تقييم المياه الجوفية بمدينة سوسة في شرق ليبيا لبعض العناصر الثقيلة وايون النترات

Evaluation of groundwater potential and its quality assessment for irrigation has recently become a major concern, especially in developing countries due to various constraints. The aim of this study is to evaluate the quality of groundwater and establish whether they are safe for irrigation usage in Sousa city, Libya. The aim of the study to evaluating of groundwater polluted with Lead, Cadmium and Chromium metals and nitrates ions. Five water samples were collected from different wells were and analyzed. For understanding the hydro chemical and polluted characteristic with some heavy metal as (Pb, Cd and Cr ) respectively, and the suitability for irrigation purposes. Nine parameters were considered for calculating the irrigation water quality indices which are pH , electrical conductivity (EC), ions ( cations and anions) such as Calcium, magnesium, potassium sodium, chloride ,bicarbonate, sulphate,, in addition to some calculated parameters for as SAR, Adj. SAR, RSC, TDS and pHc, furthermore some heavy metals and nitrates ions were investigated. The results of polluted with heavy metals and nitrate ion, showed that the most water samples did not exceed the maximum limit according to FAO and Libyan local standard, except W05 exceeding the permissible limit for lead and nitrate ion, and W02 for pb. The results of this study emphasis that routine monitoring of groundwater play a vital role in maintaining its quality and serve as guideline for sustainable management of water quality in region study. Keywords: irrigation water, heavy metals, nitrate, ground water.