The Aidar ( uk, Айдар, russian: Айдар) is a river in

Luhansk Oblast Luhansk Oblast ( uk, Луга́нська о́бласть, translit=Luhanska oblast; russian: Луганская область, translit=Luganskaya oblast; also referred to as Luhanshchyna, uk, Луга́нщина) is the easternmost oblast ...

Ukraine Ukraine ( uk, Україна, Ukraïna, ) is a country in Eastern Europe. It is the second-largest European country after Russia, which it borders to the east and northeast. Ukraine covers approximately . Prior to the ongoing Russian inv ...

and

Belgorod Oblast Belgorod Oblast (russian: Белгоро́дская о́бласть, ''Belgorodskaya oblast'') is a federal subject of Russia (an oblast). Its administrative center is the city of Belgorod. Population: History At the turn of the 17th cent ...

Russia Russia (, , ), or the Russian Federation, is a List of transcontinental countries, transcontinental country spanning Eastern Europe and North Asia, Northern Asia. It is the List of countries and dependencies by area, largest country in the ...

. A left tributary of the

Seversky Donets The Seversky Donets () or Siverskyi Donets (), usually simply called the Donets, is a river on the south of the East European Plain. It originates in the Central Russian Upland, north of Belgorod, flows south-east through Ukraine (Kharkiv, Don ...

, it is long (with located within Ukraine) and has a basin area of .«Река Айдар (Адар, Айдор)»
Russian State Water Registry The slopes of the valley are partitioned with

ravine A ravine is a landform that is narrower than a canyon and is often the product of streambank erosion.gorge A canyon (from ; archaic British English spelling: ''cañon''), or gorge, is a deep cleft between escarpments or cliffs resulting from weathering and the erosion, erosive activity of a river over geologic time scales. Rivers have a natural tenden ...

s. In the spring, snow melt accounts for approximately 70% of the flow. The average flow module is 1.7 litres • sec / km². The river freezes in December.

References

* М. Т. Янко. Топонімічний словник-довідник української РСР, К., «Радянська школа», 1973, стор. 13 {{Russia-river-stub Rivers of Belgorod Oblast Rivers of Luhansk Oblast