Geoscience Reference
In-Depth Information
09 mg L
1
in the upper layer, and O
ðu; k;
z
;
t
Þ
¼
conditions occur: O
ðu; k;
z
;
t
Þ
¼0
:
05 mg L
1
in the remaining water depth. Under other suppositions, the structure
of the distribution O
ðu; k;
z
;
t
Þ
is does not change. Only while the pollution scales
change.
The creation of the monitoring system for the oil and gas extraction zone situated
in the South-China Sea foresees the distinguishing of oil pollution sources. That is
why Adaptive Identi
0
:
er was used to estimate the oil pollution of the main rivers of
South Vietnam (Saigon and Dong Nai). Apart from this, the task of distinguishing
between oil and salt spills on the water surface of reservoirs, where industrial
biological production is realized, was solved. Moreover, the control of water quality
in the Dongnai river is important for the ecological service of HoChiMinh City.
Table
4.14
and Fig.
4.31
represent some experimental data. It is obvious that the
Saigon river is characterized by unstable formations of oil clots moving randomly
by depth. The predictability of the Saigon river pollution level equals 60
70 %
-
Table 4.14 Results of model-based calculations of pollution levels of the Saigon river based on
the measurements by Adaptive Identi
er
Water quality factors
x
NO
3
(mg L
−
1
)
P
2
O
5
(mg L
−
1
)
TDS
(mg L
-
1
)
TSS
(mg L
−
1
)
BOD
5
(mgO
2
L
−
1
)
Oil
(mkg L
-
1
)
0
0.80
0.10
50.1
15.5
2.2
0.40
1
0.81
0.12
50.1
15.5
2.4
0.40
2
0.83
0.15
49.9
15.4
2.5
0.41
3
0.92
0.21
50.1
15.5
2.8
0.42
4
0.96
0.24
52.3
15.9
2.9
0.44
5
1.11
0.35
54.2
16.7
3.3
0.45
6
1.26
0.42
60.9
17.2
4.0
0.46
7
1.35
0.44
65.8
19.8
5.1
0.47
8
2.09
0.91
70.3
25.1
6.2
0.53
9
3.41
1.23
77.7
30.2
6.8
0.56
10
4.18
2.42
80.1
37.3
7.7
0.58
11
6.01
3.09
90.4
41.8
8.3
0.60
12
6.12
3.17
91.3
42.7
8.4
0.61
13
5.99
3.18
91.2
41.9
8.3
0.63
14
6.03
3.21
91.1
41.8
8.5
0.65
15M
6.07
3.19
91.1
41.9
8.6
0.65
15E
6.8
7.32
4.01
130.5
58.3
0.92
17.08 20.45 30.19 28.13 30.08 29.34
The river velocity is equal to 3 km h
−
1
. Measurements are realized during 15 November 1994 from
10:00 to 15:00. Notation x is the distance from HoChiNinh river port along the Saigon river
downstream (km),
ʔ
is the model error (%), TDS (Total Dissolved Solids), TSS (Total Suspended
Solids), BOD (Biological Oxygen Demands), the symbols M and E correspond to the model and
experiment, respectively
ʔ
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