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Bregenzer Ache

River in Austria
The Bregenzer Ach is the main river of the Bregenz Forest, in the Austrian state of Vorarlberg. It is a tributary to Lake Constance, which is drained by the Rhine. The river is 67 kilometers long and drains almost the entire area of the Bregenz... Wikipedia
Basin size: 832 km2 (321 sq mi)