Guardian: The Murray-Darling basin is an enormous river catchment area centred on the Murray river, which runs along the Victoria-New South Wales border and ends in South Australia, and the adjoining Darling river, which stretches into NSW.
Covering around 1.06m square km, the basin encompasses around a seventh of Australia's landmass and is its most important agricultural region, containing nearly half of the nation's farms.
Fruit, vegetables, wool, dairy produce, wheat and livestock are produced in...