Table 1. Physico-chemical characteristics of Ethiopian highland lakes
| Parameter | Lake |
| Dendi | Wonchi | Ziqualla | Hyqe | Ardibo | Tana |
| Secchi (m) | 12 | 5 | 1 | 2.75 | 3.28 | 0.87 |
| Zeu (m) | 33 | 14 | 1.7 | 4.95 | 9.87 | 2.61 |
| Conductivity (µS/cm) | 120 | 201 | 78 | 909.95 | 704.86 | 148.5 |
| Salinity (‰) | 0.1 | 0.1 | 0.24 | NA | 0.3 | 0.075 |
| Alkalinity (meq/L) | 1.5 | 2.32 | 1.5 | 9.88 | 2.14 | 2.98 |
| pH | 8.27 | 8.1 | 7.91 | 9.06 | 9.4 | 7.9 |
| NO2-N (µg/L) | 1.0 | 0.3 | 2.4 | 6.49 | NA | 150 |
| NO3-N (µg/L) | 18 | 1 | 15 | 41.6 | 36.53 | 763 |
| NO4-N (µg/L) | 90 | 79 | 48 | NA | NA | 200 |
| NH4-N (µg/L) | 90 | 79 | 48 | 257.17 | 83.9 | 800 |
| SRP (µg/L) | 2.9 | 3.4 | 15.7 | 21.81 | 23.84 | 326 |
| TP (µg/L) | 6.7 | 8.4 | 21.6 | 58.1 | 69.15 | 862 |
| Chlorophyll-a (µg/L) | 0.1 | 3.2 | 2.2 | 21.3 | 3.28 | 38 |
| Na+ (mg/L) | 7.8 | 42.5 | 12.7 | 61.2 | 85.1 | NA |
| K+ (mg/L) | 3.4 | 6.8 | 2 | 4.2 | 8.2 | NA |
| Mg2+ (mg/L) | 5.1 | 1.4 | 4.22 | 97.8 | 38.5 | NA |
| Ca2+ (mg/L) | 14.7 | 8.4 | 17.43 | 1.02 | 11.5 | NA |
| F– (mg/L) | 0.3 | 2.7 | 0.4 | 1 | 0.5 | NA |
| Cl– (mg/L) | 3.2 | 3.3 | 3.4 | 35.8 | 14.2 | NA |
| SO42– (mg/L) | 0.9 | 1.09 | 0.15 | 2.8 | 2 | NA |
SRP, Soluble Reactive Phosphorus; TP, total phosphorus.