Lake Sevan in Central Armenia40.3N 45.3E
Lake Sevan is the largest lake in Armenia and one of the largest high-altitude lakes in the world. It is situated in the central part of the Republic of Armenia, inside the Gegharkunik Province, at the altitude of 1900m above sea level.
The total surface area of its basin is about 5000 km2, the lake itself is 940 km2, and the volume is 34.0 bln cubic meters. It is fed by 28 rivers and streams. Only 10% of the outgoing water is drained by the Hrazdan (Razdan) River, while the remaining 90% evaporates. Sevan is of volcanic origin and full of freshwater springs. Thus, in the middle of the lake, the water is pure and drinkable.
Before human intervention dramatically changed this ecosystem the lake was 95 metres deep, covered an area of 1,360 km² (5% of Armenia’s entire area), had a volume of 58 km³ and a perimeter of 260 km. The lake surface was at an altitude of 1,950 m above sea level.