| 100% | SILT | 4 | Sand deposited by river flow |
| 50% | SILT | 4 | Mud deposited by a river |
| 50% | SILT | 4 | Soil deposited by flowing water |
| 47% | NEVA | 4 | River that flows by the Hermitage |
| 45% | ALLUVIUM | 8 | Silty deposits left by flowing water |
| 45% | SILT | 4 | Mud, clay, or small rocks deposited by a river or lake |
| 40% | SANDDUNE | 8 | Large hill of sand made by wind flows |
| 38% | DAM | 3 | River flow controller |
| 37% | DAM | 3 | River flow-stopping project |
| 37% | DAM | 3 | River flow-blocking structure |
| 37% | DAM | 3 | River flow-controlling structure |
| 37% | ELBE | 4 | River flowing through Hamburg |
| 37% | CLYDE | 5 | River flowing through Glasgow |
| 37% | RHONE | 5 | River flowing through Lyon |
| 37% | FLEET | 5 | River flowing under london |
| 37% | YSER | 4 | River flowing from Buysscheure |
| 37% | ORINOCO | 7 | River flowing through Venezuela |
| 37% | NILE | 4 | River flowing through Egypt |
| 37% | DANUBE | 6 | River flowing through vienna |
| 36% | EBB | 3 | Rivers do this and flow |
| 36% | AISNE | 5 | River flowing into the Oise |
| 36% | NEVA | 4 | River flowing through St Petersburg |
| 36% | SIRET | 5 | River flowing from the Carpathian mountains |
| 36% | NIAGARA | 7 | River flowing between two Great Lakes |
| 36% | IOWA | 4 | River flowing SE to the Mississippi |
| 36% | SNAKE | 5 | River flowing from Yellowstone National park |
| 36% | ELBE | 4 | River flowing through Dresden and Hamburg |
| 36% | TRIBUTARY | 9 | River flowing into a larger one |
| 36% | VLATAVA | 7 | River flowing through the Czech Republic |
| 36% | ARAGUAIA | 8 | River flowing north from central Brazil |