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北江飞来峡工程纵向围堰堰体及堰基的组成复杂。本文采用了有限元解拉普拉斯方程的方法解绘出不同上下游水位和高喷板墙不同渗流系数各种组合的等势线，并用当量渗流系数法计算了二十种不同上下游水位和堰体、堰基渗流系数组合的单宽渗流量，以及用局部流网法解出两组逸出比降和追出流速、最后得出可供工程单位参考的结论和理论规律。
Beijiang Feilaixia longitudinal cofferdam weir and cofferdam complex composition. In this paper, the finite element method is used to solve the Laplace equation to draw the equipotential curves of various combinations of different seepage rates and the different seepage coefficients of the high-jet wall, and the equivalent seepage coefficient method is used to calculate the tidal current of 20 different upstream and downstream water levels And the weir and weir base seepage coefficient combination of single-width seepage flow, as well as the use of local flow network method to solve the two groups of escape ratio and catch-up flow rate, and finally draw conclusions and theoretical rules for engineering units.