Ardèche is a tributary of the river that has a mouth at what body of water?
Ardèche (river) The Ardèche (Occitan: "Ardecha" ) is a 125 km long river in south-central France, a right-bank tributary of the River Rhône. Its source is in the Massif Central, near the village of Astet. It flows into the Rhône near Pont-Saint-Esprit, north-west of Orange. The river gives its name to the French department of Ardèche.
Gardon The Gardon or Gard (Occitan and French: "Gardon, Gard") is a river in southern France. It is the namesake of the department of Gard. Several of its tributaries are also called "Gardon".