Seybouse River
Seybouse is a river in northeastern Algeria, near the border with Tunisia. In Roman times, it was called the Ubus.Course
The river runs for about, flowing through Guelma and Annaba Provinces. It starts in Medjez Amar, in the Tell Atlas north-west of Guelma Province. Its flows into the Mediterranean Sea at Seybouse to the south-east of the city of Annaba. Its mouth is just north of Sidi Salem, the site of Hippo Regius where Saint Augustine lived in AD 391–430.
The Seybouse is used for irrigation of agricultural areas, but it is becoming polluted because of industrial activities.Characteristics
| Element | Amount |
| Flow | 11.5 m³/s |
| Temperature | 21.41 °C |
| pH | 8.21 |
| Oxygen saturation | 36.61% |
| DBO1 | 18.33 |
| DCO² | 124.3 |
| Nitrates | 5.58 |
| PO4−3 | 2.29 |
| Ammonium | 9.18 |
