Gélise

The Gélise is a river of south-western France that flows through the Gers, Landes and Lot-et-Garonne departments, in the Occitanie and Nouvelle-Aquitaine regions. It is a left tributary of the Baïse river.

Geography
The Gélise has a length of , and a drainage basin with an area of approximately .

Its average yearly discharge (volume of water which passes through a section of the river per unit of time) is 4.72 cubic metres per second at Mézin.

Course
The Gélise starts in the place known as Cahuzères in the commune of Lupiac, Gers department, at an elevation of about . It flows to the northwest and then, after Castelnau-d'Auzan, turns to the northeast.

It joins the Baïse on its left bank at Lavardac, at about  of altitude.

The Gélise flows through 21 communes. It passes through the following regions, departments and communes:

 Occitanie region
 Gers: Dému, Eauze, Labarrère, Ramouzens, Castillon-Debats, Castelnau-d'Auzan, Lupiac, Noulens
 Nouvelle-Aquitaine region
 Landes: Parleboscq, Escalans
 Lot-et-Garonne: Sos, Poudenas, Mézin, Barbaste, Sainte-Maure-de-Peyriac, Nérac, Lavardac, Andiran, Saint-Pé-Saint-Simon, Réaup-Lisse

Main tributaries 
The main tributaries of the Gélise river are:
 Left tributaries
 Rimbez - 16.4 km;
 Gueyze - 17.7 km;
 Right tributaries
 Izaute - 37.5 km;
 Auzoue - 74.1 km;
 Osse - 120.2 km;

Related pages
 List of rivers of France

 References 

Other websites

 Banque Hydro - Station O6793310 - La Gélise à Mezin  

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