3 Causes and Effects of Water Pollution in Romania
81
0
10000
20000
30000
40000
chemical pollution
nutrient pollution
organic pollution
saline or other intrusion
altered habitats due to
hydrological changes
altered habitats due to
morphological changes
acidification
other
unknown
none
Impact type (km)
0
2000
4000
6000
8000
10000
0
1000
2000
3000
4000
5000
RO1
RO2
RO3
RO4
RO5
RO6
RO7
RO8
RO9
RP10
RO11
BA
JI
OL
AV
BI
DL
MU
CR
ST
SI
PB
No impact on water bodies length (km)
Impact type on water bodies length (km)
chemical pollution
nutrient pollution
organic pollution
saline or other intrusion
altered habitats due to hydrological changes
altered habitats due to morphological changes
acidification
other
unknown
none
(a)
(b)
Fig. 3.18 Significant impacts on surface water bodies (a) at national level, (b) on national
subdistricts
Higher content of nitrite and ammonium ions indicates the presence of reducing
conditions in the groundwater in spring, than in other seasons [1, 14, 43, 97, 98, 127,
132]. Nitrate ions dominate the other species, but also four samples situated close to
the garbage dumps, have a large content of ammonium ions.
3.3.1.1 Organic Pollutants
When an excess of organic matter, such as manure or sewage, comes into contact
with different types of water, an organic pollution occurs. In the case of a vapor by
organic matter input, the number of decomposition products increases, the decomposition yield being directly proportional to the amount of oxygen required, reaching
in some situations the depletion of dissolved oxygen and implicitly the damage to
aquatic organisms. As they die, they are broken down by aerobic degradation mech-