Research Article
Assessing the Industrial Effluent Effect on Irrigation Water Quality and Farm Soil near Kombolcha Town, Ethiopia
Table 4
Mean values of irrigation water characteristics compared with the degree of restriction.
| | Parameter | Unit | FAO degree of restriction (FAO Soil Bulletin 55, 1985) | Upstream Borkena | Downstream Borkena | | None | Slightly restricted | Severe |
| | EC | dS/m | <0.7 | 0.7–3 | >3 | 0.48 | 0.96 | | Na+ | mg/l | <3 | 3–9 | >9 | 1.46 | 3.35 | | Cl− | mg/l | <4 | 4–10 | >10 | 5.07 | 7.67 | | Mg+2 | mg/l | Normal range: 0–5.0 | 2.18 | 5.27 | | Ca+ | mg/l | Normal range: 0–20 | 10.00 | 16.61 | | pH | — | Normal range: 6.5–8.0 | 8.38 | 8.54 | | CO3−2 | mg/l | Normal range: 0–0.2 | 0.16 | 1.25 | | HCO3− | mg/l | <1.5 | 1.5–8.5 | >8.5 | 4.76 | 9.10 | | Fe | mg/l | Normal range: 0–5.0 | 0.05 | 4.25 | | Cu | mg/l | Normal range: 0–0.2 | 0.06 | 0.21 | | Mn | mg/l | Normal range: 0–0.2 | 0.009 | 0.18 | | Pb | mg/l | Normal range: 0–5.0 | 0.28 | 0.47 | | Cr | mg/l | Normal range: 0–0.1 | 0.0045 | 0.31 | | Cd | mg/l | Normal range: 0–0.01 | 0.0089 | 0.03 | | Ni | mg/l | Normal range: 0–0.2 | 0.0034 | 0.0076 | | TDS | mg/l | <450 | 450–2,000 | >2,000 | 305.07 | 612.98 |
|
|
Ca+: calcium; Cd: cadmium; Cl−: chloride; CO3−2: carbonate; Cr: chromium; Cu: copper;EC: electrical conductivity; Fe: iron; HCO3−: bicarbonate; Mg+2: magnesium; Mn: manganese; Na+: sodium; Ni: nickel; Pb: lead; SAR: specific absorption rate; TDS: total dissolved solids.
|
