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International Journal of Marine Science 2014, Vol.4, No.12: 108-118
http://ijms.sophiapublisher.com
112
Table 5 Turkish Environmental Regulation (2004), Quality Criteria of Inland Water Sources according to be Classes
Table 6 Turkish Environmental Regulation (2004), Quality
Criteria of Recreational Coasts and Marine Water
further purification. The levels of biological oxygen
demand in the wastewater of Sinop coast of the Black
sea ranged from 0.033-4.86 mg/L. The BOD increase
correlated with increase of population in the city
which increased the quantity of biodegradable matter
from the domestic waste in summer. Unpolluted
natural water should have a BOD of 4 mg/L or less;
however, the BOD in the water of Sinop coast
exceeded (only station 5) the standard limit set by
Turkish Environmental Regulations (2004).
Conductivity was in range of 25.7-29.6 mSiemens/cm,
while TSS ranged from 11-820 mg/L, above the
standard maximum of 30 mg/L set by the Turkish
Environmental Regulation (2004), for General Quality
Criteria of Marine Water for TSS (Table 6).
The mean pH levels of the water of Sinop coast in
2006-2007 ranged from 6.43-9.49, the values slightly
above the standards maximum 9 set by the Turkish
Environmental Regulation (2004), for General Quality
Criteria of Marine Water for pH levels (Table 6).
Nowadays the Black Sea is face with environmental
pollution. In the Black Sea coast of Turkey, some
cities use the sewerage system directly but most of the
small settlement areas used septic tanks. On the other
hand, present sewerage systems show also variety
such as combined or separate system. Ordu, Giresun
city centres have separate sewerage systems where
Sinop, Trabzon and Zonguldak have combined
systems but only Samsun city centre have both
combined and separate sewerage system (Bakan
et al
.,
1996). Many industrial untreated industrial and
agricultural wastes drain into the sea (Bat
et al
., 2009).
Domestic discharge is the greatest source of organic
matter discharged into coasts. Bat
et al
. (2009) pointed
out that many towns and cities situated on the coast,
however, sewage is discharged untreated in the Black
Sea coast of Turkey. Organic matter is an important
pollutant, as it is a source of food for many benthic
invertebrates in the marine ecosystem (Bat
et al
.,
2007).
In conclusion the results of the present study indicated
that in terms of sediment and water pollution of Sinop
coasts of the Black Sea is not dangerous for marine
Water Quality Classes
I
II
III
IV
1) Temperature (
℃
)
25
25
30
> 30
2) pH
6.5-8.5
6.5-8.5
6.0-9.0
Above 6.0-9.0
3) Dissolved oxygen
(mg O
2
.L
-1
)
8
6
3
< 3
4) Saturated of Oxygen
(%)
90
70
40
< 40
5) Nitrite nitrogen
(mg NO
2
⎯-N.L
-1
)
0.002
0.01
0.05
> 0.05
Physico-chemical
parameters
6) Nitrate nitrogen (mg
NO
3
⎯-N.L
-1
))
5
10
20
> 20
Organic parame
ter
Biological Oxygen
Demand (BOD)
4
8
20
> 20
Turkish Environmental Regulation (2004), Quality Criteria
of Recreational Coasts and Marine Water
Parameter
Standard
Observation
pH
6-9
-
Dissolved oxygen Above 80% of
oxygen saturation
-
Turkish Environmental Regulation (2004), General Quality
Criteria of Marine Water
Parameter
Criteria
Observation
pH
6.0-9.0
-
TSS (mg L
-1
)
30
-
Dissolved
oxygen (mg L
-1
)
Above 80% of
oxygen saturation
Observed the dissolved
oxygen values along the
depth
Pulled to pieces
organic pollutants
-
It must be the optimum
level for reduce the
dangerous level of the
oxygen