The Aïgue Longue is a left tributary of the Luy de Béarn

Luy de Béarn

- Geography :The source of the Luy de Béarn is at the base of the plateau of Ger, east of Pau. It flows north-west through the Chalosse region and joins the Luy de France to form the Luy below the castle of Gaujacq.- Départements and towns :...

, at Mazerolles

Mazerolles, Pyrénées-Atlantiques

Mazerolles is a commune in the Pyrénées-Atlantiques department in south-western France. The locally-famous pastry pastis d'Amélie is produced here, at the Larquier bakery.-See also:*Communes of the Pyrénées-Atlantiques department*-References:*...

, Pyrénées-Atlantiques

Pyrénées-Atlantiques

Pyrénées-Atlantiques is a department in the southwest of France which takes its name from the Pyrenees mountains and the Atlantic Ocean.- History :...

, in the Southwest of France

France

The French Republic , The French Republic , The French Republic , (commonly known as France , is a unitary semi-presidential republic in Western Europe with several overseas territories and islands located on other continents and in the Indian, Pacific, and Atlantic oceans. Metropolitan France...

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Geography

The Aïgue Longue rises in the moor of Pont-Long in the north of Pau. It flows through the lake of Uzein

Uzein

Uzein is a commune in the Pyrénées-Atlantiques department in south-western France.-References:*...

 and joins the Luy de Béarn (77 km) upstream from Mazerolles, Pyrénées-Atlantiques, in a parallel motion with the Uzan

Uzan River

The Uzan, is a left tributary of the Luy de Béarn, in Uzan, Pyrénées-Atlantiques, in the Southwest of France.It rises in the moor of Pont-Long in the north of Pau. It flows into the Luy de Béarn downstream from the Aïgue Longue.-References:...

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A dam near Mazerolles forms a reservoir

Reservoir

A reservoir , artificial lake or dam is used to store water.Reservoirs may be created in river valleys by the construction of a dam or may be built by excavation in the ground or by conventional construction techniques such as brickwork or cast concrete.The term reservoir may also be used to...

named Lac de L'Aigue Longue.