Aarhus River

On the left side of the Åboulevarden (August 2007), amounting to St. Clemens Torv

Aarhus Å or older Århus Å ( German Aarhus Bach ) is a 32 to 40 kilometer long, regulated Danish watercourse south of Lake Stilling Solbjerg springs Sø in the bog Astrup Moses east of Skanderborg and in the port of Aarhus to the Århusbucht in the southwestern Kattegat opens. In approximately 320 km ² catchment area the Aarhus Å form together with its tributaries has a total length of 230 kilometers.

The longest tributary is the 25 km long Lyngbygårds Å, which flows from north to west of Aarhus lake located Årslev Engso. Of the carrying Lakes Årslev Engso and Brabrand Sø belong to the EU protection areas referred to the Fauna-Flora -Habitat Directive.

The mouth of the Aarhus Å gave the city its name Aarhus. The oldest documented name for Aarhus, Aros is composed of Aa (German Bach, in the genitive Ar) and -us or -os, which means mouth. First cultivations of the city originated in the 10th century on the north side of the mouth behind a semi-circular wall. The developing at the port of Aarhus Auenmündung expanded in the 19th and 20th centuries in the Århusbucht and is now the second largest port and the largest container port in Denmark.

The lower course through the center of Aarhus to the port was tunneled in the 1930s of hygiene and traffic reasons. As part of an urban renewal of the area of Christian Bro was exposed to just before the harbor in the years 1989 to 2009 and again created on the left bank with the Åboulevarden an attractive street with cafes and restaurants.