| Orne | |
|---|---|
The Orne in Caen |
|
| Origin | Aunou-sur-Orne |
| Mouth | English Channel |
| Basin countries | France |
| Length | 170 km (110 mi) |
| Source elevation | 240 m (790 ft) |
| Avg. discharge | 27.5 m3/s (970 cu ft/s) at mouth |
| Basin area | 2,932 km2 (1,132 sq mi) |
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. The Odon is one of its tributaries.
The Orne flows through the following departments and towns:
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.