针对长江中下游堤防工程现状概化出典型条件，采用有限元数值模拟方法对堤身堤基渗流场进行了模拟计算，分析了作用水头、堤身渗透性、弱透水覆盖层厚度、分别隐伏于覆盖层下和出露于地表的强透水层的厚度、外滩宽度和河泓 切割程度等因素对堤身堤基渗流规律的影响，总结出一般性规律。

Aiming at the levee engineering on the midd le and lower reaches of Yangtze River,some typical conditions are gene ralized.The seepage fields in levee and its foundation under different condition s ar e simulated with FEM.The influences on seepage field by various factors,such as water head,levee permeability,less peamable covering strata thickness,the thic knesses of strong peamable layers laid under overburden and exposed to the groun d surface ,the wideness of foreland and the depth of river bed cut by water flow etc.,are analysed respectively.General regularities are summarized. 