| Answer | Crossword Clue |
|---|---|
| DELTA | River mouth phenomenon |
| SILTING | River phenomenon. |
| FALLS | River phenomenon |
| BAYOU | Louisiana river phenomenon |
| FALLS | Zambezi river phenomenon. |
| ICERUN | Spring river phenomenon |
| CANYON | Phenomenon of the Colorado River. |
| FALLS | Phenomenon of the Zambezi River. |
