The Oued el Khatt is an intermittent river and wadi

Wadi

Wadi is the Arabic term traditionally referring to a valley. In some cases, it may refer to a dry riverbed that contains water only during times of heavy rain or simply an intermittent stream.-Variant names:...

 which rises in central Western Sahara

Western Sahara

Western Sahara is a disputed territory in North Africa, bordered by Morocco to the north, Algeria to the northeast, Mauritania to the east and south, and the Atlantic Ocean to the west. Its surface area amounts to . It is one of the most sparsely populated territories in the world, mainly...

, close to the border with Mauritania

Mauritania

Mauritania is a country in the Maghreb and West Africa. It is bordered by the Atlantic Ocean in the west, by Western Sahara in the north, by Algeria in the northeast, by Mali in the east and southeast, and by Senegal in the southwest...

. The course of the wadi is initially southwesterly, turning north after its junction with the Oued Zbayra wadi close to the small settlement of Dhaym al-Khayl. From here it runs north for some 200 kilometres before joining with the intermittent Saguia el-Hamra

Saguia el-Hamra

Saguia el-Hamra, in Arabic الساقية الحمراء, al-Saqiyah al-Hamra'a , is, with Río de Oro, one of the two territories that formed the Spanish province of Spanish Sahara after 1969. Its name comes from a waterway that goes through the capital....

 just south of Laayoune on the Atlantic coast.