What is "brigach"

The Brigach is the shorter of two streams that jointly form the river Danube in Baden-Württemberg, Germany. The Brigach has its source at above sea level within St. Georgen in the Black Forest. The Brigach crosses the city Villingen-Schwenningen. from the source, the Brigach joins the Breg in Donaueschingen to form the Danube River.