Caspian Sea: State of the Environment 2019

Table 4.2: Total chemical run-off from the Volga and Terek rivers into the Caspian Sea, 2011–2015

2011

2012

2013

2014

2015

Average

River run-off, km 3

198

238

265

220

189

222

Organicmatters, thousand tonnes

3519

4316

4749

4082

4015

4136

Ammoniumnitrate, thousand tonnes

11,9

6,5

30,6

2,2

3,1

10,9

Nitrite, thousand tonnes

5,6

3,8

14,3

0,54

2,0

5,2

Nitrates, thousand tonnes

46,4

76,4

72,5

48,8

36,2

56,1

Mineral nitrogen, thousand tonnes

63,9

86,7

117,6

51,5

41,3

72.2

Mineral phosphorous, thousand tonnes

4.0

7.5

7.6

5.1

2.0

5.2

Phosphorous, total, thousand tonnes

11.4

22.4

22.7

14.9

5.7

15.4

Silicon, thousand tonnes

1029

2470

962

1048

769

1256

Ferrum, thousand tonnes

52.1

75.0

71.3

32.3

30.3

52.2

Cuprum, tonnes

864

1133

1020

842

796

931

Zink, tonnes

3086

2777

3239

5611

3468

3636

Nickel (Ni), tonnes

2090

3380

1430

2540

1580

2204

Lead (Pb), tonnes

231

395

658

1060

371

543

Manganese (Mn), tonnes

973

1280

2060

697

283

1059

Chromium (Cr), tonnes

71.8

148

136

90

82.8

106

Molybdenum, tonnes

33.1

36.3

119

-

90.8

69.8

Cobalt (Co), tonnes

11.3

23.0

11.3

33.5

37.5

23.3

Cadmium (Cd), tonnes

9.6

0.43

-

-

19

9.7

Hydrargyrum (Hg), tonnes

2.3

0.23

3.6

3.3

-

2.4

Aluminium, tonnes

-

-

64.0

82.6

-

73.3

Phenols, thousand tonnes

0.32

0.41

0.48

0.35

0.34

0.38

Total PetroleumHydrocarbons, thousand tonnes

15.7

22.1

15.8

7.1

24.4

16.8

DDT, tonnes

0.24

0.30

0.26

0.23

0.33

0.27

Dichlorodiphenylethylene (DDE), tonnes

0.36

0.56

0.51

0.30

0.51

0.45

Alfa-hexachlorocyclohexane, tonnes

0.28

0.32

0.44

0.38

0.29

0.34

Gamma-hexachlorocyclohexane, tonnes

0.23

0.14

0.18

0.23

0.35

0.23

Source: Monakhov 2014a; Monakhov 2014b; Monakhov 2015.

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