The average daily flow at McAlpine is 118,000 cubic feet per second (3,340 m3/s).
Flow is highly seasonal with the largest average monthly flows from July to September.
The river's average annual flow is 1,940 cubic meters per second.
And although complete August data will raise that total, the average monthly flow has plunged, to $3.5 billion, on this preliminary data.
The average monthly flow has seasonal variation and it at its highest in winter and spring.
The river carries an average annual flow of 21 cubic kilometers.
The average annual flow in the waterfall is 3 m/s.
The average monthly flows along the mainstream are listed in Table 3, providing an indication of their range and variability from year to year.
The maximum average daily flow on the river occurs between late March and early April.
Annual average flows measured at these sites ranged from 35 to 83 cubic feet per second (86-203 million liters/day).
