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Table 2
Physical and chemical parameters and Trophic State Index (TSI) values classification for chlorophyll a (TSI – Chl a), for each sampling period of each pond. *BDL – Below Detection Limit; O – Oligotrophic; M – Mesotrophic; E – Eutrophic. Pond 2 was dry during August and September sampling period.
| Pond | Month | Cond, µS/cm | O2, % | TDS, mg/L | TSS, mg/L | Turb, m | CDOc, m–1 | NO2–, μg/L | Hardness, mg/l CaCO3 | Chl a, μ g/L | TSI, Chl a | BOD5 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Jun | 6.2 | 58.5 | 6 | 0.003 | 1.380 | 13.340 | 0.059 | 3 | 3.26 | 42.20 − M | 0.572 | |
| Jul | 7 | 50.0 | 7 | 0.004 | 4.140 | 0.000 | 0.099 | 3 | 2.97 | 41.27 − M | 0.696 | ||
| Aug | 8.8 | 89.0 | 9 | 0.004 | 1.840 | 5.290 | 0.065 | 5 | 3.20 | 42.02 − M | 0.464 | ||
| Sep | 12.5 | 104.6 | 12 | 0.003 | 0.000 | 0.690 | 0.093 | 3 | 5.01 | 46.40 − M | 0.652 | ||
| Oct | 7 | 96.0 | 8 | 0.013 | 1.840 | 11.730 | 0.021 | 3 | 2.67 | 31.25 − O | 0.542 | ||
| Nov | 5.1 | 77.8 | 5 | 0.004 | 2.070 | 8.510 | 0.170 | 4 | 6.13 | 47.56 − M | 0.378 | ||
| 2 | Jun | 12.7 | 58.0 | 13 | 0.002 | 1.380 | 4.140 | 0.060 | 3 | 2.27 | 38.64 − O | 0.332 | |
| Jul | 14.6 | 65.6 | 15 | 0.004 | 1.840 | 7.360 | 0.075 | 3 | 6.43 | 48.86 − M | 0.526 | ||
| Aug | – | – | – | – | – | – | – | – | – | – | – | ||
| Sep | – | – | – | – | – | – | – | – | – | – | – | ||
| Oct | 0.1 | 92.9 | 0.1 | 0.023 | 2.530 | 18.860 | 0.025 | 3 | 3.20 | 13.67 − O | 0.667 | ||
| Nov | 6.5 | 65.5 | 6 | 0.000 | 1.610 | 12.420 | 0.041 | 3 | 1.96 | 37.19 − O | 0.018 | ||
| 3 | Jun | 5.1 | 52.8 | 5 | 0.001 | 0.920 | 13.110 | 0.109 | 3 | 4.27 | 44.84 − M | 0.314 | |
| Jul | 5.3 | 39.1 | 5 | 0.004 | 0.920 | 0.000 | 0.125 | 3 | 2.67 | 36.26 − O | 0.440 | ||
| Aug | 5.5 | 94.8 | 5 | 0.008 | 2.070 | 2.070 | 0.077 | 4 | 4.45 | 45.25 − M | 0.160 | ||
| Sep | 7.4 | 98.0 | 7 | 0.003 | 0.000 | 0.000 | 0.101 | 6 | 2.14 | 38.05 − O | 0.582 | ||
| Oct | 5.5 | 97.2 | 6 | 0.007 | 0.920 | 4.600 | 0.138 | 3 | 0.57 | 38.05 − O | 0.946 | ||
| Nov | 4.9 | 75.0 | 90 | 0.001 | 0.690 | 4.830 | *BDL | 3 | 2.27 | 38.64 − O | 0.170 | ||
| 4 | Jun | 8.1 | 49.0 | 8 | 0.005 | 0.690 | 8.970 | 0.066 | 5 | 2.94 | 41.17 − M | 0.228 | |
| Jul | 11.1 | 67.0 | 11 | 0.005 | 2.530 | 11.270 | 0.080 | 4 | 2.37 | 39.08 − O | 0.850 | ||
| Aug | 14.2 | 98.2 | 14 | 0.007 | 5.290 | 14.950 | 0.057 | 4 | 7.18 | 49.93 − M | 1.430 | ||
| Sep | 21.1 | 85.0 | 21 | 0.013 | 2.300 | 14.260 | 0.065 | 6 | 9.19 | 52.36 − E | 0.692 | ||
| Oct | 5.6 | 99.0 | 6 | 0.000 | 2.070 | 54.280 | 0.538 | 3 | 3.20 | 10.85 − O | 0.905 | ||
| Nov | 5 | 70.8 | 5 | 0.010 | 1.380 | 8.740 | 0.047 | 4 | 1.60 | 35.22 − O | 0.964 | ||
| 5 | Jun | 138.6 | 77.9 | 139 | 0.004 | 3.450 | 18.860 | 0.054 | 8 | 2.67 | 40.23 − M | 0.538 | |
| Jul | 129.7 | 50.0 | 130 | 0.071 | 2.070 | 1.150 | 0.246 | 6 | 4.54 | 45.44 − M | 0.462 | ||
| Aug | 89.7 | 87.6 | 90 | 0.001 | 0.460 | 4.140 | 0.087 | 3 | 1.34 | 35.22 − O | 0.506 | ||
| Sep | 93.3 | 67.0 | 97 | 0.005 | 0.690 | 0.000 | 0.047 | 7 | 5.65 | 47.03 − M | 0.09 | ||
| Oct | 48.9 | 91.8 | 49 | 0.001 | 3.450 | 17.480 | 0.050 | 4 | 1.57 | 26.63 − O | 0.755 | ||
| Nov | 89.5 | 92.5 | 90 | 0.006 | 2.760 | 3.680 | 0.574 | 7 | 4.35 | 45.03 − M | 0.964 | ||
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