Boutonne

The Boutonne is a river of western France that flows through the Deux-Sèvres and Charente-Maritime departments, in the Nouvelle-Aquitaine region. It is a right tributary of the Charente river.
Geography.
The Boutonne 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 at Saint-Séverin-sur-Boutonne in the Charente-Maritime department, at an altitude of .
Average monthly discharge (m3/s) at Saint-Séverin-sur-Boutonne (1969-2017)
Course.
The Boutonne starts in the southeast of the Deux-Sèvres department, in the "commune" of Chef-Boutonne (that is, "Head of the Boutonne"), at an elevation of about .
It flows to the west and, later, to the southwest through the Deux-Sèvres and Charente-Maritime departments before flowing, at almost right angle, into the Charente river in Cabariot at about of altitude.
The Boutonne flows through 1 region (Nouvelle-Aquitaine), 2 departments and 41 "communes"; they are, from source to mouth:
Seven "communes" have the name of the river in their names: Chef-Boutonne, Saint-Séverin-sur-Boutonne, Dampierre-sur-Boutonne, Tonnay-Boutonne, Blanzay-sur-Boutonne, Nuaillé-sur-Boutonne, Vernoux-sur-Boutonne.
Main tributaries.
The main tributaries of the Boutonne river are:
Left tributaries:
Right tributaries: