Table 4 Descriptive statistics and coefficient of variation (CV) for physicochemical parameters and water discharge at the gauging station on the Stara river in the period 2003–2023.
Parameter | Unit | Mean | Min | Max | Std. Dev. | CV [%] |
|---|---|---|---|---|---|---|
Q | m3·s−1 | 0.15 | 0.0001 | 64.09 | 0.86 | 569.9 |
pH | – | 7.66 | 7.02 | 8.13 | 0.2 | 2.1 |
EC | µS·cm−1 | 479.2 | 129.2 | 800.0 | 103.9 | 21.7 |
TSS | mg·dm−3 | 152.9 | 0.2 | 4763.9 | 398.6 | 260.7 |
TDS | 364.2 | 64.3 | 724.4 | 93.4 | 25.7 | |
Ca2+ | 55.67 | 15.68 | 114.33 | 12.3 | 22.2 | |
Mg2+ | 14.02 | 3.30 | 25.97 | 3.9 | 28.0 | |
Na+ | 18.76 | 5.05 | 68.79 | 6.4 | 34.0 | |
K+ | 8.83 | 1.44 | 50.21 | 10.5 | 119.2 | |
NH4+ | 0.201 | 0.0004 | 3.559 | 0.4 | 193.2 | |
HCO3− | 186.36 | 30.55 | 425.80 | 55.9 | 30.0 | |
SO42− | 55.80 | 18.54 | 120.00 | 15.3 | 27.3 | |
Cl− | 22.99 | 7.06 | 82.54 | 7.4 | 32.2 | |
NO3− | 7.17 | 0.005 | 28.56 | 5.2 | 72.1 | |
NO2− | 0.062 | 0.005 | 1.14 | 0.1 | 199.5 | |
PO43− | 0.214 | 0.01 | 2.7 | 0.35 | 161.8 | |
TIN | 1.13 | 0.000 | 7.51 | 1.3 | 116.7 |
