Caspian Sea State of the Environment 2019
Data from the monitoring carried out by Ro- shydromet as part of a special extended pro- gramme at more than 100 stations were used to assess pollution and seawater quality in the northern and north-western part of the Caspian
ately polluted”. In the Karazhanbas area, and along the Kenderli–Divichi, Peschanniy–Derbent and Mangyshlak–Chechen cross sections, seawater quality was assessed as “clean” (Monakhov 2014a; Monakhov 2014b; Monakhov 2015).
Table 5.8: Main chemical composition and marine pollution indicators in areas close to oilfields
Concentration in 2017
Background concentration
Indicator
Horizon
Contemporary **
Historical *
Filanovsky Field
Korchagin Field
7.33…11.84 7.28…11.96 1.43…3.84 1.26…3.85 7.98…8.44 7.99…8.45 12.2…86.2 10.6…84.4 359…714 369…769 1.07…2.70 1.12…2.80 18.5…39.9 19.6…39.7 376…1060 397…1025 0.04…0.13 0.01…0.13 0.018…0.094 0.018…0.095
7.5…11.9 7.4…12.0 1.02…2.17 1.08…2.08 8.23…8.42 8.20…8.40 0.6…39.1 0.5…41.8 263…583 244…557 1.50…7.50 1.80…8.70 16.0…31.1 13.6…37.2 255…656 304…763 0…0.12 0.03…0.12 0…0.018 0…0.024 6.09…12.6 5.36…13.1 1.47…6.08 1.81…6.75 1.62…4.95 1.86…4.61 0.042…0.090 0.037…0.086
Surface Bottom Surface Bottom Surface Bottom Surface Bottom Surface Bottom Surface Bottom Surface Bottom Surface Bottom Surface Bottom Surface Bottom Surface Bottom Surface Bottom Surface Bottom Surface Bottom
4.30…9.90 3.10…9.90 0.40…3.80 0.50…4.70 7.58…8.67 7.34…8.66
6.70…12.0 2.40…12.1 0.70…3.90 0.40…3.90 8.03…8.67 7.75…8.69
Oxygen, mg/dm 3
BOD5, mg/dm 3
рН, pH unit
0…438 0…72
0…201 0…174
Ammonia nitrogen, μg/dm 3
148…1355 224…1333
254…1759 244…1538
Total nitrogen, μg/dm 3
0…73.0 0…15.0
0.60…28 0.60…26 0…110 8.20...85
Mineral phosphorus, μg/dm 3
15.0…210 18.0…400 10.0…1617 23.0…2500 0…0.43 0…0.37 0…0.056 0…0.041 0…0.69 0…0.51 0…19.0 0…27.0 0…8.80 0…6.60 0.10…11.0 0…14.0
Total phosphorus, μg/dm 3
96.0…4736 15.0…3544
Dissolved silicon, μg/dm 3
0…0.22 0…0.61 0…0.173 0...0.270
Oil products, mg/dm 3
Surfactants, mg/dm 3
0...0.0023 0...0.0022 7.49…16.4 7.47…18.4 1.52…4.98 2.93…6.75 1.67…4.33 1.81…4.92
– –
Total PAH, μg/dm 3
1.70…113 2.30...95.0 3.90…94.0 3.40…90.0 0.30…65.0 0.30…25.0
Zinc, μg/dm 3
Nickel, μg/dm 3
Copper, μg/dm 3
65
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