Ouanne (river)

The Ouanne is a 83.5 km long river in France. It is a left tributary of the Loing.

Geography

The Ouanne rises in the Forêt de Frétoy, in the commune of Saint-Sauveur-en-Puisaye, Yonne department. It flows generally northwards.

Course

The Ouanne flows through the following departments and towns:

• Yonne: Saint-Sauveur-en-Puisaye, Ouanne, Toucy
• Loiret: Charny-Orée-de-Puisaye, Douchy-Montcorbon, Château-Renard

It joins the Loing at Conflans-sur-Loing.

Hydrology

The Ouanne river basin is part of the Seine River basin. Its drainage area is 593 km2.

Tributaries

The Ouanne has several tributaries, including:

• Branlin (left)
• Vrin (left)
• Aveyron (right)