List of tributaries of the Danube
The Danube is Europe's second-longest river. It starts in the Black Forest in Germany as two smaller rivers—the Brigach and the Breg—which join at Donaueschingen, and it is from here that it is known as the Danube, flowing generally eastwards for a distance of some , passing through several Central and Eastern European capitals, before emptying into the Black Sea via the Danube Delta in Romania.
Kammel
The Kammel is a river in Bavaria, southern Germany. The Kammel originates west of Mindelheim, in the district Unterallgäu, and flows generally north. It flows into the Mindel (left tributary) south of "Offingen at the Danube", east of Günzburg in the district Günzburg. So it is an indirect right tributary of the Danube. The difference in altitude between the origin and the mouth is 265 m.