4 Management of Surfaces Water Resources—Ecological Status …
149
Table 4.3 Statistical situation regarding the number of accidental pollution cases in the Romanian
aquatic environment (period 2000–2011)
Year Number of accidental pollution cases in the period 2000–2011
Animal industries Oil Slag and
suspensions
Chemical products Others Total
2000
0
34
0
3
44
81
2001
0
66
6
9
38
119
2002
0
74 10
13
20
117
2003
0
50
5
8
0
63
2004
1
13
2
7
4
27
2005
4
39
5
3
12
63
2006
7
36
3
5
3
54
2007 15
49
8
0
10
82
2008 13
49
0
8
13
83
2009 17
31
0
11
5
64
2010 10
34
0
12
4
60
2011 12
14
0
2
7
35
Total 79
489 39
81
160
848
Source A.N.A.R., quoted by Popescu D, Nistoran D
• Actively—oxygen intake in the mass of water—is achieved by air diffusion through
the air-water interface, but also by the photosynthesis process by which oxygen is
released in the mass of water;
• Passively—oxygen consumption—which occurs through natural pollution (e.g.
erosion), direct pollution by waste-water spillage and aerobic decomposition but,
in particular, anaerobic decomposition of organic debris from sediments. It is
known that in anaerobic processes there are microorganisms that do not require
the presence of dissolved oxygen, the final products of the processes are sulphides,
hydrogen sulphide, methane, etc.
4.4 Case Study—Water Quality in the Mure¸ s
Hydrographic Basin, Mure¸ s Waterbody Confluence
Petrilaca—Confluence Arie¸ s,—Reflected
in an Overview of Physico-Chemical and Biological
Indicators
We consider it necessary to mention that the study aims to present the values of some
indicators characterizing the quality of the Mure¸ s waterbody confluence Petrilaca—
confluence Arie¸ s, for the period 2015–2017. We will present and discuss the minimal,
149
Table 4.3 Statistical situation regarding the number of accidental pollution cases in the Romanian
aquatic environment (period 2000–2011)
Year Number of accidental pollution cases in the period 2000–2011
Animal industries Oil Slag and
suspensions
Chemical products Others Total
2000
0
34
0
3
44
81
2001
0
66
6
9
38
119
2002
0
74 10
13
20
117
2003
0
50
5
8
0
63
2004
1
13
2
7
4
27
2005
4
39
5
3
12
63
2006
7
36
3
5
3
54
2007 15
49
8
0
10
82
2008 13
49
0
8
13
83
2009 17
31
0
11
5
64
2010 10
34
0
12
4
60
2011 12
14
0
2
7
35
Total 79
489 39
81
160
848
Source A.N.A.R., quoted by Popescu D, Nistoran D
• Actively—oxygen intake in the mass of water—is achieved by air diffusion through
the air-water interface, but also by the photosynthesis process by which oxygen is
released in the mass of water;
• Passively—oxygen consumption—which occurs through natural pollution (e.g.
erosion), direct pollution by waste-water spillage and aerobic decomposition but,
in particular, anaerobic decomposition of organic debris from sediments. It is
known that in anaerobic processes there are microorganisms that do not require
the presence of dissolved oxygen, the final products of the processes are sulphides,
hydrogen sulphide, methane, etc.
4.4 Case Study—Water Quality in the Mure¸ s
Hydrographic Basin, Mure¸ s Waterbody Confluence
Petrilaca—Confluence Arie¸ s,—Reflected
in an Overview of Physico-Chemical and Biological
Indicators
We consider it necessary to mention that the study aims to present the values of some
indicators characterizing the quality of the Mure¸ s waterbody confluence Petrilaca—
confluence Arie¸ s, for the period 2015–2017. We will present and discuss the minimal,