Sebou (
Berber:
Asif n Sbu, ) is a
river in northern
Morocco. At its source in the
Middle Atlas mountains it is known as the
Guigou River (Berber:
Asif n Gigu). The river is 496 kilometers long and has an average water flow of 137 m
3/s, which makes it the largest North African river by volume. It passes near the city of
Fes and discharges to the
Atlantic Ocean in
Mehdia. Sebou is navigable for only 16 km until the city of
Kenitra, which has the only
river port in Morocco. Its most important tributaries are the
Ouergha River,
Baht River and
Inaouen River. The river supports
irrigation in Morocco's most fertile region: the
Gharb.