Lake Sevan Has Negative Balance

Lake Sevan Has Negative Balance


As of 3 December, the level of Lake Sevan is lower by 4 cm as compared with the same day last year. The lake level is 1900.41 meters instead of last year's 1900.45 meters. This year the lake level reached its highest peak on 21 June making up 1900.85 m. Because of additional water intake and evaporation, the level of Lake Sevan has decreased by 44 cm so far. If to convert this figure to the water amount taking into consideration the expert estimate that 1 cm is equal to 13 million cum water, it will turn out that 572 million cum water decreased in the lake in 2018.

It should be mentioned that in 2017 Lake Sevan also recorded a negative balance as a result of additional water intake of 100 million cum water and evaporation lowering from its highest peak of 1900.91 meters up to 1900.42 m.

Reminder: according to Article 5.1 of RA Law 'On Approving Annual and Complex Programs for Recovery, Conservation, Reproduction and Use of Lake Sevan Ecosystem’, annually 165 million cum water should flow into Lake Sevan due to Vorotan-Arpa hydrosection, and up to 300 million cum water due to Arpa-Sevan tunnel. As a result, Lake Sevan should annually have increased by 21.6 cm.

Vorotan-Arpa hydrosection has been constructed though, so far it hasn’t operated. Since 2010 rehabilitation works have been carried out in Arpa-Sevan tunnel and the tunnel only worked several days allowing water to flow into Lake Sevan. The rehabilitation of Arpa-Sevan tunnel is planned to be accomplished in April 2019 and the tunnel will operate with the full capacity. According to the official sources, the tunnel will allow flowing additional 270 million cum water into Lake Sevan.

December 03, 2018 at 17:51