Environmental monitoring of Lake Baikal

Contamination of bottom sediments of Lake Baikal

The map presents data characterizing the pollution of bottom sediments at Roshydromet landfills on Lake Baikal - in the area of ​​influence of municipal wastewaters of the city of Baikalsk, in the shallow water of the river. Selenga and in the influence zone of the BAM route.
On the map in the area of ​​the polygons there are pictograms in the form of the upper and lower halves of a circle. The color of the upper half of the circle corresponds to the degree of pollution of bottom sediments by benzo (a) pyrene (BP), the lower one - by the amount of polycyclic aromatic hydrocarbons (PAHs).
There are 4 categories of pollution degree - background, slightly polluted, moderately polluted and heavily polluted for PAHs and 3 categories for BP (background, moderately polluted and highly polluted).
When you hover the cursor over the icon, a window will appear with quantitative characteristics of the contamination of bottom sediments.


The graph shows the values ​​of the area of ​​the pollution zone of bottom sediments for 2012 - 2020, calculated by the total indicator, as the excess of the average contents of the standard ingredients for the control of bottom sediments and water in a two-centimeter layer of bottom sediments.


At present, the greatest danger to the ecosystem of Lake Baikal is posed by carcinogenic PAH-BPs, which accumulate in the bottom sediments of the lake. BP was recorded in bottom sediments in all surveyed polygons. The strongest PAH contamination was noted in the sandy deposits of the landfill in the area of the WWTP discharge in the city of Baikalsk.



Source of information:
1. Review of the state and pollution of the environment in the Russian Federation for 2020
2. GHI materials for 2020