International Campus, Ferdowsi University of Mashhad, Mashhad, Iran.
Department of Geology, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, Iran.
Environ Geochem Health. 2019 Jun;41(3):1235-1250. doi: 10.1007/s10653-018-0214-9. Epub 2018 Nov 8.
Water quality for drinking and irrigation usage was examined in Kardeh dam basin in NE Iran. Thirty-two surface and groundwater samples were collected and analyzed for major ions of Ca, Mg, Na, K, HCO, CO, SO and Cl by using standard analytical methods of titration and atomic absorption spectrophotometry at geochemistry laboratory of Ferdowsi University of Mashhad. Dominant cation in most of the water samples are Ca and Mg, and dominant anion is HCO. Water quality index (WQI) was calculated based on physicochemical parameters such as pH, EC and major ions. The WQI values were less than 100 (maximum permissible value) for all samples and suitable for drinking usage; nevertheless, water quality decreased from northwest toward the southeast of studied area. Also, based on modified NSFWQI, the water resources were classified into average and good categories, which are suitable for irrigation uses. More than 40% of the samples are not suitable for irrigation uses based on magnesium hazard values. Carbonate rocks have the main effect on hydrogeochemical facies and the water quality in studied area. According to drinking and irrigation indices, water quality is reducing from upstream toward downstream to the southeast of the basin.
伊朗东北部 Kardeh 大坝流域的饮用水和灌溉用水水质进行了检测。在马什哈德 Ferdowsi 大学地球化学实验室，采用滴定和原子吸收分光光度法等标准分析方法，对 32 个地表水和地下水样本中的 Ca、Mg、Na、K、HCO、CO、SO 和 Cl 等主要离子进行了分析。大多数水样中的优势阳离子为 Ca 和 Mg，优势阴离子为 HCO。基于 pH 值、电导率和主要离子等理化参数，计算了水质指数（WQI）。所有样本的 WQI 值均小于 100（最大允许值），适合饮用；然而，研究区从西北向东南方向水质逐渐下降。此外，根据改良的 NSFWQI，水资源被分为平均和良好类别，适合灌溉用途。超过 40%的样本不适合灌溉用途，因为其镁危害值超标。碳酸盐岩对水文地球化学相和研究区的水质有主要影响。根据饮用水和灌溉指标，水质从上游向东南方向的下游方向逐渐变差。
