The study was undertaken to assess the physicochemical
and chemical quality of the Tannur dam water in southern Jordan. The water
samples were collected in two intervals the first during May 2015 and the
second during September 2015. All samples were analyzed for temperature,
conductivity, dissolved oxygen, pH, major cations (Ca2+, Mg2+,
K+, Na+), andmajor anions
(Cl-, NO3-, HCO3- and SO42-). The
hydrogeochemical analyses of thirty-six water samples were used to determine
the properties and type of water in the Tannur dam. The ion concentration in
the water samples was from dissolution of carbonate rocks and ion exchange
processes in clay. The general chemistry of water samples was typical alkaline
earth waters with prevailing bicarbonate chloride. The PHREEQC Hydrogeochemical
modeling was used to obtain the saturation indices of specific mineral phases,
which might be related to interaction with water and aquifer, and to identify
the chemical species of the dissolved ions. Calcite and dolomite solubility
were assessed in terms of saturation index where they show positive values
indication oversaturated SI > 0. The hydrogeochemistry behavior is rather
complicated and is affected by anthropogenic and natural sources. The positive correlation
values between various parameters indicate that most of ions result from same
lithological sources. The abundance of the major ions in water samples is in
the following order: HCO3-> Ca2+
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