The temporal changes in hydro-geochemistry of groundwater from lithological diversity of Amba Dongar area were assessed from human health risk point of view. In view of this, 104 samples were collected in post- (POM) and pre-monsoon (PRM) seasons to understand the ionic concentrations and seasonal variations in major cations and anions. Based on concentration of physicochemical parameters it is inferred that groundwater quality is good for drinking and most of the parameters are within allowable limit of the World Health Organisation (WHO). However, EC, TDS, Ca²⁺ and HCO₃⁻ exceed the desirable while NO₃ and F content are found beyond the permissible limits. The results 33% and 15% samples for nitrate and 60% and 63% samples for fluoride in POM and PRM, respectively, are above permissible limits of WHO, indicating a high health risk to inhabitants. The Piper’s trilinear diagram depicts Ca²⁺–Mg²⁺ HCO₃⁻ as major water type in both the seasons and the plots diagram that the chemical rock weathering and rock–water interaction are responsible for modifying the groundwater chemistry. Further, the total hazard index indicates that children have higher risk than adults in both. Hence, antipollution filters and rainwater recharging structures are recommended as an action to be taken to lessen the health hazard.

中文翻译：

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印度古吉拉特邦西部半干旱地区岩性多样性对地下水地球化学的时空变化和潜在的健康风险评估

从人类健康风险的角度评估了安巴东加尔地区岩性多样性对地下水水文地球化学的时空变化。有鉴于此，在季后（POM）和季风前（PRM）季节收集了104个样品，以了解主要阳离子和阴离子的离子浓度和季节性变化。根据理化参数的浓度，可以推断出地下水水质适合饮用，而且大多数参数都在世界卫生组织（WHO）的允许范围内。然而，EC，TDS，钙²⁺和HCO ₃ ^-超过所希望的，而NO ₃和F含量超出允许的范围。结果表明，分别在POM和PRM中硝酸盐的33％和15％的样品以及氟化物的60％和63％的样品超过了WHO的允许限值，表明居民面临很高的健康风险。Piper的三线性图将Ca ²⁺ –Mg ²⁺ HCO ₃ ^−表示为两个季节中的主要水类型，而绘图图则表明化学岩石的风化作用和岩水相互作用会影响地下水化学。此外，总危险指数表明，儿童和儿童的风险均高于成年人。因此，建议采取防污染过滤器和雨水补给结构，以减少对健康的危害。