Image: Wikimedia Commons

Blau

Sidestream of Danube

Placesource riverQ562302

Country: Germany
Located in: Baden-Württemberg
Elevation: 472 m
1
Sources
1.Stated in GeoNames
View statement on Wikidata ↗

Overview

From Wikipedia, the free encyclopedia · Read full article · Text CC BY-SA 4.0

The Blau 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.

Overview

All data

25 statements · 20% with external sources · numbers in brackets are citations

Mouth: Danube
Tributary: Lauter
Ach
Length: 22.2 km
Drainage basin: Danube basin
Watershed area: 487.898 km²
Discharge: 2.3 cubic metre per second
Different from: Blau
Origin of the watercourse: Blautopf

On other databases

10 identifiers linking Blau across the web's reference databases

48.4161, 9.7839OpenStreetMap ↗

Data quality

statements

20%

externally sourced

Source last edited August 10, 2026. AIDB refreshes this page daily.

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AIDB. (2026). Blau (Q562302). Retrieved from https://aidb.si/e/blau-Q562302