The Rhine is the longest river in Germany. It is here that the Rhine encounters some more of its main tributaries, such as the Neckar, the Main and, later, the Moselle, which contributes an average discharge of more than 300 m3/s (11,000 cu ft/s). Northeastern France drains to the Rhine via the Moselle; smaller rivers drain the Vosges and Jura Mountains uplands. Most of Luxembourg and a very small part of Belgium also drain to the Rhine via the Moselle. As it approaches the Dutch border, the Rhine has an annual mean discharge of 2,290 m3/s (81,000 cu ft/s) and an average width of 400 m (1,300 ft).
Where does the Rhine encounter it's tributary the Neckar?  What is the average discharge of the Moselle to the Rhine? What is the longest river in Germany? What is a main tributary to the Rhine that goes through Northeastern France and part of Belgium? What is the average width of the Rhine? The Rhine is the longest river in what country? Which country does the Rhine encounter it's main tributaries? Which of the tributaries in Germany contributes most?  What country does the Moselle take the Rhine to? How much does the Rhine discharge at the Dutch border?