Nature conservation

Biodiversity Reform

Riverina - subregions

Subregions of the Riverina Bioregion
SubregionGeologyCharacteristic landformsTypical soilsVegetation
LachlanQuaternary alluvial sediments. Clay dominant. Groundwater lakes present. Lower river discharge than other streams.Complex alluvial fan with numerous distributary channels and floodplains, depression plains, and abandoned lake beds with lunettes. Limited source-bordering dunes.Red and brown clays, red brown texture contrast soils on levees and terraces, minor deep sands. Black box and river red gum on channels. Black box, lignum and cane grass in swamps. Saltbush and bluebush with old man saltbush, cottonbush, myall and grasses on the plains. White cypress pine on sandhills.
MurrumbidgeeQuaternary alluvial sediments. Clay and sand with source bordering dunes and lakes. Alluvial fan with distributary channels and floodplains, undulating plains with depressions. Source-bordering dunes common.Red brown earths, grey and brown clays and deep siliceous sands on dunes.River red gum and river cooba on channels. Black box, lignum and old man saltbush on floodplains. Myall and old man saltbush with other saltbush and grasses formerly widespread on backplains. White cypress pine on dunes.
Murray Fans Quaternary alluvial sediments. Clay and sand with source bordering dunes, lakes and swamps.Relatively confined alluvial fan constrained by sediments from northern Victorian rivers, the Murrumbidgee fan and the Cadell fault.

 

 

Meandering channels, floodplains, source-bordering dunes, overflow lakes and swamps.

Red brown earths, grey clays and deep sands.Extensive river red gum forests with river cooba on channels and low floodplains. Yellow Box and black box with saltbush on high floodplains and terraces. White cypress pines on dunes, sandy levees and lunettes.

 

 

Common reed, cumbungi and grasses in swamps.

Robinvale PlainsQuaternary alluvial sediments. Clay dominant. Small overflow lakes.Narrow floodplain with meandering channels, billabongs, levees and low dunes. Overflow lakes with lunettes. Red brown earths, grey clays, deep sands and yellow texture contrast soils.River red gum on channels. Black box, river cooba, oldman saltbush, belah and lignum on floodplains. White cypress pine, mallee acacias and bluebush on lunettes and sand dunes.
Murray Scroll BeltQuaternary alluvial sediments. Clay dominant, wider plains with larger overflow lakes and salinas. Affected by higher water salinity and summer floods from the Darling River.Wider floodplain with meandering channels, billabongs, levees and low dunes. Large overflow lakes with large lunettes. Red brown earths, grey clays, deep sands and yellow texture contrast soils.River red gum on channels and lake margins. Black box, river cooba, oldman saltbush, belah and lignum on floodplains. White cypress pine, mallee acacias and bluebush on lunettes and sand dunes.


From Morgan and Terrey 1992

Documents to download


Next page: Riverina - references
Previous page: Riverina - bioregional-scale conservation
Up to contents page: Riverina Bioregion
Page last updated: 26 April 2016