The Oh?e near Budyn? nad Oh?í
|• location||Fichtel Mountains, Bavaria, Germany|
|Elbe, Czech Republic|
|Length||316 km (196 mi) |
|Basin size||5,588 km2 (2,158 sq mi) |
|• average||38 m3/s (1,300 cu ft/s)|
|Progression||Elbe-> North Sea|
The Oh?e (pronounced ['o?r]) or, slightly less commonly in English sources, the Eger (German: Eger, Czech also: Oharka or Ohara, Celtic: Agara, Polish: Ohrza), is a 316 km river in Germany (50 km) and the Czech Republic (266 km), left tributary of the Elbe. The river's catchment area is 5,588 km2, of which 4,601 km2 is in the Czech Republic, 920 km2 in Bavaria and 67 km2 in Saxony. It is the fourth-longest river in the Czech Republic.
Several districts in Germany and the Czech Republic have formed a Euroregion initiative, Euregio Egrensis, to foster co-operation in the region.
There is a Czech pun that the Oh?e got its name from the river Teplá (meaning "warm" in Czech)--"oh?át" means "to warm up". However, the real origin, which also shows in the German name, is Celtic, from Agara (the "Salmon River"). The records show the name as Agara, Agira, Agra in the 9th century, Egire, Egra or Ogra in the 11th century and Eger in 1472. Another theory states that since in North Macedonia there exists a Lake Ohrid, the Slavic people who settled in the Balkans, particularly the region of Macedonia around Lake Ohrid, originated from the area of the river Oh?e and thus named the lake in Macedonia "Ohrid".
The river then flows through Lake Weissenstadt and the towns of Roeslau, Marktleuthen and Hohenberg where it leaves Germany. After about 35 km, the Eger (not to be confused with the town in Hungary), as the river is called in German, crosses the border into the Czech Republic to flow through parts of Bohemia which were known until 1945 as Egerland. The river passes the towns of Cheb, (German: Eger, like the river), Karlovy Vary, Klá?terec nad Oh?í, Kada?, ?atec, Louny, and Terezín before flowing into the river Elbe at Litomice. The river basin of the Oh?e is part of formerly German speaking Sudetenland still having many toponyms from German.
The highest volume flow rate occurs in spring. The average volume flow rate at the mouth is 37.94 m³/s. The lower part of the river flows through areas with the lowest average precipitation in the Czech Republic (less than 500 mm).
The Oh?e is primarily used for irrigation and hydroelectric energy. There are two dams: Skalka (built in 1962-1964, area 378 ha) and Nechranice (built 1961-1968, area 1338 ha). The river flows through the following important towns: Cheb, Sokolov, Loket, Karlovy Vary, Ostrov nad Oh?í, Klá?terec nad Oh?í, Kada?, ?atec, Louny, Libochovice, Budyn? nad Oh?í, Terezín and Litomice.