Gabas (river)
The Gabas (; ) is a left tributary of the Adour, in the Landes, in the Southwest of France. It is  long. Name 
The name Gabas is derived from the French gave (Gascon: 'gabe'), which in the Pyrenees generically describes a small or large watercourse. The river was known as the fluvius gavasensis in 982. A tributary of the Léez is named the Gabassot, a hypocoristic of Gabas. Geography 
The Gabas rises in the plateau of Ger in the north of Lourdes, as the union of the Gabastou and the Honrède. It flows north-west like the neighboring rivers: the Luy, the Uzan and the Ousse. The Gabas crosses the Tursan, in the Landes. It flows into the Adour in Toulouzette, downstream from Saint-Sever. A dam of  was built in its upper course to regulate the lowest water level. Main tributaries 
 (R) the Bayle from Lourenties
 (R) the Bas, from Geaune
 (R) the Lescoû, from Saint-Loubouer
 (L) the Petit Bas, from Pimbo
 (L) the Laudon, from Hagetmau

References

Rivers of France
Rivers of Landes (department)
Rivers of Nouvelle-Aquitaine
Nouvelle-Aquitaine region articles needing translation from French Wikipedia