South Nation River
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South Nation River Rivière Nation |
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 South Nation River at Plantagenet |
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| Data | ||
| location | Ontario (Canada) | |
| River system | Saint Lawrence River | |
| Drain over | Ottawa River → Saint Lawrence River → Atlantic Ocean | |
| source | near Fairfield East 44 ° 40 ′ 30 " N , 75 ° 42 ′ 0" W. |
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| muzzle | in the Ottawa River , 2 km east of Wendover Coordinates: 45 ° 34 ′ 29 " N , 75 ° 6 ′ 5" W 45 ° 34 ′ 29 " N , 75 ° 6 ′ 5" W
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| length | 161 km | |
| Catchment area | 3830 km² | |
| Drain |
MQ |
35 m³ / s |
 South Nation River at Chesterville |
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The South Nation River ( French Rivière Nation ) is a right tributary of the Ottawa River in eastern Ontario in Canada .
It has its origins in the forests and swamps north of Brockville . From there it flows 161 km in a northeasterly direction to the Ottawa River , into which it flows north of Plantagenet . Its catchment area covers 3830 km².
The river is called the "South Nation River" to distinguish it from the river of almost the same name in Québec , which flows into the Ottawa River from the north and is called the "Petite-Nation River" or Rivière de la Petite Nation . The names of both rivers are derived from the French name of the Indian tribe originally living here, the Weskarini .
The area around the river was originally covered with Weymouth pine forests. Today it is mainly used by agriculture .
The river drains an almost flat area. Due to the lack of a slope, the waters tend to flood. Dams and flood protection measures were therefore set up to reduce the damage caused by seasonal floods in the river's catchment area.
Notable tributaries are (in downstream order):
- North Branch South Nation River
- Sandy Creek
- Payne River
- several arms of the Castor River
- Moose Creek
- Bear Brook
- Scotch River
- Caledonia Creek
Municipalities on the river are (in downstream order):
