Abstract
This paper focuses on the Qareh Sou Basin in Golestan Province, Iran. Golestan Province is the third largest cereal producer in Iran and water scarcity and salinity are major problems in this area. This study attempts to facilitate the comprehension of system behavior with respect to water quality issues and hydro-geochemical coefficients within the Qareh Sou Basin. This study was carried out during the year 2010. Various parameters, such as pH, EC, chloride, sulfate, bicarbonate, sodium, potassium, calcium and magnesium have been determined for evaluation purposes. Then, Ca/Mg, Na/Cl, Mg/(Ca + Mg), Ca/HCO3, (Ca + Mg)–(HCO3 + SO4), (Na + K)–Cl, (Ca + Mg + Na + K)–Cl, HCO3 + SO4, Ca + Mg and chloro-alkaline indices (CAI) were calculated. Results show that cation exchange probably is an important factor in the hydrochemistry and silicate mineral weathering. Also, CAI-1 plot against CAI-2 demonstrates that most of samples have positive values which suggest normal ion exchange in the system. The carbonic acid is the main agent of calcite, limestone and dolomite weathering which occurs in some stations. According to Chadha’s diagram, the type of water is determined as Ca–Mg–HCO3.
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We are thankful to the Regional Water Organization of Golestan Province for providing the data and allowing its use.
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Kurdi, M., Hezarkhani, A. & Eslamkish, T. Assessment of chemical properties and hydro-geochemical coefficients at the Qareh Sou Basin, Golestan Province, Iran. Environ Earth Sci 72, 3243–3249 (2014). https://doi.org/10.1007/s12665-014-3228-3
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DOI: https://doi.org/10.1007/s12665-014-3228-3