Oum Er-Rbia River

Oum Er-Rbia (Arabic: أم الربيع‎, "the mother of springtime"; Berber: وانسيفن; Portuguese: rio Morbeia) Arabic spelling Oum el- rbia, is a large, long and high-throughput river in central Morocco.

Oum Er-Rbia
Location of the Oum Er-Rbia River in Morocco
Location
Country	Morocco
Physical characteristics
Source
• location	Middle Atlas
Mouth
• location	Atlantic Ocean
Length	555 km (345 mi)
Discharge
• average	105 m3/s (3,700 cu ft/s)

The river is 555 kilometres (345 mi) long.[1] With an average water throughput of 105 m³/s, Oum Er-Rbia is the second-largest river in Morocco after the Sebou River. It originates in the Middle Atlas and passes through the city of Khénifra, arriving at its mouth at the Atlantic Ocean at the port of Azemmour, located on its left bank. Oum Er-Rbia has six dams, the most important of which is Al Massira Dam. Its most important tributaries are El-Abid River, Tessaoute River, and Lakhdar River.

The historical Berber nickname of the river was Asif n Isaffen, meaning "the river of rivers". According to scholars, the original Berber common name of the river is Wansifen and was only changed recently, circa 16th or 17th century, and a nearby village called Oum Rabia might have influenced this change.[2]

Oum Er-Rbia is fed by a large number of groundwater springs. The area near its headwaters is called "The Forty Springs" as a result, although that is a poetic term rather than an exact count.[1]