Ariège (river)

The Ariège (; ) is a river in the south of France. It is long. It is a right tributary of the Garonne. The Ariège department is named after this river.
Geography.
The Ariège river is long. It has a drainage basin of .
Its average yearly discharge (volume of water which passes through a section of the river per unit of time) is at Pinsaguel, near the confluence with the Garonne, in the Haute-Garonne department, for a period of 30 years.
Average monthly discharge (m3/s) at Pinsaguel
Course.
The source of the Ariège is in the "Lac of Font Nègre", at the Pyrenees on the border between France and Andorra, just south of Pas de la Casa (Andorra) on the western side of the "Pics Orientaux de Font Nègre", in the "commune" of Porta, Pyrénées-Orientales department, at an altitude of about .
In its first part, it flows to the north, forming the border between France and Andorra, up to Pas de la Casa, and then turns to the north-east.
After flowing through the Ariège plain, the river gets out of the department of Ariège and into the department of Haute-Garonne and, finally, joins the Garonne river at Portet-sur-Garonne, near the city of Toulouse.
The Ariège flows to the northeast, in general, and passes through the following regions, departments and communes:
Andorra
France
The Ariège river flows through a total of 58 "communes".
Finally, it flows, as a right tributary, into the Garonne at Portet-sur-Garonne, in the Haute-Garonne department to the south of Toulouse, at of altitude.
Main tributaries.
Some of the tributaries are: