On August 7-8, water quality monitoring was once again carried out in Lake Sevan.
Observations were carried out in both surface and bottom layers of the lake.
According to preliminary results.
The concentration of dissolved oxygen in the surface and middle layers of the lake is greater than 6 mg/l, which is sufficient for the preservation of fauna (6.6-7.6 mg/l in Little Sevan, 6.7-7.5 mg/l in Big Sevan).
A decrease in the content of dissolved oxygen is observed in the Big Sevan, mainly at 20m, and in the Little Sevan, starting from the depths of 55m, decreasing to 1.9-5.5mg/l in the bottom layers (3.6mg/l at a depth of 80 meters).
The transparency in Little Sevan is 1.9m, in Great Sevan - 2.1m (according to the Sec disk).
Phosphate ion content.
SURFACE LAYERS. Big and Little Sevan: 0.09 mg/l.
SPECIAL LAYERS. Big Sevan: 0.055 mg/l, Little Sevan: 0.210 mg/l.
Compared to the previous month, a decrease in phosphate ion content was observed in all layers of the Great Sevan, as well as in the surface layers of the Little Sevan.
Compared to the previous month, an increase in phosphate ion content was observed in the depths of 30-80m of Little Sevan due to the decomposition of biomass.