17.2 River outflow from the region
The volumetric value for the line item for the whole region for the 2010–11 year was 12,849,073 ML. This was the river outflow from SA Murray sustainable diversion limit (SDL) area to the sea estimated at the barrages.
The same volume applies as the river outflow from the Southern Basin. The river outflows from the Northern Basin into the Southern Basin were 1,840,333 ML. This was the inflow from the Barwon–Darling watercourse SDL area into the Lower Darling SDL area calculated at the upstream end of Menindee Lakes.
Flows into Menindee Lakes from the Barwon-Darling watercourse were based on metered discharge data and subsequent calculations.
Flows through the barrages were estimated based on the number of barrages open, the duration of their opening and the flow rates across the barrages.