| River | Average discharge (m3/s) at mouth |
|---|---|
| 01 Fly | |
| 02 Mamberamo | |
| 03 Sepik | |
| 04 Digul | |
| 05 Eilanden | |
| 06 Purari | |
| 07 Kikori | |
| 08 Bamu | |
| 09 Ramu | |
| 10 Mitchell | |
| 11 Clutha | |
| 12 Waiau | |
| 13 Turama | |
| 14 Momats | |
| 15 Buller | |
| 16 Murray | |
| 17 Normanby | |
| 18 Wapoga | |
| 19 Waikato | |
| 20 Burdekin | |
| 21 Bian | |
| 22 Kamundan | |
| 23 Markham | |
| 24 Lorentz | |
| 25 Grey | |
| 26 Daly | |
| 27 Waitaki | |
| 39 Rewa (Fiji) |