The Ostrach () is a long right tributary stream of the Danube in Baden-Württemberg, Germany.
Geography
The Ostrach originates on the north side of the European watershed, in the vicinity of Fleischwangen in the district of Ravensburg and drains out of the . It runs parallel to the Ablach for most of its length, flowing between two moraine hills by Ostrach, through the Weithart, and the Göge-Ablach plateau. The mouth of the Ostrach lies in Hundersingen, a suburb of the community of Herbertingen in the district of Sigmaringen where it runs for to the Danube. The catchment area is .
Localities on the Ostrach Die Ostrach traverses or touches several districts and communities from its source to the Danube: The locale of Fleischwangen, where it originates, Guggenhausen, Riedhausen, Ostrach and its subdivisions of Laubbach, Jettkofen, Wangen, Einhart and Habsthal, the Mengen city subdivision of Rosna, the Hohentengen subdivisions of Bremen and Beizkofen, and finally by Hundersingen, where it reaches the Danube.
Tributaries Tributaries of the Ostrach include the Wilhelmsdorf canal, the Fleischwanger Ach (creek), the Hornbach, the Tiefenbach and the Seebach.
Ecology
Since 2005, a beaver population has developed in the Pfrunger-Burgweiler wetlandsAccording to Pia Wilhelm, staff member of the Naturschutzzentrum des Schwäbischen Heimatbundes Pfrunger-Burgweiler Ried – since October 2008 verifiable. In the upper range of the Ostrach, the beavers have erected a dam across the stream, creating a pond that holds 1000 cubic meters of water, causing the tributaries of the Ostrach to overflow their banks, to the great frustration of the farmers in Riedhausen and Laubbach.Josef Unger: Wasserstau im Pfrunger-Burgweiler Ried bei Arbeitseinsatz beseitigt. Biberdamm nun etwas niedriger. In: Südkurier of 21. November 2008
A seven million Euro protection project was planned with the goal to protect the wetlands and the watershed.Florian Unger: Natur. Staudamm quer durch die Ostrach. Im Pfrunger-Burgweiler Ried sind Biber am Werk – Sorge um Stauung und überflutete Wiesen. In: Südkurier of 11. November 2008 The project has been finished in 2015.
References
See also List of rivers of Baden-Württemberg