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South Nation River
From Wikipedia, the free encyclopedia
The South Nation River is a river whose watershed covers 3,900 km², a large part of eastern Ontario. The river's headwaters are located north of Brockville, Ontario and it flows 175 km northeast to empty into the Ottawa River near Plantagenet, Ontario. This river is called the "South Nation River" to distinguish it from a river in Quebec north of the Ottawa River called the Petite-Nation River or rivière Petite-Nation. The names of both rivers are derived from the French name for the native people of this area, the Weskarini.
The area surrounding the river, originally covered with white pine, is now mainly used for agriculture.
The river drains an almost flat plain, and hence its lack of gradient makes it prone to flooding. Dams and other water control measures have been introduced to help reduce the impact of seasonal flooding in the watershed. In some areas the river flows through Leda clays which can be very unstable.
On June 20, 1993, a major landslide occurred near the former site of the town of Lemieux, Ontario. Approximately 3 million m³ of mud and clay slid into the river valley, blocking the river's flow for three days.
Tributaries include the
- various branches of the Castor River
- Payne River
- Scotch River
- Bear Brook
Communities on the river include:
- Casselman, Ontario
- Crysler, Ontario
- Plantagenet, Ontario
- Spencerville, Ontario