Lake Kezenoy-am (Lake Goluboye, Russian: Кезенойам, Голубое; Chechen: Къоьзана Iaм, romanized: Q̇özana Jam) is the deepest lake in the Caucasus Mountains, in the Russian Federation, mostly in Chechnya but partly in Dagestan. It goes through Andiyskiy Khrebet (Andian Ridge). It is situated at an altitude of 1,870 m (6,140 ft) above sea level and covers an area of 2.4 km (0.93 sq mi). The maximum depth of the lake is 74 m (243 ft). In winter the surface of the lake freezes and in summer the water temperature is around 5 °C (41 °F). The lake water has a year-round supply of oxygen in which plankton survive. Salmo ezenami, a rare species of trout, are native only to the lake; however, their population is threatened with extinction due to the introduction of European chubs (Squalius cephalus) which consume their fry.
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Lake Kezenoyam in the context of Chechnya
Chechnya, officially the Chechen Republic, is a republic of Russia. It is situated in the North Caucasus of Eastern Europe, between the Caspian Sea and Black Sea. The republic forms a part of the North Caucasian Federal District, and shares land borders with Georgia to its south; with the Russian republics of Dagestan, Ingushetia, and North Ossetia–Alania to its east, north, and west; and with Stavropol Krai to its northwest.
After the dissolution of the Soviet Union in 1991, the Checheno-Ingush ASSR split into two parts: the Republic of Ingushetia and the Chechen Republic. The latter proclaimed the Chechen Republic of Ichkeria, which declared independence, while the former sided with Russia. Following the First Chechen War of 1994–1996 with Russia, Chechnya gained de facto independence as the Chechen Republic of Ichkeria, although de jure it remained a part of Russia. Russian federal control was restored in the Second Chechen War of 1999–2009, with Chechen politics being dominated by the former Ichkerian mufti Akhmad Kadyrov, and later his son Ramzan Kadyrov.