Parameter | Units | 20 July | 27 July | 3 August | 10 August | 17 August | 24 August | 1 September | 9 September |
---|---|---|---|---|---|---|---|---|---|
Water temperature | °C | 27 | 27 | 27 | 27 | 27 | 26 | 25 | 24 |
Air temperature | 30 | 28 | 30 | 27 | 22 | 24 | 24 | 27 | |
Transparency | m | 3.5 | 3.1 | 3 | 3 | 2.75 | 3.1 | 2.75 | 2.6 |
Turbidity | NTU | 1.09 | 0.98 | 1.08 | 1.35 | 3.17 | 0.96 | 1.14 | 0.96 |
pH | 8.03 | 7.29 | 7.49 | 7.75 | 7.44 | 7.76 | 8.15 | 8.03 | |
Dissolved oxygen | mg l−1 | 8.03 | 7.29 | 7.49 | 7.75 | 7.44 | 7.76 | 8.15 | 8.03 |
Conductivity | μS cm−1 | 229 | 222 | 225 | 218 | 214 | 222 | 222 | 224 |
Silicon dioxide | mg l−1 | 0.68 | 0.09 | 0.39 | 0.42 | 0.70 | 0.58 | 0.62 | 0.59 |
Ammonia | 0.06 | 0.05 | < 0.05 | < 0.05 | < 0.05 | 0.05 | 0.07 | <0.05 | |
Nitrates | 0.0036 | 0.0013 | 0.0039 | 0.0007 | 0.0010 | 0.0033 | 0.0020 | 0.0033 | |
Nitrites | 0.2657 | 0.0022 | 0.0022 | 0.2920 | 0.0198 | 0.0132 | 0.0022 | 0.0022 | |
Orthophosphates | 0.0015 | 0.0432 | 0.0432 | 0.003 | 0.0013 | 0.1652 | 0.0392 | 0.015 | |
Total phosphorus | 0.0111 | 0.0624 | 0.0591 | 0.0090 | 0.0105 | 0.1975 | 0.0714 | 0.0349 | |
Biological oxygen demand | mg O2 l−1 | 4.00 | 2.10 | 2.70 | 1.80 | 3.20 | 6.10 | 3.10 | 2.00 |