Abstract
This study is aimed to assess and evaluate the suitability of groundwater of the area located to the south-east of Al-Ain area in the UAE using hydrogeochemcical approach. The chemical analyses of groundwater samples collected from the study area showed that the groundwater salinity is high which resulted from heavy groundwater pumping. High chloride concentrations in groundwater of Mubazarah and Neima might be attributed to the entrapped saline water within the limestone sequence of Jabal Hafit, or it can be the agricultural activities as it clear from the positive relationship between Cl- and Br-. High sulphate concentrations in groundwater might be related to the presence of gypsum and anhydrite within the limestone sequence of Jabal Hafit. The anionic and cationic compositions of groundwater indicate that the chloride and sodium ions are the dominant and presence of bicarbonate and sulphate may reflect the mixing of such water by the recent freshwater through the existing structural lineaments within the study area. The hydrochemical parameters indicate a relative increase in the concentration of calcium, magnesium and sulphate ions and this could reflect the influence of carbonates and evaporite sediments.
Highlights
The study area is located within the vicinity of Al-Ain region in which the climate is deficient in rainfall, with a mean annual rainfall of about 96.4 millimeters [1]
The electrical conductivity of groundwater samples collected from the study area varied between 2.989 mS/cm in a farm west of Neima (Well No 9) and 27.188 mS/cm in Ain Bu Sukhanah (Well No 34) (Figure 4)
The temperature of the collected groundwater samples in the study area varies between 29 ̊C and 49.1 ̊C with a mean value of 35.59 ̊C
Summary
The study area is located within the vicinity of Al-Ain region in which the climate is deficient in rainfall, with a mean annual rainfall of about 96.4 millimeters [1]. Ain Al-Faydah (Ain Bu Sukhanah) is the only spring with Al-Ain area, which is located about 15 Km south of Al-Ain and about 2 km west of Jabal Hafit. The spring represents the discharge area of a deep water source which finds its way up through one of several thrust faults dissecting the area. The aquifer in the area is recharged by the infiltration of the precipitation in the interdune areas and gravel plains and from Jabal Hafit. Another source of recharge includes irrigation water, upward vertical recharge from deeper rocks and infiltration of water lost from the leaky water transmission lines [3]
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