| 1 | The Changjiang River divides at its mouth and forms a delta. | |
| 2 | The Nile divides at its mouth and forms a delta. | |
| 3 | Jackson pointed to the mouth of the San Jacinto River. | |
| 4 | The ship has touched bottom the estuary must be shallower than we thought. | |
| 5 | The answer was to block certain estuaries leading to Antwerp and Rotterdam. |