River and Lake Water Quality
Content
Lake Water Quality

Amount of chlorophyll and nutrients in the water reservoirs Veľká Domaša and
    Zemplínska Šírava during vegetative period 1996
Phytoplankton Production in the Waterwork Gabčíkovo
 

Water quality in the selected water reservoirs and lakes- average values on July - August, 1996
 
Name
Surface area 
(in km2)
Minimum Transparency

(in m)
Nanorg.
(N-NO3+N-NO2+N-NH4)
(in mg per 1)
P-PO4
(in m g. per 1)
Chlorophyll ”a”
(in mg per m3)
Saprobity index 
ŠJ Kisa-Ňarád
0.01
-
0.11
 ND
-
1.93
ŠJ KRA Dunajská Streda
0.01
-
0.65
 ND
 1.18
2.08
VN Šahy
0.02
-
0.89
 220
-
-
BJ Klinger
0.02
-
1.00
          7
-
-
VN Veľké Kozmálovce
0.03
-
3.54
350
-
-
ŠJ Veľký Meder - Okoč
0.04
-
0.11
 ND
-
1.85
BJ Dolné Hodrušské
0.05
-
1.04
         70
-
-
VN Jelenec
0.07
0.50
1.15
         20
-
1.98
ŠJ Ivánka pri Dunaji
0.07
-
3.17
< 15
 0.74
1.66
ŠJ Veľký Cetín
0.08
0.70
2.29
         80
-
1.92
BJ Veľké Richňavské
0.08
-
1.83
 ND
-
-
BJ Veľké Kolpašské
  0.09
-
0.38
          8
-
-
BJ Počúvadlo 
  0.12
-
0.32
          1
-
-
ŠJ Šaštín Stráže
  0.12
0.5
0.19
        96          44.4
1.68
ŠJ Plavecký Štvrtok
  0.12
-
 0.35
< 15
         10.88
1.80
VN Koliňany
  0.13
  0.25
 2.03
120
-
2.00
VN Duchonka
  0.14
-
 5.01
-
-
2.00
ŠJ Most pri Dunaji
  0.16
-
               11.84
< 15
          2.86
1.79
VN Nemečky
  0.18
-
 2.19
-
-
-
ŠJ Šurany-Tona
  0.18
-
 0.41
 ND
-
-
ŠJ Jakubov
  0.20
-
1.07
< 15
         39.07
1.98
VN Kurinec - Zelená voda
  0.25
 0.4
                2.4        60
-
1.96
VN Bátovce - Lipovina 
  0.26
-
1.36
150
-
-
VN Tomky
  0.29
 0.4
0.64
< 15
         54.46         2.0
ŠJ Komjatice
  0.33
-
                0.4
 ND
-
-
VN Zemplínska Šírava     33.00
-
0.59
 ND
         26.97 1)
1.95
VN Slepčany
  0.46
 0.3
2.27
 120
-
         2.0
VN Vráble
  0.48
 0.3
2.29
         80
-
1.95
ŠJ Rovinky
  0.56
-
2.15
< 15
           0.75
1.54
VN Kunov
  0.63
 0.5
3.15
< 15
           3.46
1.94
VN Teplý Vrch
  0.70
 0.9
2.68
 140
-
1.89
VN Palcmanská Maša
  0.86
 3.76
-
-
-
-
ŠJ Zelená voda       1.10
-
1.43
         10
-
1.15
ŠJ Slnečné jazerá Senec       1.16
 3.4
6.63
< 15
           1.87
1.69
VN Ružiná       1.70
 1.2
0.23
         16
-
-
VN Veľká Domaša       9.50
 0.6
1.03
           7        12.7 2)         1.8
VN Kráľová n/Váhom     10.44
 0.4
1.48
         50        27.23
1.92
VN Liptovská Mara     21.68
-
1.59
         40
-
1.65
VN Oravská priehrada     35.00
 1.4
3.17
         20
-
1.50
Abbreviations:                                                                                                                                                                    Source: ŠZÚ SR
VN - water reservoir
ŠJ - gravel lake
BJ - mine lake
ND - undetectable by used method
1) maximal value in 1996 measured on August
2) maximal value in 1996 measured on April 1996

In the Slovak Republic the water with concentration of chlorophyll “a” bigger than the value of 25 mg per m3 is assessed as very eutrophic water. In the table presented it is in the case of water reservoirs Kráľová nad Váhom, Zemplínska Šírava, Tomky, gravel lakes Jakubov and Šaštín - Stráže.