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莱州湾东、南沿岸地区是世界上具代表性的海水入侵区域之一，该地区有海水、埋藏卤水（古海水）两种不同的入侵类型。为揭示该地区地下咸－淡水过渡带复杂的水化学变化过程和地下淡水被侵染的机理，通过在典型地段咸－淡水过渡带的４条地下水观测剖面，进行了长期水化学监测分析。研究表明，现代海水、卤水在入侵过程中的地下水水化学特征有明显不同；地下水与含水岩层间的离子交换与离子吸附作用对咸水的地下入侵过程产生重要影响。
The east and south coasts of Laizhou Bay are one of the representative areas of seawater intrusion in the world. There are two types of intrusion, seawater and buried brine (ancient seawater). In order to reveal the complicated process of chemical changes in the salty-freshwater transitional zone and the mechanism of underground freshwater infiltration in the area, long-term water chemistry monitoring and analysis were conducted through four groundwater observation sections in the salty-freshwater transitional zone. The results show that the chemical characteristics of groundwater in modern seawater and brine during the invasion process are obviously different. The ion exchange and ion adsorption between groundwater and aquifer play an important role in the underground invasion of saline water.