The Senegal River (Arabic: نهر السنغال, romanized: Nahr as-Siniġāl, French: Fleuve Sénégal, Wolof: Dexug Senegaal) is a 1,086 km (675 mi) long river in West Africa; much of its length marks part of the border between Senegal and Mauritania. It has a drainage basin of 270,000 km2 (100,000 sq mi), a mean flow of 680 m3/s (24,000 cu ft/s), and an annual discharge of 21.5 km3 (5.2 cu mi). Important tributaries are the Falémé River, Karakoro River, and the Gorgol River. The river divides into two branches once it passes Kaédi The left branch, called the Doué, runs parallel to the main river to the north. After 200 km (120 mi) the two branches rejoin a few kilometers downstream of Podor.