Rivière du Sud-Ouest (Saint Lawrence River tributary)


The Rivière du Sud-Ouest is a tributary of the southeast coast of the St. Lawrence River. This river flows in the administrative region of Bas-Saint-Laurent, in Quebec, in Canada, in the regional county municipalities of:
The Southwest river rises in the outlet of Lake Saint-Mathieu, at Saint-Mathieu-de-Rioux. It then follows the St. Lawrence River in a northeast-southwest direction to flow into the Havre du Bic. During its course, it crosses Petit Lac Saint-Mathieu and Lac de la Station. Its two main tributaries are the outlet of Grand Lac Malobès and the Neigette River. A fall from a height of is located near its mouth.
The flow of the south-west river is generally slow, its course being located on a plateau whose average altitude is. The last eight kilometers show more rugged terrain.
From the mouth of Lake Saint-Mathieu, the southwest river flows over divided into the following segments:
Upper course of the river
Upper course of the river
The watershed has an area of.

Toponymy

The toponym "south-west river" was formalized on December 5, 1968 at the Commission de toponymie du Québec.

Fauna

The river hosts a small population of Atlantic salmon of around 40 spawners. The latter goes up the river on where the fall of constitutes an insurmountable obstacle. Salmon spend the first two years of their lives in the river. The second species in abundance is generally the American eel, which unlike salmon, goes up the river over its entire length to Lake Saint-Mathieu.

Appendices

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