Back Blau (suba sa Alemanya) CEB Блау (юханшыв) CV Blau Danish Blau (Donau) German Blau (affluent du Danube) French Blau (fiume) Italian Blau NN Blau NB Blau (rzeka) Polish Блау (река) Russian
| Blau | |
|---|---|
&sq=Facebook&lang=en&file=File:Ulm_27_-_Blau.JPG) The Blau in Ulm's historic "Fischerviertel", about 300 m before it flows into the Danube | |
 | |
| Location | |
| Country | Germany |
| State | Baden-Württemberg |
| Physical characteristics | |
| Mouth | |
• location | Danube |
• coordinates | 48°22′48″N 9°47′10″E / 48.38°N 9.7861°E |
| Length | 22.2 km (13.8 mi) [1] |
| Basin size | 499 km2 (193 sq mi) [1] |
| Basin features | |
| Progression | Danube→ Black Sea |
&sq=Facebook&lang=en&file=File:Eugen_Felle_Ulm_mit_Blautal.jpg)
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.