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About 6 per cent of Australia's total rainwater falls into the Murray-Darling Basin. About 85 per cent of all irrigation in Australia takes place in the basin, which supports an agricultural industry worth more than $9 billion per annum.
The Murray-Darling Basin covers 1,061,469 square kilometres (409,835 sq mi) or approximately one-seventh (14%) of the total area of Australia.
Over two million people live in the Basin.