The Ohà Âe (), also known in English and German as Eger (), is a river in Germany and the Czech Republic, a left tributary of the Elbe River. It flows through the Bavarian district of Upper Franconia in Germany, and through the Karlovy Vary and ÃÂstànad Labem regions in the Czech Republic. It is long, of which is in the Czech Republic, making it the fourth longest river in the country.
The name is of Celtic or pre-Celtic origin. In the 9th century, it appeared as Agara. According to one theory, its meaning was 'salmon river' (composed of the words ag, eg â 'salmon', and are, ara â 'flowing water'). Another theory suggests that the name was derived from agriàand meant a fast-moving, fast-flowing river. In the 12th century, Ohà Âe was written as Egre, Oegre and Ogre.
The Ohà Âe originates in the territory of Bad WeiÃÂenstadt in the Fichtel Mountains at an elevation of , below the Schneeberg mountain. It flows to LitomÃÂà Âice, where it enters the Elbe River at an elevation of .
The Ohà Âe flows through the Fichtel Mountains in an eastward direction, through Lake Weissenstadt (WeiÃÂenstädter See) and through the towns of Röslau and Marktleuthen, and, after almost 50 km, reaches the Czech-German border near Hohenberg an der Eger. It then flows through the historic region of the Czech Republic which was known until 1945 as Egerland. The river passes the towns of Cheb, (, like the river), Loket, Sokolov, Karlovy Vary, KlÃ¡à ¡terec nad Ohà ÂÃÂ, Kadaà Â, à ½atec, Louny, Libochovice, Budynànad Ohà Âàand TerezÃÂn before flowing into the river Elbe at LitomÃÂà Âice.
The river is long, of which is in the Czech Republic, making it the fourth longest river in the Czech Republic. The German part of the river (including the border section) is long.
The highest volume flow rate occurs in spring. The average volume flow rate at the mouth is 37.94 mó/s. The lower part of the river flows through areas with the lowest average precipitation in the Czech Republic (400âÂÂ500 mm).
The Ohà Âe's drainage basin has an area of . The area of the drainage basin in the Czech Republic is , in Bavaria is . The rest of the drainage basin is in Saxony.
The drainage basin is divided to further third-level basin areas:
The longest tributaries of the Ohà Âe are:
The Ohà Âe is primarily used for irrigation and hydroelectric energy. There are two reservoirs: Skalka (built in 1962âÂÂ1964, area ) and Nechranice (built 1961âÂÂ1968, area ).