Orne (river)

For the river Orne in Lorraine, see Orne (Moselle).
Orne

The Orne in Caen
Native name L'Orne (f)
Basin
Main source Aunou-sur-Orne
Source elevation 240 m (790 ft)
River mouth English Channel
49°16′42″N 0°13′34″W / 49.27833°N 0.22611°W / 49.27833; -0.22611 (English Channel-Orne)Coordinates: 49°16′42″N 0°13′34″W / 49.27833°N 0.22611°W / 49.27833; -0.22611 (English Channel-Orne)
Basin area 2,932 km2 (1,132 sq mi)
Countries France
Length 170 km (110 mi)
Avg. discharge 27.5 m3/s (970 cu ft/s)

The Orne (Ptolemeus Olina) is a river in Normandy, within northwestern France.[1] It discharges into the English Channel at the port of Ouistreham. Its source is in Aunou-sur-Orne, east of Sées. Its main tributaries are the Odon and the Rouvre.

The Orne flows through the following departments and towns:

Name

The name of the Orne in Normandy, which is referred to as the Olina by Ptolemy, is a homonym of Fluvius Olne, the Orne saosnoise in Sarthe, which Xavier Delamarre traces back to the Celtic olīnā (elbow).

Hydrology and water quality

The waters of the Orne are typically moderately turbid and brown in colour. pH levels of the Orne have been measured at 8.5[2] at the town of St. Andre sur Orne where summer water temperatures approximate 18 degrees Celsius. Electrical conductivity of the Orne has been measured at 30 micro-Siemens per centimeter.

See also

Notes

Wikimedia Commons has media related to Orne River.
  1. ↑ Atlas des Routes de France, Solar Press: Donnees IGN (2007)
  2. ↑ Hogan, C Michael, Water quality of freshwater bodies in France, Lumina Press, Aberdeen 2006
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