Baïse

The Baïse or Grande Baïse () is a French river that flows through the Hautes-Pyrénées, Gers and Lot-et-Garonne departments, in the Occitanie and Nouvelle-Aquitaine regions.

The river's source is in the Pyrenees and is a left tributary of the Garonne river. In general, it flows from south to north.

Geography
The Baïse river has a length of  and a drainage basin with an area of .

Its average yearly discharge is  at Nérac, a small town of the Lot-et-Garonne department that is at about  of the confluence with the Garonne river. The largest discharges are during winter and spring, with  in February.

Average monthly discharge (m3/s) at Nérac

Course
The source of the Baïse is on the Plateau de Lannemezan, in the Capvern commune (Hautes-Pyrénées), at an altitude of about .

The Baïse flows through 2 regions, 3 departments and 52 communes. Some of the communes are:
 Occitanie region
 Hautes-Pyrénées : Lannemezan, Trie-sur-Baïse
 Gers : Mirande, Castéra-Verduzan, Valence-sur-Baïse, Condom
 Nouvelle-Aquitaine region
 Lot-et-Garonne : Moncrabeau, Nérac, Lavardac, Buzet-sur-Baïse

Finally, it flows into the Garonne river at Saint-Léger (Lot-et-Garonne), at  of altitude.

Main tributaries 
 Left tributaries
 Gélise - 
 Right tributaries
 Baïsole - 
 Petite Baïse - 
 Auloue - 

Gallery

Related pages
 List of rivers of France

 References 

Other websites

 Banque Hydro - MEDDE, «Synthèse de la Banque Hydro - (O6692910)»  
 Histoire & Patrimoine des Rivières & Canaux - Rivière Baïse 
 River Baïse: Cruising in Detail

Category:Rivers of Occitanie
Category:Rivers of Nouvelle-Aquitaine