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.
Meurthe (river) The Meurthe (] ) is a river in north-eastern France, right tributary to the river Moselle. Its source is in the Vosges mountains, near the Col de la Schlucht in the Vosges département, from where it flows in an overall north-westerly direction. Its name gave rise to the naming of the present French "département" Meurthe-et-Moselle and the former (before the change in the Franco-German border after the Franco-Prussian war of 1870) "département" Meurthe.