Limited water availability in the face of increasing competing demands for water; including water for environmental purposes, has highlighted the need to make the most efficient use of the available water in the Murray Darling Basin. This study forces on the Murrumbidgee Irrigation Area (MIA) and considers the benefits of increasing irrigation efficiency. A model of the MIA which incorporates both on and off farm components is used to evaluate the benefits of adopting two on-farm options-twin furrow irrigation for horticultural farms and water reuse systems for horticulture and broadacre farms. The study found these on-farm water saving options can be profitably adopted leading to savings of river diversions of up to 27 GL a year.


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