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采用有限元解拉普拉斯方程的方法解绘出广东北江飞来峡工程纵向围堰不同上、下游水位和高喷板墙不同渗流系数典型组合的等势线，并用当量渗流系数法计算了不同上、下游水位和堰体、堰基渗流系数组合的单宽渗流量，用局部流网法解出逸出比降和逸出流速．最后得出结论和理论规律．
The finite element method was used to solve the typical contour of the typical combinations of different upstream and downstream water levels and the high seepage wall of the longitudinal cofferdam in the Beijiang River in the Beijiang River in Guangdong Province. The equivalent seepage coefficient method was used to calculate The single-width seepage flow rate of different upstream and downstream water levels and weir and weir base seepage coefficient combination is calculated by local flow net method. Finally draw conclusions and theoretical rules.