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.
Lauchert
The Lauchert is a river in Baden-Württemberg, Germany, left tributary of the Danube. Its source is near Sonnenbühl, in the Swabian Alb. It is approx. 60 km long. It flows generally south through the small towns Gammertingen, Veringenstadt and Bingen. It flows into the Danube in Sigmaringendorf.