The medium sized Robinvale_Nyah Salinity Province covers 122,000 ha of the Murray corridor from Swan Hill to Robinvale, in which little salinity occurrence has been mapped. Underlain by a regional scale Groundwater Flow System (GFS) comprising marine and alluvial origin sediments, the salinity threat arises largely due to increased groundwater recharge from irrigation development adjoining the Murray River trench.
Local to intermediate scale GFSs in aeolian sediments that receive groundwater from the underlying regional aquifers are involved in saline groundwater seepage to the Murray River.
Management approaches have involved progressive changes to much higher irrigation efficiencies to reduce the recharge that causes salt loads to discharge to the Murray River. This also can reduce the salinity threat from high watertables to low lying inter-dune areas.
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