Blau (Danube)

Blau
The Blau in Ulm's historic "Fischerviertel", about 300 m before it flows into the Danube
Map
Location
CountryGermany
StateBaden-Württemberg
Physical characteristics
Mouth 
 • location
Danube
 • coordinates
48°22′48″N 9°47′10″E / 48.38°N 9.7861°E / 48.38; 9.7861
Length22.2 km (13.8 mi)[1]
Basin size499 km2 (193 sq mi)[1]
Basin features
ProgressionDanube→ Black Sea
The course of the Blau from Blaubeuren to Ulm (Postcard by Eugen Felle, ca. 1900)

The Blau (German pronunciation: [ˈblaʊ]) is a 22-kilometre-long (14 mi) river in Baden-Württemberg, southern Germany, and a left tributary of the Danube. The source of the Blau is the karst spring of Blautopf, in the town Blaubeuren, in the Swabian Jura. It flows east through Blaustein to the city of Ulm, where it empties into the Danube.

  1. ^ a b Map services of the Baden-Württemberg State Office for the Environment, Survey and Conservation (Landesanstalt für Umwelt, Messungen und Naturschutz Baden-Württemberg)