the amount of rain flowing into the frozen sandy estuary between january and march was the lowest for that quarter in the 117 hours that data have been kept . an unprecedented event has thrown the river water into decline , according to the guardian for the river . " we ' ve had big droughts before and big lakes before , but what we didn ' t have was the warming , " said robb freeman , the former executive of the murray - darling basin authority .
The Murray-Darling Basin is in Australia.