The quality of groundwater standards in Muttom–Mandaikkadu coastal stretch is the focus of the present study, whose coastal aquifers are particularly at risk due to intrusion of marine water. Thirty groundwater samples were scrutinized for the assessment of physical and chemical parameters during January and June. Hydrochemical characteristics were spatially depicted to understand the spatial variations such as (pH, EC, TDS, Na⁺, K⁺, Ca²⁺ and Mg²⁺, SO₄²⁻, HCO₃₋, and Cl⁻). Drinking water quality index based on those 11 parameters and irrigation water quality index based on EC, Na%, sodium adsorption ratio and permeability index was used to assess the water quality for drinking and irrigation, respectively. These results demonstrate that dominant hydrochemical facies for groundwater in both months are Na-K-Cl-SO₄ type and Ca-Mg-Cl-SO₄ type. The USSL diagram endorses that most of the water samples belong to low-medium salinity with low sodium hazards. Cl⁻/HCO₃⁻ ratio indicates that the majority of the samples show low to moderate seawater intrusion in the study area. Additionally, six vertical electrical sounding measuring points (Schlumberger array) were carried out in order to determine the number of the underlying layers, aquifer depths and their thicknesses as well as its influence by the marine water. The geophysical self-potential measurements suggest that the groundwater in the Manavalakurichi area is prone to contamination by seawater intrusion, confirmed by the use of Schlumberger vertical electrical sounding. For better understanding, the subsurface layers were shown in a 2D model using the constructed geoelectrical cross section.

Muttom–Mandaikkadu沿海地区的地下水标准质量是本研究的重点，由于海水的入侵，其沿海含水层尤其处于危险之中。在1月和6月检查了30个地下水样品，以评估其理化参数。水化学特性空间上描绘理解的空间变化，例如（pH值，EC，TDS，钠⁺，K ⁺，钙²⁺和Mg ²⁺，SO ₄ ^2-，HCO _3-和Cl ^-）。以这11个参数为基础的饮用水水质指数和以EC，Na％，钠吸附率和渗透率指数为基础的灌溉水水质指数分别用于评价饮用水和灌溉水的水质。这些结果表明，两个月中主要的地下水水化学相为Na-K-Cl-SO ₄型和Ca-Mg-Cl-SO ₄型。USSL图表支持大多数水样属于低盐度，低钠危害的低盐度。氯^- / HCO ₃ ^-比值表明大多数样本在研究区域内显示出低至中等的海水入侵。此外，还进行了六个垂直的电测深点（斯伦贝谢阵列），以确定下伏层的数量，含水层的深度及其厚度以及海水对海水的影响。地球物理自电势测量表明，Manavalakurichi地区的地下水易于受到海水入侵的污染，这一点已通过使用斯伦贝谢垂直电测深仪得到证实。为了更好地理解，使用构造的地电横截面在2D模型中显示了地下层。