导出了能反映含水层中水—岩间阳离子交换作用的溶质运移方程,并提出了一个新的海水入侵数学模型。模型以交换阳离子Na~+和Ca~(2+)作为模拟因子,考虑了海水入侵过程中水—岩间的Na~+—Ca~(2+)交换,模型用于模拟山东省龙口市黄河营地区的海水入侵,取得了令人满意的结果,从而证明导出的溶质运移方程是正确的,建立的模型是可靠的。 A solute transport equation that reflects the water-rock cation exchange in the aquifer is derived and a new mathematical model of seawater intrusion is proposed. In this model, Na ~ + and Ca ~ (2+) exchange cations are considered as modeling factors, taking into account Na ~ + -Ca ~ (2+) exchange between water and rock during the seawater intrusion process. The model is used to simulate the Yellow River The seawater intrusion in the camp area has achieved satisfactory results, which proves that the derived solute transport equation is correct and the established model is reliable.