Table 1. General characteristics of the three analysed reservoirs and annual average values of some physical and chemical parameters.
| Parametersa | La Gileppe | Ry de Rome | Féronval |
| Latitude (N) | 50° 35′ 16.73′′ | 50° 01′ 21.67′′ | 50° 12′ 59.14′′ |
| Longitude (E) | 5° 58′ 34.75′′ | 4° 32′ 13.55′′ | 4° 23′ 25.34′′ |
| Altitude (m) | 310 | 280 | 220 |
| Surface of basin (km2) | 54 | 10 | 10 |
| Volume (hm3) | 26.4 | 2.2 | 0.8 |
| Surface (ha) | 130 | 26 | 21 |
| Retention time (years) | 0.86 | 0.55 | 0.31 |
| Max depth (m) | 58 | 25 | 12 |
| Mean depth (m) | 20.3 | 8.5 | 3.8 |
| Zeu (m) | 3.60 | 9.89 | 3.49 |
| Zm (m) | 5.67 | 4.33 | 5.33 |
| Zm/Zeu | 1.53 | 0.49 | 1.78 |
| pH | 5.71 | 6.81 | 7.86 |
| Conductivity (μS cm−1 at 25°C) | 57 | 59 | 392 |
| DO (mg O2 L−1) | 9.34 | 8.64 | 8.97 |
| Turbidity (NTU) | 3.57 | 1.90 | 6.79 |
| TAC (meq L−1) | 0.50 | 0.87 | 13.14 |
| DIN (mg L−1) | 0.63 | 0.72 | 2.21 |
| SRP (mg L−1) | 0.003 | 0.003 | 0.005 |
| TP (mg L−1) | 7.33 | 5.00 | 55.67 |
| Si (mg L−1) | 2.08 | 2.14 | 1.52 |
| BOD5 (mg O2 L−1) | 1.0 | 1.4 | 1.4 |
| COD (mg O2 L−1) | 19.0 | 5.0 | 11.9 |
| DOC (mg C L−1) | 6.74 | 2.66 | 4.00 |
| TOC (mg C L−1) | 8.39 | 3.12 | 5.50 |
| Alkalinity (meq L−1)b | 0.2 | 0.21 | 2.64 |
| Chlorophyll a (μg L−1) | 0.5 | 2.62 | 13.44 |
Values correspond to the average of six depths sampled in each reservoir, each month between March and October 2010.
a
, Zeu: Depth of euphotic zone, Zm: Depth of mixing zone, Cond: conductivity, TAC: total alkalinity, DIN: dissolved inorganic nitrogen, SRP: soluble reactive phosphate, TP: total phosphorus, Si: dissolved silica, BOD5: biological oxygen demand, COD: chemical oxygen demand, DOC: dissolved organic carbon, TOC: total organic carbon; b, [44].