Große Aa

This article is about the Lower Saxon Große Aa. For other rivers of the same name, see Große Aa (disambiguation).
Große Aa
The confluence of the Große Aa with the Ems
Location Lower Saxony, Germany
Reference no. DE: 34
Length 25 km
Beginning confluence of the Deeper Aa and Ahe east of Freren
52°28′45″N 7°34′00″E / 52.47917°N 7.5666667°E / 52.47917; 7.5666667Coordinates: 52°28′45″N 7°34′00″E / 52.47917°N 7.5666667°E / 52.47917; 7.5666667
Source height 33 m above sea level (NN) 
(Deeper Aa 53 m above NN, Ahe 82 m above NN)
Mouth south of Lingen
52°27′37″N 7°19′29″E / 52.46028°N 7.32472°E / 52.46028; 7.32472
Mouth height 22 m above sea level (NN)
Descent 11 m
Basin Ems
Progression Ems North Sea
Right tributaries Reitbach, Schinken Canal, Südbach
Left tributaries Schaler Aa, Bardelgraben, Moosbeeke, Giegel Aa, Linner Graben, Speller Aa
Villages Beesten, Lünne

The Große Aa is a 25 km long, right, eastern tributary of the River Ems in western Lower Saxony (Germany).

It begins in the collective municipality of Freren, near the quarter of Overwater, at the confluence of the Deeper Aa and Ahe rivers. From there is flows through Lünne westwards to Hesselte, where it is joined by the Speller Aa. From there on it runs parallel to the Dortmund-Ems Canal and discharges into the Ems 6 km south of Lingen, a few metres north of the mouth of the canal after the Gleesen locks.

See also: Aa River

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