Assessment of the quality of water and the hydrochemical formula used for some groundwater wells in Najaf governorate / iraq

Abstract

Analyses of water for twenty two selected wells from najaf city are includedchemial constituents (T.D.S., Ca+2, Mg+2, Na+, K+, Cl- ,SO4 -2 , HCO3 - 2, and NO3 -) and pHysicalvariables (pH,Electric conductivity,and deep of well) . Based on the chemical and physicalvariables values,the water quality and formula for each well were identified. Based onsome known classification ,the water of these wells was determined for human andanimal drinking ,for irrigation, for industries,and for construction.The results showedthat the wells water with slightly to moderately salinity and there are relatively highfor Ca+2, Na+, Cl- ,and SO4 - 2 , also the results showed that water among slightly , moderatelyand highly mineralization. This study showed that all wells are not suitable for humanconsumption but are suitable for animal drinking.Irrigation is one of the important usesof well water,this study showed the validity of some wells for irrigation and other notvalid and also adopted some important indicators to demonstrate the validity ofthis water for irrigation such us sodium adsorption ratio (S.A.R.) and found it noharmful effects of sodium for use this water and Percentage of sodium (Na+%) indicatorshowed that allows this water for irrigation.This study have been found invalid for use inindustrial process,but it proved the validity of most wells for bulding and construction.When calculating formulas and chemical water quality statement concluded that morewells with water quality (sulfate-chloride-sodium-magnesium).