Blau (Danube)
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The Blau () is a
river A river is a natural stream of fresh water that flows on land or inside Subterranean river, caves towards another body of water at a lower elevation, such as an ocean, lake, or another river. A river may run dry before reaching the end of ...
in
Baden-Württemberg Baden-Württemberg ( ; ), commonly shortened to BW or BaWü, is a states of Germany, German state () in Southwest Germany, east of the Rhine, which forms the southern part of Germany's western border with France. With more than 11.07 million i ...
, southern
Germany Germany, officially the Federal Republic of Germany, is a country in Central Europe. It lies between the Baltic Sea and the North Sea to the north and the Alps to the south. Its sixteen States of Germany, constituent states have a total popu ...
, and a left tributary of the
Danube The Danube ( ; see also #Names and etymology, other names) is the List of rivers of Europe#Longest rivers, second-longest river in Europe, after the Volga in Russia. It flows through Central and Southeastern Europe, from the Black Forest sou ...
. The source of the Blau is the
karst spring A karst spring or karstic spring is a Spring (hydrology), spring (exsurgence, outflow of groundwater) that is part of a karst hydrological system. Description Because of their often conical or inverted bowl shape, karst springs are also known i ...
of ''
Blautopf The Blautopf (German for ''Blue pot'') is a Spring (hydrosphere), spring that is considered the source of the river Blau (Danube), Blau in the karst landscape on the Swabian Jura's southern edge. It is located in Blaubeuren, Alb-Donau-Kreis, Bad ...
'', in the town
Blaubeuren Blaubeuren () is a town in the district of Alb-Donau near Ulm in Baden-Württemberg, Germany. it had 11,963 inhabitants. Geography Geographical location The core city Blaubeuren lies at the foot of the Swabian Jura, west of Ulm. Neighbori ...
, in the
Swabian Jura The Swabian Jura ( , more rarely ), sometimes also named Swabian Alps in English, is a mountain range in Baden-Württemberg, Germany, extending from southwest to northeast and in width. It is named after the region of Swabia. It is part of th ...
. It flows east through
Blaustein Blaustein () is a town in the district of Alb-Donau (district), Alb-Donau Baden-Württemberg in Germany. It is situated on the Blau (Danube), Blau River, 6 km west of Ulm and has about 15,000 inhabitants. Before 1968, Blaustein was known ...
to the city of
Ulm Ulm () is the sixth-largest city of the southwestern German state of Baden-Württemberg, and with around 129,000 inhabitants, it is Germany's 60th-largest city. Ulm is located on the eastern edges of the Swabian Jura mountain range, on the up ...
, where it empties into the
Danube The Danube ( ; see also #Names and etymology, other names) is the List of rivers of Europe#Longest rivers, second-longest river in Europe, after the Volga in Russia. It flows through Central and Southeastern Europe, from the Black Forest sou ...
.


Blau valley

The valley of the Blau was formed by the Danube. When the Swabian Jura rose, the Danube initially incised a deeper and deeper valley but finally chose a course to the southwest. In the valley it left behind today, the
Schmiech Schmiech is a small river in the Swabian Alb, Baden-Württemberg, Germany. Its source is a karst spring. It flows into the Danube in Ehingen. See also *List of rivers of Baden-Württemberg A list of rivers of Baden-Württemberg, Germany: A * ...
river flows south meeting the Danube in
Ehingen (Donau) Ehingen (Donau) (; ) is a town in the Alb-Donau district in Baden-Württemberg, Germany, situated on the left bank of the Danube, approx. southwest of Ulm and southeast of Stuttgart. The city, like the entire district of Ehingen, belonged t ...
, whereas the Blau flows east towards
Ulm Ulm () is the sixth-largest city of the southwestern German state of Baden-Württemberg, and with around 129,000 inhabitants, it is Germany's 60th-largest city. Ulm is located on the eastern edges of the Swabian Jura mountain range, on the up ...
.


References


Further reading


Stadt Blaustein
(in German)
Geschichte der Stadt Blaubeuren
(in German)
Wohnen auf Zeit in Ulm und Umgebug
(in German) Rivers of Baden-Württemberg Rivers of Germany {{BadenWürttemberg-river-stub