Growing about one third of all of Australia's food and supplying much of Adelaide's water, the Murray Darling basin faces continued drought.
To keep environmentalists happy, about 38 gigalitres of freshwater is diverted from the system every year and sent down the Snowy River. This is equivalent to 16872 Olympic swimming pools over the year or two Olympic swimming pools released per hour - most of it making the short journey back to the ocean.
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