Table 2
Means annual of physic-chemical parameters in some Tunisian reservoirs stocked with mullet fingerlings.
| Hydrological basins | Aquatic life | Irrigation | Raw waters for consumption | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|
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| North East | Extreme North Ichkeul | Medjerda | Central west | ||||||||||||
|
|
|
|
|
||||||||||||
| L | BM | J | S | SSM | BMt | NB | SS | ||||||||
| References | a | b | c | d | c | e | c | f | c | g | h | i | CEC (1978) | FAO (1994) | INNORPI (2014) NT 09.13 |
| Cond μS/cm | 690 | 629 | 621 | 3250 | 1700 | 247 | 3734 | 3000 | 2500 | ||||||
| T (°C) | 19.7 | 20.3 | 22.4 | 20.08 | 22.5 | 20.54 | 22.4 | 20 | 22.6 | 16.9 | 21 | 23.97 | 22 | ||
| O2 (mg/ L) | 8.7 | 9.02 | 15.6 | 7.78 | 8.6 | 4.58 | 4.6 | 8.26 | 5–9 | ||||||
| pH | 8.49 | 8.5 | 8 | 7.9 | 7.49 | 7.9 | 8.07 | 7.5 | 8.12 | 8.1 | 8.1 | 6.5–9 | 6.5–8.4 | 5.5−9 | |
| Turb (NTU) | 11.1 | 19.3 | 3.56 | 12.7 | 4.22 | 74.5 | 6.14 | 10 | 5000 | ||||||
| NO3 − (mg/L) | 0.72 | 1.69 | 6.5 | 4.7 | 3.4 | 0.49 | 12.7 | 1.2 | 3 | 0.15 | 0.198 | 1.6 | 10 | 100 | |
| NO2 − (mg/L) | 0,07 | 0.08 | 0.01 | 0.01 | 0.007 | 0.01 | 0.23 | 0.01 | 0.039 | 0.046 | 0.05 | 0.01–0.03 | |||
| NH4 + (mg/L) | 0.58 | 0.3 | 0.05 | 0.074 | 0.05 | 0.025 | 0.05 | 0.18 | 0.1 | 0.03 | 0.059 | 0.03 | 0.04–1.0 | 5 | 4 |
| PO4 3 (mg/L) | 0.09 | 0.16 | 0.13 | 0.053 | 0.044 | 2 | |||||||||
| PT (mg/L) | 0.18 | 0.23 | 0.5 | 0.95 | 0.5 | 0.034 | 0.5 | 0.1 | 0.5 | 0.057 | 0.060 | 0.027 | 0.7 | ||
| SO4 2− (mg/L) | 108 | 134.7 | 79 | 135.78 | 574 | 500 | 39 | 1335.93 | 960 | 500 | |||||
| Na+ mg/L | 55 | 41.8 | 62 | 67.64 | 507 | 220 | 25.1 | 506.09 | 920 | 200 | |||||
| K+ (mg/L) | 4 | 2.63 | 4.6 | 1.73 | 14.6 | 7.2 | 2.7 | 15.56 | 2 | ||||||
| Ca2+ (mg/L) | 68 | 47.78 | 53 | 52.18 | 183 | 167 | 27 | 386.87 | 400 | 200 | |||||
| Mg2+ (mg/L) | 19 | 21.26 | 16 | 9.77 | 65 | 38 | 7.9 | 105.03 | 60.75 | 100 | |||||
| Cl− (mg/L) | 81 | 83.64 | 95 | 75.65 | 664 | 237 | 37 | 742.30 | 1062 | 500 | |||||
| F− (mg/L) | 0.4 | 0.3 | 0.08 | 0.9 | 0.3 | 1.2 | 1.5 | ||||||||
| Fe (mg/L) | 0.06 | 0.06 | 0.03 | 3 | |||||||||||
| Zn (mg/L) | 0.005 | 0.009 | 0.005 | 0.006 | 0.005 | 0.03 | 5 | ||||||||
| Cu (mg/L) | 0.005 | 0.006 | 0.005 | 0.0072 | 0.005 | 0.002 | 3 | ||||||||
| SAR | 1,52 | 1.26 | 1.91 | 2.24 | 8,19 | 3.99 | 1.09 | 5.88 | 15 | ||||||
L: Lebna; BM: Bir Mcherga; J: Joumine; S: Sejnene; SSM: Sidi Salem; BMt: Béni Mtir; NB: Nabhena; SS: Sidi Saâd.
a: El Herry, 2008; b: Fathalli, 2012; c: Ben Rejeb Jenhani et al., 2017; d: Limam, 2003; e: Zouabi Aloui and Gueddari, 2009; f: Ben Othmen, 2003; g: Sellami et al., 2010; h: Sellami et al., 2016; i: Bouden, 1995.
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