The geochemical evolution of groundwater in the coastal area of the Thriassion Plain, Attica, Greece, has been investigated using major and trace elements of chemical analyses. The groundwater of good quality (total dissolved solids TDS between 400 and 1100 mg/l) has been found in the Plio-Pleistocene sediments up to the depth of 90 m below sea level. Moreover, the existing contamination of groundwater in the Pleistocene-Holocene sediments possibly originates from the pumping of the old brackish water of the upper aquifers and the returns of the irrigation water as well as the possible occurrence of palaeo-seawater in the aquifers. A five-stage conceptual model is suggested for groundwater geochemical evolution from the main recharge area to the main discharge area. Limestone and dolomite dissolution in the recharge area leads to one end member of the Ca-Mg-HCO₃ type. These waters evolve to Ca-Mg-Cl-HCO₃ along their flow path possibly due to the dissolution of relics of evaporites, as well as mixing with seawater that is Na-Cl type, the other end member. Two more hydrogeochemical processes have also been identified; possibly gypsum, anhydrite, halite and fluorite dissolution; calcite, aragonite and dolomite precipitation.

已使用化学分析的主要和微量元素调查了希腊阿提卡（Thaticssion Plain）特里亚斯平原（Thriassion Plain）沿海地区地下水的地球化学演变。在上里新世沉积物中发现了高质量的地下水（总溶解固体TDS在400至1100 mg / l之间），直至海平面以下90 m的深度。而且，更新世-全新世沉积物中地下水的现有污染可能源自上层含水层的老咸水的抽水和灌溉水的回流以及含水层中古海水的出现。对于从主要补给区到主要排放区的地下水地球化学演化，提出了一个五阶段的概念模型。₃种。这些水沿其流路演变成Ca-Mg-Cl-HCO ₃，可能是由于蒸发了的遗留物溶解，以及与另一端构件Na-Cl型海水混合造成的。还确定了另外两个水文地球化学过程。可能将石膏，无水石膏，石盐和萤石溶解；方解石，文石和白云石沉淀。