores records groundwater levels in both the upper and lower aquifers and provides data to manage the deep lead resource and support Salinity Management Plans in the irrigation areas. More recent soil salinity mapping has indicated a much reduced area of salt affected land, probably due to the decade long period of drought from 1999 to 2009.

Province Attributes

Catchment Management Region:NORTH CENTRAL
Priority Status:High
Province Area:252,660 ha
Recorded Soil Salinity Area 1:533 ha
Dominant Surface Geology Type:Sedimentary
Influence of Geological Structure on Salinity Occurrence/s:Definite
Relevant Geomorphological Mapping Units (GMUs):4.2.X, 4.1.2
Predominant Groundwater Flow Systems (GFSs):Regional & Local/Intermediate
Relevant Irrigation Areas:Pyramid-Boort, Torrumbarry

Loddon Plains Salinity Province Map

A detailed map showing Loddon Plains 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.
Page top