Semnon
The Semnon between Pléchâtel et Poligné.
Semnon is located in France
Semnon
Semnon is located in Brittany
Semnon
Location
CountryFrance
Physical characteristics
Source 
  locationCongrier
  coordinates47°47′30″N 01°08′34″W / 47.79167°N 1.14278°W / 47.79167; -1.14278
  elevation90 m (300 ft)
Mouth 
  location
Vilaine
  coordinates
47°53′59″N 01°45′25″W / 47.89972°N 1.75694°W / 47.89972; -1.75694
  elevation
7 m (23 ft)
Length73.3 km (45.5 mi)
Basin size400 km2 (150 sq mi)
Discharge 
  average2.8 m3/s (99 cu ft/s)
Basin features
ProgressionVilaineAtlantic Ocean

The Semnon (French pronunciation: [sɛmnɔ̃]; Breton: Sevnon) is a 73.3 km (45.5 mi) long river in the Mayenne, Maine-et-Loire, Ille-et-Vilaine and Loire-Atlantique départements, northwestern France.[1] Its source is at Congrier. It flows generally west-northwest. It is a left tributary of the Vilaine into which it flows between Pléchâtel and Bourg-des-Comptes.

Départements and communes along its course

This list is ordered from source to mouth:

References

  1. Sandre. "Fiche cours d'eau - Semnon (J76-0300)".


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