Dangerous enterprises and their

affect on the Lake Baikal environmental

areaSirina Nataliya

Irkutsk State University

Objectives:

consider environmental situation in Shelekhov;

calculate pollutants dispersion near Shelekhov;

assess possible contribution of emission from Shelekhov enterprises to Lake Baikal surface pollution.

Equation of transfer and turbulent diffusion of admixture:

z

sk

zy

sk

yx

sk

x s -

z

s ) w-(w

y

s v

x

su

t

szyxg

Olha

Populated area

Smolenshina

Aluminium plant area

0 1кмDacha’s area

Shelekov city

1

2

Irkut river

Irkut river

Figure 1 – Frequency exceeding of benz(a)pyrene 5 maximum allowable concentrations (standards for air), January

Irkut

Olha

Irkut river

Populated area

0 1km

Dacha’s area

Shelekhov city

1Aluminium plant area

Smolenshina

Figure 2 – Frequency exceeding of solid fluoride maximum allowable concentrations (standards for air), January

Figure 3 – Isolines of matter concentrations near surface when north-west wind blows

1

А

The Baikal

LakeShelekhov

10 km

Figure 4 – Isolines of matter concentrations 100 meters height when north-west wind blows

10 km

1

Shelekhov

B

The Baikal

Lake

Table

Different substances near surface concentrations of Shelekhov enterprises

Substance Danger class

Concentrations limit (mg/м3) Concentration for isopleth's number 1 (mg/m3)Maximum

(20 min average)

Daily average

Nitrogen oxide (IV) 2 0,2 0,04 5·10-5

Sulphur oxide (IV) 3 0,5 0,05 2·10-4

Carbon oxide 4 5,0 3,0 5·10-4

Benz(a)piren 1 - 106 5·10-8

Fluoric hydrogen 2 0,02 0,005 1,5·10-5

Acetone 4 0,35 0,35 10-8

Suspended matters 3 0,5 0,15 6·10-4

Carbon-black 3 0,15 0,05 5·10-7

Conclusions: we pointed out that Shelekhov is one of the

most air polluted towns in Russia; we presented environmental assessment

results of pollutants dispersion near Shelekhov;

we evaluated possible contribution in pollution of Baikal surface from Shelekhov industrial enterprises and showed that polluting matters reach the south Baikal areas in amounts rather lower then limited