Aa is a river of

North Rhine-Westphalia North Rhine-Westphalia or North-Rhine/Westphalia, commonly shortened to NRW, is a States of Germany, state () in Old states of Germany, Western Germany. With more than 18 million inhabitants, it is the List of German states by population, most ...

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 ...

. It is long and is a left tributary of the

Möhne The Möhne () is a river in North Rhine-Westphalia, Germany. It is a right tributary of the Ruhr. The Möhne passes the towns of Brilon, Rüthen Rüthen () is a town in the district of Soest, in North Rhine-Westphalia, Germany. Geography Rü ...

Brilon Brilon (; ) is a town in North Rhine-Westphalia, Germany, which belongs to the Hochsauerlandkreis. Geography Brilon is on the Brilon Heights, at an altitude of about 450m, and the upper reaches of the river Möhne. The town lies between the Ar ...

. The river has a watershed of . The source of Aa is in the village of Altenbüren. From here it flows in an easterly direction. At above sea level its course meanders to the north. Nearby the Hillbringse flows in from the south. Half a kilometer farther are five former mills in Aatal, called Aamühlen. The

Fülsenbecke Fülsenbecke is a small river of North Rhine-Westphalia, Germany. It flows into the Aa near Brilon. See also *List of rivers of North Rhine-Westphalia A list of rivers of North Rhine-Westphalia, Germany: A B C * Calenberger Bach * Casum ...

flows in near here from the north. The Aa overcomes an elevation difference of , which corresponds to an average bed slope of 9.7 percent.

References

Rivers of North Rhine-Westphalia Rivers of Germany {{NorthRhineWestphalia-river-stub