Ider River

Ider: View west from about the northeast end of 1940 originating Iderbrücke near Dschargalant

Bridge ( 1940 ) at Dschargalant; Looking west south west

Position of Ider in the catchment area of the Selenga (left)

The Ider (Mongolian Идэр гол or Идэрийн гол / Ideriin gol ) is 57 m³ / s, the bigger and with 452 km also the longer of the two source rivers of the Selenga River in Mongolia (Asia ) and thus hydrologically the main branch of the Yenisei River system. The generally eastward flowing Ider unites with the last southeastward flowing second source river Delgermörön to Selenge.

Course

The Ider arises in the east of Dsawchan Aimag in the Khangai Mountains about 50 km northeast of its highest mountain, the Otgon Tenger Uul. It sets out its name from the combination of two source streams to around 2330 m altitude.

Initially, the Ider Tarwagatain Mountains flows in the nature reserve in the foothills of the Khangai Mountains to the northwest, then in a northerly direction. Then it flows mainly by east-northeast and then turns to her last kilometers at the confluence of its main tributary Chuluut north.

Finally, the Ider height united in the southern part of the Chöwsgöl aimag with the coming of the North Delgermörön who has previously recorded, about 1.5 km upstream, coming from the west Bugsein Gol, at 1176 m from the Selenga, the opening out of the southwest main inflow of Lake Baikal.

Hydrology, ice and navigability

The catchment area of ​​Ider is about 24,600 km ². The river is covered every year from November to April from ice. If melt ice and snow in the spring and summer, caused by the river often floods. The middle and lower reaches of the Ider are navigable.

Flora and Fauna

The Ider flows largely through steppe areas. In the river life of the family Salmonidae, for example, grayling, trout and taimen.

Bridges

About 3 km north-west of the city on Ider inflow Chundschuliin Gol county town Dschargalant the Ider is crossed by a wooden bridge built in 1940, next to the since 2011 is a new bridge made ​​of reinforced concrete in construction. Another concrete bridge over the Ider is located in Galt.