Ardèche is a tributary of the river that has a mouth at what body of water?
Rhône The Rhône ( ; French: "Le Rhône" ] ; German: "Rhone" ] ; Walliser German: "Rotten" ; Italian: "Rodano" ] ; Arpitan: "Rôno" ] ; Occitan: "Ròse" ] ) is one of the major rivers of Europe and has twice the average discharge of the Loire (which is the longest French river), rising in the Rhône Glacier in the Swiss Alps at the far eastern end of the Swiss canton of Valais, passing through Lake Geneva and running through southeastern France. At Arles, near its mouth on the Mediterranean Sea, the river divides into two branches, known as the Great Rhône (French: "Le Grand Rhône") and the Little Rhône ("Le Petit Rhône"). The resulting delta constitutes the Camargue region.
Valea Veche River The Valea Veche is a tributary of the Pârâul Moale in Romania.