Tarn (river)

The Tarn is a river in southern France, tributary of the Garonne river. The Tarn and Tarn-et-Garonne departments are named after this river.
Geography.
The Tarn river has a length of and a drainage basin with an area of .
Its average yearly discharge (volume of water which passes through a section of the river per unit of time) is at Moissac, near the confluence with the Garonne, in the Tarn-et-Garonne department for a period of 57 years.
Average monthly discharge (m3/s) at Moissac
Course.
The source of the Tarn is on the Mont Lozère, in the Cévennes, southeastern Massif Central, in the "commune" of Le Pont-de-Montvert, Lozère department, at an altitude of about .
The Tarn flows to the southwest, in general, and passes through the following regions, departments and "communes":
The Tarn river flows through a total of 104 "communes".
Finally, it flows, as a right tributary into the Garonne near Moissac, in the Tarn-et-Garonne department, at of altitude.
Main tributaries.
The main tributaries, with a length greater than 25 km, of the Tarn are:
Left tributaries:
Right tributaries: