Research Article
Estimation of Groundwater Quality in Arid Region or Semiarid Region by Using Statistical Methods and Geographical Information System Technique
Table 7
Guidelines for interpreting the quality of irrigation water.
| | Water constraint | Normal irrigation water ranking | Range during | | PRM | POM |
| | Sodium absorption ratio (SAR) | 0-10 | 0.4-5.0 | 0.3-4.0 | | Magnesium (Mg2+) | 0-6 | 0.17-2.90 | 0.40-2.50 | | Bicarbonate (CO32-) | 0-12 | 3.5-35.0 | 3.7-27.2 | | Calcium (Ca2+) | 0-25 | 0.6-3.60 | 0.50-2.50 | | Sodium (Na+) | 0-45 | 0.35-4.10 | 0.35-3.75 | | Sulphate (SO42-) | 0-25 | 0.2-27.4 | 0.2-16.5 | | Electrical conductivity (EC) | <2100 | 370-3920 | 655-3600 | | Chloride (cl-) | 0-35 | 0.5-20.0 | 1.8-19.0 | | Acid/base (pH) | 6.2-8.7 | 7.2-8.4 | 7-7.75 | | Potassium (K+) | 0-0.050 | 0.15-1.20 | 0.05-0.95 |
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