Abstract
Quantity and quality of water available for irrigation vary from place to another. The evaluation of water quality has been carried out to determine suitability of spring water for irrigation. Six spring water samples were collected from the study area located in Ain Talawi area and the surrounding villages, northern Iraq. Quality assessment was made through the analysis of Ca++, Mg++, Na+, K+, Cl-, SO4-2, HCO3-1, pH, TDS, and EC. Based on these analyses, parameters like sodium adsorption ratio, sodium percent, residual sodium carbonate, potential salinity, magnesium hazard and permeability index were calculated. All above parameters approximately are fit for irrigation purpose except Salinity of water which is very high due to the dissolution of gypsum in Fatha formation. It may be concluded that these spring water are suitable only for irrigating crops with high salt tolerance under special system of soil management.
