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运用一维突变界面有限元模型,对地表水位的线性变化引起海水入侵的瞬态特性进行了参数研究。通过与狭缝槽(赫尔-肖模拟)模拟结果的比较,验证了数值解的有效性,建立了在距海岸不同距离内,咸水楔趾运移与地表水位各种线性上升率之间的一般关系;对地表水位停止上升后界面的运动进行了监测。研究成果具有广泛的适用范围,并有助于沿海地区制订控制海水入侵的方案。
By using the one-dimensional abrupt interface finite element model, the transient characteristics of seawater intrusion caused by the linear variation of surface water level are studied. The validity of the numerical solution is verified by comparison with the simulation results of slit groove (Hull-Shaw simulation). The linear rise rates of wedge toe migration and surface water level at different distances from the coast are established Of the general relationship; the surface water level stopped rising after the interface movement was monitored. The research results have a wide range of applicability and help to develop coastal areas plan to control sea water intrusion.