Variable | Urban | Rural | df | t-value | P | |
---|---|---|---|---|---|---|
1 | Water temperature (°C) | 25.5 (25.1–26.0) | 22.7 (22.3–23.0) | 69 | -10.36 | < 0.00001 |
2 | pH | 7.42 (7.18–7.66) | 7.72 (7.50–7.94) | 69 | 1.87 | 0.033 |
3 | Total dissolved solids, TDS (mg/l) | 100.2 (85.6–114.9) | 58.7 (37.9–79.4) | 69 | -5.14 | < 0.00001 |
4 | Electrical conductivity, EC (μS/cm) | 152.6 (128.2–176.9) | 91.3 (58.2–124.4) | 69 | -4.31 | < 0.00001 |
5 | Ammonia, NH4 (mg/l) | 0.30 (0.26–0.33) | 0.24 (0.20–0.28) | 69 | -1.71 | 0.046 |
6 | Phosphate, PH4 (mg/l) | 0.13 (0.10–0.17) | 0.16 (0.11–0.22) | 69 | 0.96 | 0.339a |
7 | Nitrate, NO3 (mg/l) | 0.42 (0.37–0.47) | 0.22 (0.16–0.29) | 69 | -5.49 | < 0.00001 |
8 | Dissolved oxygen, DO (mg/l) | 6.25 (5.97–6.53) | 5.85 (5.42–6.29 | 69 | -1.56 | 0.124a |
9 | Total suspended solids, TSS (mg/l) | 8.03 (4.80–11.25) | 45.86 (11.66–82.05) | 69 | 4.40 | < 0.00001 |
10 | Number of bacteria (log10 bacteria /ml) | 5.00 (4.81–5.23) | 5.06 (4.53–5.58) | 33 | 0.25 | 0.804a |
11 | Altitude (masl) | 697.3 (689.5–705.1) | 1037.9 (1022.0–1053.8) | 68 | 39.80 | < 0.00001 |