Table 1.
Physical and chemical variables of the water samples at the different sampling sites (average ± SD; n = 12 per sample) (notes: means followed by different letters in the same row differ significantly in Dunn’s post hoc test at 95% confidence interval. Different letters (a–d) in the same line indicate significant statistical difference (p < .05, Dunn’s post-hoc)).
| Sampling sites | Temperature (°C) | Conductivity (mS/cm) | pH | Dissolved oxygen (mg/L) | TOC (mg/L) | NO3− (mg/L) | PO43− (µg/L) |
|---|---|---|---|---|---|---|---|
| Upstream Budapest (DNW) | 13.57 ± 0.46 a | 0.29 ± 0.01 a | 7.54 ± 0.17 a | 9.74 ± 0.51 a | 3.35 ± 1.52 a | 6.23 ± 0.9 ab | 105.83 ± 56.8 a |
| Downstream Budapest (DSW) | 13.06 ± 1.14 a | 0.30 ± 0.01 ab | 7.81 ± 0.20 ab | 10.02 ± 0.78 a | 2.67 ± 0.99 a | 6.24 ± 0.86 a | 110.83 ± 74.16 a |
| Soroksári-Danube (SW) | 13.32 ± 0.24 a | 0.37 ± 0.02 bd | 8.07 ± 0.13 bc | 9.69 ± 0.63 a | 2.88 ± 0.59 a | 7.17 ± 0.98 a | 53.69 ± 7.07 a |
| Nyéki- Danube (NW) | 17.35 ± 0.46 b | 0.37 ± 0.00 cd | 7.82 ± 0.07 ab | 7.46 ± 0.59 b | 8.52 ± 0.51 b | 2.15 ± 0.23 b | 45.09 ± 14.00 ab |
| Riha Lake (RW) | 17.63 ± 0.23 b | 0.64 ± 0.00 c | 8.27 ± 0.04 c | 7.94 ± 0.34 b | 19.12 ± 0.41 b | 4.96 ± 0.24 b | 5.44 ± 2.25 b |