Abstract

The aim of this study is to analyse the water of the wells in order to know the physical and chemical features and its effect on the soils irrigated by it. The analysis of the physical and chemical features was as following:
The water which was used to irrigate Qat plants in the study sites was alkaline in general. It ranged between the PH values (7.50 -7.75).Regarding the EC of the studied samples used for irrigation of the planted soils with Qat, it ranged between (1.65 – 1.75) mmoles /cm. While the chemical analysis show that: The concentration of magnesium ions was between ( 1.6-2.43)mEq/L. while the concentration of Calcium ions ranged between(1.6 – 2.2)mFq/L. the of sodium ion ranged between (9.49 – 10.43) mFq/L. The concentration of potassium was low, It ranged between (0.26- 1.09)mFq/L. The concentration of bicarbonates was low, it ranged between (7.83-9.57)mFq/L. the concentration of chloride ion between (5.3- 6.06)mFq/L.and the concentration of sulfates ranged between (27.7-31.63) mFq/L. The results have shown that the wells of the investigated area are free of nitrates ions. the SAR has been calculated as it is one of the important factors in determining the validity of ground water for purposes of irrigation. As well as the majority of wells water can be used for purposes of irrigation in different soils and does not affect the permeability of soil and the filtration average. On the other hand, it was found that the percentage of magnesium is 67% of wells which surpassed the standard allowable limits which causing harmful effect in growing and producing agricultural crops.