A hydrochemical study on the coastal aquifers were collected initiated to determine the factors affecting the groundwater chemistry in South India. 48 groundwater samples from bore wells during post monsoon period. The samples were measured for in situ parameters and major ions following the standard procedures. The analyzed results were further interpreted using geochemical plots, ionic ratios, water quality indices, geochemical modeling and statistics. pH values in the groundwater ranged from 6.6 to 8.0 and alkaline in nature. The average value of EC was 7155 μS/cm and higher values were mostly distributed along the coastal region of the study area. From the Piper plot, hydrochemical evolution path was identified, from Ca−HCO₃ (recharge waters) to mixed Ca-Mg-Cl (reverse ion exchange waters) through Ca-Cl types (leachate waters), indicating the reverse ion exchange and seawater intrusion. Saturation index reflected that Calcite was oversaturated due to availability of Ca and HCO₃ ions. Factor analysis further improved the understanding of the major controlling hydrochemical processes for groundwater chemistry. The hydrochemistry of the coastal aquifer was affected by several factors such as dissolution, water-rock interaction, reverse ion exchange, seawater intrusion, and influence of minor agricultural. The water quality assessment showed that the concentration of most of the parameters exceeded the standards limit, and considered as unsuitable for drinking purposes. But they are inferred to be suitable for agricultural purposes according to SAR, Na%, RSC and PI.

已开始对沿海含水层进行水化学研究，以确定影响印度南部地下水化学的因素。季风后期间，从井中抽取了48个地下水样品。按照标准程序测量样品的原位参数和主要离子。使用地球化学图，离子比率，水质指数，地球化学模型和统计数据进一步解释了分析结果。地下水的pH值范围为6.6至8.0，自然界呈碱性。EC的平均值为7155μS/ cm，较高的值主要分布在研究区域的沿海地区。根据Piper图，从Ca-HCO ₃确定了水化学演化路径（补给水）通过Ca-Cl类型（渗滤液水）混合成Ca-Mg-Cl（反向离子交换水），表明反向离子交换和海水入侵。饱和指数反映方解石由于Ca和HCO _3的可用性而过饱和离子。因子分析进一步增进了对地下水化学主要控制水化学过程的理解。沿海含水层的水化学受几个因素的影响，例如溶解，水-岩相互作用，反离子交换，海水入侵和次要农业的影响。水质评估表明，大多数参数的浓度都超过了标准限值，并被认为不适合饮用。但是根据SAR，Na％，RSC和PI推断它们适合农业用途。