Abstract
The current study was conducted to assess the groundwater for irrigation purposes in the village of Ein Al-Husaan in Talafar district in Nineveh Governorate, based on the Water Quality Index (WQI) as an effective method for determining the suitability of water for irrigation. Ten wells were selected for five months with a sample site for each month and some physical, chemical, and biological tests were performed that include: pH, EC 25 , bicarbonate, chloride, and F. colif. In addition to calculating the irrigation coefficients of % Na, SAR (Sodium Adsorption Ratio), KR (Kelly Ratio), MAR (Magnesium Adsorption Ratio), RSC (Residual Sodium Carbonate), PI (Permeability index), and PS (Potenial Salinity), the results showed that the PS was higher than the permissible limits for irrigation as a result of the passage of water with the rocks of evaporators that contain sulfates, while the water quality index ranged between (54.83–61.58). This indicates that all the water from wells was of good quality according to the classification.
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