SUITABILITY OF WELLS WATER FOR AGRICULTURAL USE IN SOME OASIS IN WESTERN IRAQI DESERT

Abstract

The aim of this study is to evaluate the water of the wells existed in the three Oasis within the western desert ofIraq, these Oasis are (Km-98, Al-kesheiti and Fehada ) located within the lower widian district. The groundwater observed during one year. Analysis were performed for water samples to be used in evaluation of waterfor irrigation purposes, according to standard limits suggested by FAO. The results of analyses indicated that theground water of Km-98 and Al-kesheiti Oasis are classified as slightly to moderate hazard, while ground waterof Fahada was classified as hazard water. The sodium adsorption values in all water of oasis are plotted withinclass S1. The toxic effect of water on plant are unlimited to moderate effect for Na, Cl, B. According to the pipertri linear method, the ground water of Oasis classified as Calcium-Sulphate family with two major water types ofalkaline properties thoseand Na-Ca; HCO3-SO4 and Mg-Ca; HCO3-SO4 water type. The origin of the groundwater is meteoric (rainfall infiltration).