ملخص البحث :

Water quality was assessed for the main Hilla canal and three distributary channels (HC 19 at 49+243 km, HC 20 at 52+123 km, and HC 2L at 44+056 km), located in the alraarinjia of Babil, for the Hilla-Kifil Irrigation Project. The Canadian Water Quality Index (CWQI) is used to assess the irrigation water quality of the Hilla Main Canal and three distributary channels. Water samples were collected monthly from February to May 2021 and analyzed for electrical conductivity, pH, sodium adsorption ratio, total hardness, magnesium, sodium, and calcium, and compare with specifications. Based on the current outcomes, it was found that all the elements fall within the specifications until some tests where they were outside the specification, as in (TH). Besides, the value of CWQI (94.73%) was between good and excellent, and this indicates that the water is appropriate for irrigation purposes in that area. The findings of the current studies, in comparison with previous studies on the one hand and the standard specifications on the other, proved the effectiveness of the indicator and the accuracy of its results. This means, The Hilla Main Canal and distributary channels generally have good irrigation water quality according to the CWQI, But the slight increase in total hardness requires monitoring and treatment.