| Tributary | Area | Annual Flow | Apr.- Jun. Flow | Jul.- Aug. Flow |
| acres | cfs | cfs | cfs | |
| Pomme de Terre | 581,083 | 110 | 226 | 74 |
| Lac Qui Parle | 478,551 | 134 | 311 | 67 |
| Chippewa | 1,325,810 | 315 | 683 | 228 |
| Yellow Medicine | 698,340 | 123 | 282 | 68 |
| Redwood | 459,213 | 125 | 256 | 72 |
| Cottonwood | 840,513 | 322 | 632 | 190 |
| Watonwan | 541,826 | 336 | 655 | 239 |
| Blue Earth | 774,115 | 606 | 1314 | 481 |
| Le Sueur | 705,216 | 476 | 993 | 361 |
Last Updated: January 09, 1996